Hearth and Home Technologies A36R, A42RH, A42R, A36RH User Manual

Models:
A36R, A36RH
A42R, A42RH

Wood Burning Fireplace

Owner’s Manual

Installation and Operation

DO NOT DISCARD THIS MANUAL

• Important operating
and maintenance
instructions included.

• Read, understand
and follow these
instructions for safe
installation and
operation.

WARNING

If the information in these instruc­tions is not followed exactly, a
fi re may result causing property
damage, personal injury, or death.

• Do not store or use gasoline or other fl am-
mable vapors and liquids in the vicinity of
this or any other appliance.

• Do not overfi re. Overfi ring will void your
warranty.

• Comply with all minimum clearances to
combustibles as specifi ed. Failure to
comply may cause house fi re.

Installation and service of this fi replace
should be performed by qualifi ed personnel.
Hearth & Home Technologies suggests NFI
certifi ed or factory-trained professionals, or
technicians supervised by an
NFI certifi ed professional.

NOTICE

DO NOT

DISCARD

• Leave this manual with
party responsible for
use and operation.

WARNING

HOT SURFACES!

Screen/mesh, glass doors
and other surfaces are hot
during operation AND cool
down.

Hot screen/mesh and glass doors will cause burns.

• DO NOT touch screen/mesh or glass doors until
cooled

• NEVER allow children to touch screen/mesh or glass
doors

• Keep children away

• CAREFULLY SUPERVISE children in same room as
fi replace.

• Alert children and adults to hazards of high
temperatures.

High temperatures may ignite clothing or other
fl ammable materials.

• Keep clothing, furniture, draperies and other
fl ammable materials away.

WARNING

Fire Risk

• For use with solid wood fuel or decorative
gas appliance only.

• DO NOT install unvented gas logs.

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

1

Read this manual before installing or operating this fi replace.

Please retain this owner’s manual for future reference.

Congratulations!

Congratulations on selecting a Heatilator wood burning
fi replace. The Heatilator fi replace you have selected is
designed to provide the utmost in safety and reliability.

As the owner of a new fi replace, you’ll want to read and
carefully follow all of the instructions contained in this
owner’s manual. Pay special attention to all cautions and
warnings.

This owner’s manual should be retained for future refer­ence. We suggest you keep it with your other important
documents and product manuals.

Your new Heatilator wood burning fi replace will give you
years of durable use and trouble-free enjoyment. Wel­come to the Heatilator family of fi replace products!

Homeowner Reference Information

We recommend that you record the following pertinent
information about your fi replace:

Model Name: Date purchased/installed:

Serial Number: Location on fi replace:

Dealership purchased from: Dealer phone:

Notes:

Listing Label Information/Location

The model information regarding your specifi c fi replace can be found on the rating plate located on the smoke shield of
the fi replace.

Serial

Number

Grate

Fireplace

Model

FIREPLACE NO.

FIRECHAMBER INTENDED FOR USE WITH HEARTH & HOME TECHNOLOGIES INC. LISTED FIREPLACE PARTS. SEE INSTALLATION AND
OPERATING INSTRUCTIONS FOR THIS MODEL. ONLY HEARTH & HOME TECHNOLOGIES INC. GLASS DOOR KITS CAN BE INSTALLED ON THIS UNIT.

FIREPLACE ALSO FOR USE
IN MANUFACTURED HOMES

FAN KIT
MODEL NO.

DO NOT OVERFIRE. USE ONLY: SOLID WOOD FUEL OR
LISTED DECORATIVE GAS APPLIANCE. DO NOT USE A
FIREPLACE INSERT OR OTHER PRODUCTS NOT
SPECIFIED FOR USE WITH THIS PRODUCT. IF DOORS
ARE USED OPERATE FIREPLACE WITH DOORS FULLY
OPEN OR CLOSED ONLY. WHEN BURNING A
DECORATIVE GAS APPLIANCE IN THE FIREPLACE,
ADJUST DAMPER TO THE FULLY OPEN POSITION.

2

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

WARNING: RISK OF
FIRE DAMAGE. REPLACE
GRATE WITH HEARTH & HOME
TECHNOLOGIES INC.

YES

NO

&

MODEL NO.

CLEARANCE TO
COMBUSTIBLES:

WARNING! THIS FIREPLACE HAS NOT BEEN TESTED WITH AN UNVENTED
GAS LOG SET. TO REDUCE THE RISK OF FIRE OR INJURY, DO NOT
INSTALL AN UNVENTED GAS LOG SET INTO FIREPLACE.

WARNING! THIS APPLIANCE IS NOT FOR USE AS COOKING EQUIPMENT.

IF INSTALLATION OR OPERATING INSTRUCTIONS ARE MISSING
CONTACT: HEARTH & HOME TECHNOLOGIES INC.,
1915 W. SAUNDERS ST., MT. PLEASANT, IA 52641.

CHIMNEY
2 IN. MIN.

RATED AT
115 VOLTS, 50/60 Hz.,

MODEL NO.

FIREBOX

MFG. DATE

AMP.

IN.
MIN.

Safety Alert Key:

!

• DANGER! Indicates a hazardous situation which, if not avoided will result in death or serious injury.

• WARNING! Indicates a hazardous situation which, if not avoided could result in death or serious injury.

• CAUTION! Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.

• NOTICE: Indicates practices which may cause damage to the fi replace or to property.

Table of Contents

Congratulations! 2
Warranty 4

1 Listing and Code Approvals 6

A. Appliance Certifi cation 6
B. Non-Combustible Materials 6
C. Combustible Materials 6

User Guide

2 Operating Instructions 7

A. Your Fireplace 7
B. Seasoned Wood 8
C. Starting a Fire 8
D. Grate 8
E. Firescreen 8
F. Flue Damper 8
G. Refractory 8
H. Glass Doors 9
I. Outside Air (optional) 9
J. Fan Kit (optional) 9
K. Vented Gas Log Sets & Gas Log Lighters 9
L. Optional Components 9
M. Clear Space 9
N. Wood Fuel 10

3 Maintainance and Service 11

A. Disposal of Ashes 11
B. Chimney Inspection/Cleaning 11
C. Check Firebox Refractory 12
D. Inspect Grate 12
E. Glass Cleaning 12

4 Troubleshooting Guide 13

Installer Guide

5 Getting Started 14

A. Typical Fireplace System 14
B. Design and Installation Considerations 15
C. Draft 15
D. Negative Pressure 15
E. Locating Fireplace & Chimney 16
F. Tools and Supplies Needed 17
G. Typical Fireplace System 17
H. Inspect Fireplace and Components 17

6 Framing & Clearances 18

A. Select Fireplace Location 18
B. Clearances 19
C. Sidewalls/Surrounds 20
D. Frame the Fireplace 20

7 Installation of Fireplace 21

A. Things to Consider 21
B. Position the Fireplace 21
C. Place Protective Metal Hearth Strips 21
D. Level Fireplace 21
E. Install Outside Air Kit 23

8 Chimney Assembly 24

A. Chimney Requirements 25
B. Using Offsets/Returns 26
C. Assembling Chimney Sections 27
D. Install Chimney Air Kit 27
E. Installing Ceiling Firestops 27
F. Installing Attic Insulation Shield 28
G. Cut out Hole in Roof 29
H. Complete Installation 29
I. Install Flashing 29
J. Chimney Termination Requirements 30

9 Chase Installations 31

A. Construct the Chase 31
B. Install Fireplace & Chimney 32
C. Install Chase Top 32
D. Install Termination Cap 33

10 Shrouds 35

A. Radiation Shield 35
B. Field Constructed Shrouds 35

11 Finishing 37

A. Non-Combustible Materials 37
B. Combustible Materials 37
C. Hearth Extension 37
D. Finishing Material 38
E. Combustible Mantel 39
F. Sidewalls/Surrounds 39

12 Accessories 40

A. Gas Log/Lighter Provision 40
B. Wood Burning Inserts 40
C. Install Fan 40

13 Reference Materials 41

A. Fireplace Dimensions 41
B. Fireplace Components 42
C. Chimney Components 43
D. Service Parts 46
E. Contact Information 48

Note: An arrow ( ) found in the text signifi es change in content.

Î

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

3

Warranty

Hearth & Home Technologies LIMITED WARRANTY

Hearth & Home Technologies (“HHT”) and its respective brands extends the following warranty for HHT gas, wood,
pellet and electric appliances purchased from an authorized HHT dealer and installed in the United States of America or
Canada. Warranty starts with date of purchase by the original owner (End User) except as noted for replacement parts.

Warranty Period HHT Manufactured Appliances and Venting

Parts Labor Gas Wood Pellet

1Year XXXXXX

EPA

Wood

Electric Venting

Components Covered

All Parts and Material Except as

covered by Conditions, Exclu-

sion, and Limitations listed

XX

2years

7years 3years X X X

10

years

Limited

Lifetime

90Days XXXXXX AllReplacementParts

Igniters, Electronic Compo-

nents, and Glass

srewolBXXXX

stoperiFXsraey3

faB&sgnitsaCXXsraey3sraey5 ?es

Firebox, HHT Chimney, Termi-

nation & Heat

Exchanger

slenaPyrotcarfeRdedloMX

yrotcarfeR&sgoL,srenruBXraey1

regnahcxEtaeH&xoberiFXraey1

See Conditions, Exclusions, and limitations. 9-01-08

CONDITIONS, EXCLUSIONS & LIMITATION OF LIABILITY

This warranty applies to the original owner and is transferable up to two years from date of purchase to the new
homeowner, provided the purchase was made through an authorized dealer or distributor of HHT, and the appliance
remains in its original place of installation.

The maximum amount recoverable under this warranty is limited to the purchase price of the product.

In no event shall HHT be liable for any incidental or consequential damages caused by defects in the product.

Adjustments, regular maintenance, cleaning and temporary repairs, or the failure to duplicate the problem in the home
is not covered under this warranty.

4021-645A 09-01-08 Page 1 of 2

4

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

This limited warranty does not extend to or include surface ?nish on the appliance or terminations, door gasketing, glass
gasketing, glass discoloration, ?rebrick, pellet logs, kaowool or other ceramic insulating materials. Rust and/or corrosion
on any of the metal surfaces, cast iron components, baf?es, ?repots, doors, or ?rebox area are not covered by this
warranty.

Noise resulting from minor expansion, contraction, or movement of certain parts is normal and complaints related to
this noise are not covered by this warranty.

HHT’s obligation under this warranty does not extend to damages resulting from: (1) installation, operation or
maintenance of the appliance not in accordance with the installation instructions; operating instructions and the
listing agent identi?cation label furnished with the appliance; (2) installation which does not comply with local building
codes; (3) shipping, improper handling, improper operation, abuse, misuse, accident or unworkmanlike repairs; (4)
environmental conditions, inadequate ventilation or drafting caused by tight sealing construction of the structure
or handling devices such as exhaust fans or forced air furnaces or other such causes; (5) use of fuels other than
those speci?ed in the operating instructions; (6) installation or use of components not supplied with the appliance or
any other components not expressly authorized and approved by HHT; and/or (7) modi?cation of the appliance not
expressly authorized and approved by HHT in writing.

This warranty does not apply to non-HHT venting components, hearth components or other accessories used in
conjunction with the installation of this product.

This warranty is void if the appliance has been over-?red or operated in atmospheres contaminated by chlorine,
?uorine, or other damaging chemicals the appliance is subject to prolonged periods of dampness or condensation, or
there is any damage to the appliance or other components due to water or weather damage which is the result of, but
not limited to, improper chimney or venting installation.

HHT’s liability under this warranty is limited to the replacement and repair of defective components or workmanship
during the applicable period. HHT may fully discharge all of its obligations under such warranties by repairing the
defective component(s) at HHT’s discretion. Shipping costs are not covered under this warranty.

Some states do not allow exclusions or limitation of incidental or consequential damages, so those limitations may not
apply to you. This warranty gives you speci?c rights; you may also have other rights, which vary from state to state.

EXCEPT TO THE EXTENT PROVIDED BY LAW, HHT MAKES NO EXPRESS WARRANTIES OTHER THAN THE
WARRANTY SPECIFIED HEREIN. THE DURATION OF ANY IMPLIED WARRANTY IS LIMITED TO DURATION OF
THE WARRANTY SPECIFIED ABOVE.

This Limited Warranty is effective on all HHT appliances sold after September 01, 2008 and supersedes any and all
warranties currently in existence.

If warranty service is needed, you should contact your installing dealer. If the installing dealer is unable to provide
necessary parts or components, contact the nearest authorized HHT dealer or supplier.

4021-645A 09-01-08 Page 2 of 2

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

5

1

Listing and Code Approvals

1

A. Appliance Certifi cation

This fi replace system has been tested and listed in accor-
dance with UL 127 and ULC-S610 standards by Under­writers Laboratories Inc. for installation and operation in
the United States and Canada.

This fi replace may be installed in sleeping rooms EX-
CEPT in manufactured homes. If installed with a gas log
set, provisions for the National Fuel Gas Code must be
met.

This fi replace has been tested and listed for use with the
optional components specifi ed in this manual. These op-
tional components may be purchased separately and in­stalled at a later date. Installation of an outside air kit will
require signifi cant reconstruction and is best if installed at
the time of fi replace installation.

Heatilator is a registered trademark of Hearth & Home
Technologies Inc.

WARNING! Risk of Fire! Hearth & Home Technologies
disclaims any responsibility for, and the warranty and
agency listing will be voided by the following actions.

DO NOT:

• install or operate damaged fi replace

• modify fi replace

• install other than as instructed by Hearth & Home
Technologies

• operate the fi replace without fully assembling all
components

• overfi re

• install an unvented gas log set

• install any component not approved by Hearth & Home
Technologies

• install parts or components not Listed or approved

Improper installation, adjustment, alteration, service or
maintenance can cause injury or property damage. For
assistance or additional information, consult a qualifi ed
installer, service agency or your dealer.

B. Non-Combustible Materials

• Materials which will not ignite and burn, composed of
any combination of the following:

- Steel - Iron

- Brick - Tile

- Concrete - Slate

- Glass - Plasters

• Materials reported as passing ASTM E 136, Standard

Test Method for Behavior of Metals, in a Vertical Tube
Furnace at 750° C

C. Combustible Materials

• Materials made of or surfaced with any of the following
materials:

- Wood - Compressed paper

- Plant fi bers - Plastic

• Any material that can ignite and burn; fl ame proofed or
not, plastered or un-plastered

NOTICE: This fireplace is tested and approved as a
decorative fi replace. It should not be factored as a primary
heat source in residential heating calculations.

6

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

2

User Guide

Operating Instructions

2

WARNING

HOT SURFACES!

Glass and other surfaces are hot during operation AND cool down.

Hot glass will cause burns.

• DO NOT touch glass until it is cooled

• NEVER allow children to touch glass

• Keep children away

• CAREFULLY SUPERVISE children in same room as fi replace.

• Alert children and adults to hazards of high temperatures.

High temperatures may ignite clothing or other fl ammable materials.

• Keep clothing, furniture, draperies and other fl ammable materials away.

If you expect that children may come into contact with this fi replace, we recommend a barrier such as a decorative
screen. See your dealer for suggestions.

A. Your Fireplace

WARNING! DO NOT operate fi replace before reading and understanding operating instructions. Failure to operate fi replace
according to operating instructions could cause fi re or injury.

Flue Damper

Control

Section 2.F.

Close Open

Refractory

Section 2.G.

Grate

Section 2.D.

Wood Fuel

Section 2.N.

Man

Hearth

tel

Clear Space
Section 2.M.

Gas Log Set

Gas Log Lighters

(not shown)

Section 2.K.

Firescreen

(not shown)

Section 2.E.

Glass Doors

(not shown)

Section 2.H.

Fan Control
Section 2.J.

Open

Outside Air Kit

Control

Section 2.I.

Close

Figure 2.1 General Operating Parts

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

7

B. Seasoned Wood

Properly seasoned wood is important for successful
operation of your fi replace. Most woodburning fi replace
problems are caused by burning wet, unseasoned wood.

Seasoned fi rewood is wood that is cut to size, split and air
dried to a moisture content of around 20%.

Imagine a wooden bucket that weighs about eight
pounds. Fill it with a gallon of water, put it in the fi replace
and try to burn it. This sounds ridiculous but that is exactly
what you are doing if you burn unseasoned wood.

A tree cut down a year ago and not split is likely to have
almost as high a moisture content now as it did when it
was cut.

Please refer to Section 2.N. for more detail.

C. Starting a Fire

NOTICE: You must establish a good draft to prevent smoke
spillage into the room.

WARNING! Risk of Fire! Keep combustible materials,
gasoline and other fl ammable vapors and liquids clear of
the fi replace.

DO NOT:

• store fl ammable materials close to the fi replace

• use gasoline, lantern fuel, kerosene, charcoal lighter

fl uid or similar liquids to start or “freshen up” a fi re in this
fi replace.

Keep all fl ammable liquids well away from the fi replace while
it is in use. Combustible materials may ignite.

D. Grate

This fi replace is designed to be used with the grate sup-
plied with this unit or one approved by HHT. The grate will
break down over time and will need occasional replace­ment.

WARNING! Risk of Fire!

integral grate.

• Keeps logs in place.

• Allows proper air circulation around the fi re.

Use only the factory-supplied

E. Firescreen

The fi rescreen is provided to control sparks. Keep it
closed when the fi replace is in use.

WARNING! Risk of Fire or Burns!

• Screen will not prevent burning materials from falling
out.

• Screen pulls or handles may be hot.

F. Flue Damper

• Refer to Figure 2.1 for location of control.

• Must be in fully open position (handle up toward the top
of the fi replace) during operation of the fi replace.

• Before lighting the fi replace, verify fully open position by
looking up from the inside of the fi replace.

WARNING! Risk of Fire and Asphyxiation! Open

damper prior to operating fi replace. A closed damper
overfi res the fi replace and spills smoke and fl ames
into the room.

• The fi rst three or four fi res should be of moderate size to
allow the oils and binders to be burned from the fi replace
and the refractory and paint to cure. You may notice
an industrial odor the fi rst few fi res. This is considered
normal.

• Use well-seasoned wood (see Section 2.N.).

• Open the fl ue damper to a fully open position.

• Place crumpled or twisted paper under the fi replace
grate.

• Loosely arrange kindling or small pieces of wood to form
a ‘tent’ on the fi replace grate.

• Pre-warm the fl ue to establish a draft to help reduce
smoke spillage during start-up. Hold a rolled up piece
of burning newspaper under the fl ue damper for a few
moments.

• Light the crumpled paper to ignite the kindling.

• Add small pieces of wood until a hot bed of embers has
been established.

• Add a minimum of three average size pieces of split
fi rewood, placed to allow combustion air and fl ames
between them.

CAUTION! Odors and vapors released during initial

operation may be irritating to sensitive individuals.

Open windows for air circulation.

G. Refractory

• The refractory is supplied to contain heat and provide
an attractive interior.

• It will break down over time and will need occasional
replacement. Small hairline cracks and discoloration are
normal and do not affect its safety.

• (See refractory maintenance Section 3.C.)

WARNING! Risk of Fire! DO NOT burn fi replace with-

out refractory. Use only refractory supplied by Hearth &
Home Technologies, Inc.

8

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

H. Glass Doors

• Glass doors are optional.

• Refer to Figure 2.2 for how to properly use them.

WARNING! Risk of Fire!

proved by Hearth & Home Technologies, Inc.

WARNING! Risk of Fire and Smoke! Fireplaces

equipped with doors should be operated only with
doors fully open or doors fully closed. If doors are left
partly open, gas and fl ame may be drawn out of the
fi replace opening.

FULLY OPEN

CORRECT

Install ONLY doors ap-

PARTLY OPEN

INCORRECT

K. Vented Gas Log Sets & Gas Log Lighters

• Optional.

• Vented gas logs or gas log lighters can be installed in
this fi replace. Follow the instructions provided with the
accessory for operation.

WARNING! Risk of Fire or Asphyxiation!

• DO NOT install unvented gas logs.

• Damper must be locked open.

• Gas fl ame may generate fumes.

L. Optional Components

• Other options may be available

• Consult your dealer/distributor

WARNING! Risk of Fire! DO NOT install and or use

any component not approved by Hearth & Home Tech­nologies Inc.

FULLY CLOSED

CORRECT

Figure 2.2 Operating Positions of Bi-fold Doors

PARTLY CLOSED

INCORRECT

I. Outside Air (optional)

The outside air kit supplies some fresh combustion air for
your fi replace. It may help reduce the effects of negative
air pressure. (See Section 5.D.)

• Refer to Figure 2.1 for location of control

• Close the inlet to prevent cold drafts when the fi replace
is not being used.

CAUTION! Risk of Burns! The outside air control

handle is HOT when fi replace is in operation. Adjust
BEFORE lighting fi re.

M. Clear Space

• Do not place combustible objects within 48 in. (1219 mm)
of the front of fi replace. See Figure 2.3.

WARNING! DO NOT place combustible objects in front
of the fi replace. High temperatures may ignite clothing,
furniture or draperies.

• Mantel - avoid placing candles and other heat-sensitive
objects on mantel or hearth. Heat may damage these
objects.

J. Fan Kit (optional)

• Refer to instructions included with fan kit.

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

48 in. (1219 mm)

Clear Space

Front of Fireplace

12 in. (305 mm)

Clear Space

Sides of Fireplace

(from the FP

opening)

Figure 2.3 Clear Space

9

N. Wood Fuel

Hardwood vs Softwood

Your fi replace performance depends on the quality of the
fi rewood you use.

• Seasoned wood contains about 8,000 BTUs per pound
.

• Hard woods are more dense than soft woods.

• Hard woods contain 60% more BTUs than soft woods.

• Hard woods require more time to season, burn slower
and are harder to ignite.

• Soft woods require less time to dry, burn faster and are
easier to ignite.

• Start the fi re with soft wood to bring the fi replace up to
operating temperature and to establish draft.

• Add hard wood for slow, even heat and longer burn
time.

Soft woods Hard woods

• Douglas Fir • Oak

• Pine • Maple

• Spruce • Apple

• Cedar • Birch

• Poplar

• Aspen

• Alder

Moisture

WARNING! Risk of Fire!

• DO NOT burn wet or green wood.

• Wet, unseasoned wood can cause accumulation of
creosote.

The majority of the problems fi replace owners experience
are caused by trying to burn wet, unseasoned wood.

• Wet, unseasoned wood requires energy to evaporate
the water instead of heating your home, and

• Evaporating moisture cools your chimney, accelerating
formation of creosote.

Seasoned Wood

• Cut logs to size

• Split to 6 in. (152 mm) or less

• Air dry to a moisture content of around 20%

- Soft wood - about nine months

- Hard wood - about eighteen months

NOTICE: Seasoning time may vary depending on drying

conditions.

Storing Wood

Steps to ensure properly seasoned wood:

• Stack wood to allow air to circulate freely around and
through woodpile.

• Elevate wood pile off ground to allow air circulation
underneath.

• Smaller pieces of wood dry faster. Any piece over 6 in.
(152 mm) in diameter should be split.

• Wood (whole or split) should be stacked so both ends
of each peice are exposed to air. More drying occurs
through the cut ends than the sides.

• Store wood under cover to prevent water absorbtion
from rain or snow. Avoid covering the sides and ends
completely.

WARNING! Fire Risk! DO NOT store wood:

• In front of the fi replace.

• In space required for loading or ash removal.

Processed Solid Fuel Firelogs

Manufactured fi relogs may be used with this fi replace.
Hearth & Home Technologies Inc. recommends the use of
UL Classifi ed processed fuel fi relogs. Follow the manufac-
turer’s lighting and safety instructions.

Using fi relogs may require more frequent chimney inspec-
tion and cleaning.

Do not poke or stir the logs while they are burning. Use
only fi relogs that have been evaluated for the application
in manufactured fi replaces and refer to fi relog warnings
and caution markings on packaging prior to use.

10

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

3

Maintainance and Service

3

A. Disposal of Ashes

Frequency: When they reach bottom of grate
By: Homeowner

WARNING! Risk of Fire! Ashes could contain hot em­bers.

• Place ashes in a metal container with a tight-fi tting lid.

• The closed container should be placed on a
noncombustible fl oor or on the ground, well away from
all combustible materials, pending fi nal disposal.

• If the ashes are disposed of by burial in soil or otherwise
locally dispersed, they should be retained in the closed
container until all cinders have thoroughly cooled

B. Chimney Inspection/Cleaning

Frequency: At least twice a year during heating season

or as recommended by a certifi ed chimney sweep
By: Certifi ed chimney sweep

WARNING! Risk of Fire! Ignited creosote is extremely
HOT. Prevent creosote buildup.

Refer to Figure 3.1 to remove/reinstall termination caps.

Creosote - Formation and Need for Removal

When wood is burned slowly, it produces tar and other
organic vapors, which combine with expelled moisture to
form creosote. The creosote vapors condense in the rela­tively cool chimney fl ue of a slow-burning fi re. As a result,
creosote residue accumulates on the fl ue lining. When
ignited this creosote makes an extremely hot fi re.

WARNING! Risk of Fire! A chimney fi re can permanently
damage your chimney system and nearby structures.

In the event of a chimney fi re, Hearth & Home Technolo-
gies Inc. recommends

• replacement of the chimney, and

• inspection of the adjacent structure to the provisions of
NFPA Level III inspection criteria.

The chimney shall be inspected at least twice a year
during the heating season to determine when a creosote
buildup has occurred.

When creosote has accumulated it shall be removed to
reduce the risk of a chimney fi re.

Remove screws,
lift top cover.

Top Cover

Cap

Chimney

TR344/TR342

Round

Termination Cap

Figure 3.1 Chimney & Termination Cap Cleaning

Cap

Slip
Section

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

Remove 4 screws
and lift top pan off.

ST375

Square

Termination Cap

1. Remove the 4 screws.

2. Remove the screen.

3. Remove the baffle.

Cap

Chase

TS345/TS345P

Square

Termination Caps

Remove 2 screws from
the front and back and
lift the top off.

TCT375

Terra Cotta

Termination Cap

11

C. Check Firebox Refractory

Frequency: After each ash removal
By: Homeowner

WARNING! Risk of Fire!

Crumbling, deteriorated refractory can allow overheating
of surrounding materials.

Expansion and contraction will cause minor cracking of
the refractory. This is normal. The refractory will require
periodic replacement depending on use.

The panels should be replaced if

• Cracks exceed ¼ inch (6 mm) in width,

• Metal is exposed behind the refractory,

• Large pieces of refractory fall out.

Inspect fi replace refractory.

D. Inspect Grate

Frequency: After each ash removal
By: Homeowner

Inspect grate for:

• Warping or sagging 1-1/2 in. (38 mm) or more

• Broken welds

• Burn-through of grate bars
For safe operation, replace only with an approved grate

from Hearth & Homes Technologies Inc.

E. Glass Cleaning

Frequency: As desired
By: Homeowner

CAUTION! Handle glass assembly with care. Glass is
breakable.

• Avoid striking, scratching or slamming glass

• Avoid abrasive cleaners

• DO NOT clean glass while it is hot

Clean glass with a non-abrasive commercially available
cleaner or ashes:

• Light deposits

- Use household glass cleaner

• Heavy deposits

- Use wood ash on damp cloth or,

- Use commercial fi replace glass cleaner (consult with
your dealer)

12

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

4

Troubleshooting Guide

4

Start Fire Problems Possible Cause Solution

Can’t get fi re started
Excessive smoke or spillage
Burns too slowly
Smolders, sizzles

Not enough kindling/paper or no
kindling/paper

Damper closed/not fully open Open damper.

Not enough air for fi re to ignite Check for restricted cap/shroud.

Wood condition is too wet, too
large

Use dry kindling, more paper. Arrange kindling &
wood for air movement.

Open air kit (if installed).

Check for fl ue blockage.

Pre-warm fl ue before starting fi re (refer to starting
fi re section).

Check for adequate vent height (refer to chimney
assembly section).

Open window below the fi replace towards the
wind.

Use dry, seasoned wood (refer to wood fuel
section).

Bed of coals not established
before adding wood

Flue blockage such as birds’
nests or leaves in termination
cap

Down draft or negative pressure
Competition with exhaust
devices

Fire burns too fast Extremely dry or soft wood Mix in hardwood.

No glass doors Add glass doors to slow down air fl ow.

Overdrafting Check for correct vent height; too much vertical

Start with paper & kindling to establish bed of
coals (refer to starting fi re section).

Have chimney inspected for creosote and cleaned
by a certifi ed chimney sweep.

Do not use exhaust fans during start-up (refer to
negative pressure section).

Open window below the fi replace towards the
wind.

Mix in less seasoned wood after fi re is established
(refer to wood fuel section).

height creates overdrafting.

Check location of vent termination (refer to
chimney assembly section).

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

13

5

Installer Guide

Getting Started

5

A. Typical Fireplace System

Additional lateral
support for chimney
above roof (or enclosed
in chase) if needed
(Section 8)

Non-combustible
roof flashing maintains
minimum clearance
around chimney

Support straps
on rafter support
chimney (not shown)

Ceiling firestop
on floor of attic
(Section 8)

Chimney system
(Section 8)

Combustible framing/header
on top of V-shaped standoffs
(Section 6)

Chimney Air Kit
(Section 8)
Required in
Canada. Outlet
must be no
less than 6 ft.
(1.83m) off
ground level.

Outside
combustion air
(Section 7)

Protective metal
hearth strip(s)
(Section 7)

NOTICE:

• Illustrations and photos reflect typical installations
and are for design purposes only.

• Illustrations/diagrams are not drawn to scale.

• Actual product may vary from pictures in manual.

Termination cap
(Section 8 & 9)

Storm Collar
(Section 8)

Chimney penetrates roof
preferably without affecting
roof rafters (Section 8)

Offset & Return (with hanger straps)
(Section 8)

Attic insulation shield (not shown)
must be used here to keep
insulation away from chimney
if attic is insulated (Section 8)

Framing headed off
in ceiling joists
(Section 8)

Enclosed space above
and around fireplace

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

)

(Section 6)

Mantel and surround
(Section 11)

Decorative facing
and trim
(Section 11)

Hearth extension
(Section 11)

Factory-built fireplace

Figure 5.1 Typical Fireplace System

14

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

D. Negative PressureB. Design and Installation Considerations

NOTICE: Check building codes prior to installation.

• Installation MUST comply with local, regional, state and
national codes and regulations.

• Consult insurance carrier, local building inspector, fi re
offi cials or authorities having jurisdiction over restrictions,
installation inspection and permits.

Before installing, determine the following:

• Where the fi replace is to be installed.

• The vent system confi guration to be used.

• Gas supply piping.

• Electrical wiring.

• Framing and fi nishing details.

• Whether optional accessories—devices such as a fan,
wall switch or remote control —are desired.

C. Draft

Draft is the pressure difference needed to vent fi replaces
successfully. When a fi replace is drafting successfully, all
combustion byproducts are exiting the home through the
chimney.

Considerations for successful draft include:

• Preventing negative pressure

• Location of fi replace and chimney

NOTICE: Hearth & Home Technologies assumes no
responsibility for the improper performance of the fi replace
system caused by:

• Inadequate draft due to environmental conditions

• Downdrafts

• Tight sealing construction of the structure

• Mechanical exhausting devices

• Improper location of the chimney

WARNING! Risk of Asphyxiation! Negative pressure
can cause spillage of combustion fumes and soot. Fire
must draft properly for safe operation.

Negative pressure results from the imbalance of air avail­able for the fi replace to operate properly. It can be stron-
gest in lower levels of the house.

Causes include:

• Exhaust fans (kitchen, bath, etc.)

• Range hoods

• Combustion air requirements for furnaces, water heaters
and other combustion appliances

• Clothes dryers

• Location of return-air vents to furnace or air
conditioning

• Imbalances of the HVAC air handling system

• Upper level air leaks such as:

- Recessed lighting

- Attic hatch

- Duct leaks

To minimize the effects of negative air pressure:

• Install the outside air kit with the intake facing prevailing
winds during the heating season

• Ensure adequate outdoor air for all combustion
appliances and exhaust equipment

• Ensure furnace and air conditioning return vents are not
located in the immediate vicinity of the fi replace

• Avoid installing the fi replace near doors, walkways or
small isolated spaces

• Recessed lighting should be a “sealed can” design

• Attic hatches weather stripped or sealed

• Attic mounted duct work and air handler joints and seams
taped or sealed

• Basement installations should be avoided

NOTICE: Hearth & Home Technologies Inc. recommends

the use of direct vent fi replaces in basements.

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

15

E. Locating Fireplace & Chimney

Location of the fi replace and chimney will affect perfor-
mance.

• Install through the warm airspace enclosed by the
building envelope. This helps to produce more draft,
especially during lighting and die-down of the fi re.

• Penetrate the highest part of the roof. This minimizes
the effects of wind loading.

• Locate termination cap away from trees, adjacent
structures, uneven roof lines and other obstructions.

• Minimize the use of chimney offsets.

• Consider the fi replace location relative to fl oor and ceiling
and attic joists.

• Take into consideration the termination requirements in
Section 8 and Section 9.

NOTICE: Locating the fi replace in a basement or in a location
of considerable air movement can cause intermittent smoke
spillage from fi replace. Do not locate fi replace near

• frequently open doors

• central heat outlets or returns

Location NOT recommended:

• Not the highest point of the roof

• Wind loading possible

Windward

Recommended Location:

• Above peak

Marginal Location:

• Below peak

Recommended:

• Insulated exterior chase
in cooler climates

Recommended Location:

• Above peak

• Inside heated space

Marginal Location:

• Wind loading possible

Location NOT recommended:

• Too close to tree

• Below adjacent structure

• Lower roof line

• Avoid outside wall

Leeward

Multi-level Roofs

Figure 5.2 Recommended Chimney Locations

16

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

F. Tools and Supplies Needed H. Inspect Fireplace and Components

Before beginning the installation be sure the following
tools and building supplies are available:

Reciprocating saw Framing material

Pliers High temp caulking material

Hammer Gloves

Phillips screwdriver Framing square

Flat blade screwdriver Electric drill and bits

Plumb line Safety glasses

Level Tape measure

1/2-3/4 in. length, #6 or #8 self-drilling screws

Misc. screws and nails

G. Typical Fireplace System

This fi replace system requires:

• Fireplace/integral grate/refractory/outside air system

• Chimney system and termination cap

• Hearth extension

WARNING! Risk of Fire and/or Explosion! Damaged
parts could impair safe operation. DO NOT install dam­aged, incomplete or substitute components. Keep fi re-
place dry.

• Remove fi replace and components from packaging and
inspect for damage.

• Vent system components and doors are shipped in
separate packages.

• Report to your dealer any parts damaged in shipment.

• Read all the instructions before starting the
installation. Follow these instructions carefully
during the installation to ensure maximum safety
and benefi t.

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

17

6

Framing & Clearances

6

A. Select Fireplace Location

F

E

B

C

D

As a
room
divider

B

A

48 in.

(1219 mm)

minimum

H

Across a
corner

G

B
A

In an exterior chase
or projecting into a
garage

Along a wall

A

B

3/4 in. (19 mm) min. air

Note:

G

H

H

G

space from fireplace to
combustible materials. 1/2
in. (13 mm) allowed at
nailing flanges.

In addition to these

Note:

framing dimensions, also
reference the following
sections:

• Clearances (Section

6.B.)

• Mantel Projections
(Sections 11.E. & 11.F.)

• Fireplace Dimensions
(Section 13.A.)

5/8 in. (16 mm) all
configurations

Note: Measurements are FRAMING dimensions only and do
not include drywall either in the cavity or on the interior walls.

Model # A B C D E F G H

A36

A42

Figure 6.1 Fireplace Locations (Framing dimensions shown)

18

in. 51 43 74 7/8 35 3/4 15 3/4 53 23 12 in. (305 mm)

mm 1295 1092 1902 908 400 1346 584

in. 57 49 77 1/2 38 7/8 18 54 7/8 23

mm 1448 1245 1969 987 457 1394 584

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

Minimum from FP

opening to any

perpendicular wall.

B. Clearances

WARNING! Risk of Fire! You must comply with all minimum air space clearances to combustibles as specifi ed in Fig-
ure 6.2. DO NOT pack required air spaces with insulation or other materials.

Storm Collar

(roof)

Roof Flashing

Shaded areas

represent

2 in. (51 mm) min.

air space clearance

required around pipe

(insulation)

2 in. (51 mm) min.

Ceiling Firestop

Adapter attached here

(not shown)

48 in.

1219 mm

Combustible Object

(attic)

0 in.

to floor

Attic

Insulation

Shield

(ceiling)

Offset/Return (secured

with hanger straps)

(ceiling)

Must have 2 in. (51 mm)

minimum clearance

to header

0 in. to level

of standoffs

3/4 in. (19 mm) to back &

sides of appliance

(except at nailing flanges

where it is 1/2 in. [13 mm])

Figure 3.2 Clearances to Combustible Materials

Note: Chimney air kit not shown, but required in Canada.

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

19

C. Sidewalls/Surrounds

• Adjacent combustible sidewalls must be located a minimum of 12 in. (305 mm) (may be 24 in) from the fi replace
opening.

• Combustible and noncombustible mantel legs, surrounds and stub walls may be constructed per Figure 6.3.

A

10 3/4 in.
[273 mm]

FLUSH
FRONT

Grid represents 1 in. scale

50° angle

Model #

4 in.

BRICK

FRONT

A

39° angle

[102 mm]

9 3/4 in.

[248 mm]

A36

A42

Fireplace OpeningBOutside Dimensions

in. 36 42

mm 914 1067

in. 42 48

mm 1067 1219

B

12 in.

[305 mm]

Figure 6.3 Mantel Leg or Wall Projections (Acceptable on both sides of opening)

12 in.

[305 mm]

D. Frame the Fireplace

Figure 6.4 shows typical framing using combustible materials (2x4 lumber shown).

• Observe all required air space clearances to combustible materials as shown in Figure 6.2.

• Framing across the top of fi replace must be above top standoffs.

2 in. (51 mm)
min. air space
clearance
from chimney.

C

B

Header MUST NOT be notched!

D = extra space needed for outside air connection.
If outside air duct has no bend, this dimension may be
reduced as long as minimum clearances are met.

D

A

Model # A B* C** D

A36

A42

* If interior of chase will be drywalled, add the thickness to this measurement.

** Adjust header height for a raised fl oor under fi replace.

in. 43 23 41 1/2 8

mm 1092 584 1054 203

in. 49 23 41 1/2 8

mm 1245 584 1054 203

Figure 6.4 Framing the Fireplace

Î

20

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

7

Installation of Fireplace

7

CAUTION! Risk of Cuts/Abrasions. Wear protective
gloves and safety glasses during installation. Sheet metal
edges are sharp.

A. Things to Consider

• Location of chimney air kit (see Figure 7.4)

• Location(s) of outside air kit

• Electrical connections and/or wall switch

• Gas line piping

B. Position the Fireplace

• Place the fi replace on a continuous fl at surface.

• Follow framing instructions in Section 6.

WARNING! Risk of Fire! Prevent contact with sag-

ging, loose insulation.

• DO NOT install against vapor barriers or exposed

insulation.

• Secure insulation and vapor barriers.

• Provide minimum air space clearances at the sides

and back of the fi replace assembly as outlined in
Section 6.

1 in. (25 mm)
overlap

Protective metal strips are placed 2 in. (51 mm) under the
front of the fireplace and must extend beyond the front
and sides of fireplace opening by 2 in. (51 mm).

Figure 7.1 Position the Protective Metal Hearth Strips

C. Place Protective Metal Hearth Strips

WARNING! Risk of Fire! Protective metal hearth strips
MUST be installed. Sparks or embers may ignite fl ooring.

• Refer to Figures 7.1 and 7.2.

• Locate the two protective metal hearth strips measuring
approximately 26 in. x 4 in. (660 mm x 102 mm) included
with this fi replace.

• Slide each metal strip 2 in. (51 mm) under front edge of
fi replace.

• Overlap strips in the middle of fi replace opening by 1 in.
(25 mm) minimum..

• Metal strips must extend beyond the front and sides of
the fi replace opening by at least 2 in. (51 mm).

• Protect the front of a platform elevated above the hearth
extension with metal strips (not included with fi replace)
per Figure 7.2. See Section 11 for hearth extension
instructions.

D. Level Fireplace

• Level fi replace side-to-side and front-to-back.

• Shim with non-combustible material as necessary.

• Secure fi replace to framing with nailing fl anges with a
minimum of two fasteners per nailing fl ange.

• Check fi replace opening for square to ensure proper fi t
of glass doors. Measure diagonals of fi replace opening
to make sure they are equal.

Top piece must overlap

bottom piece

Raised Platform

2 in.

(51 mm)

Floor

2 in.

(51 mm)

Figure 7.2 Protect the Front of an Elevated Platform

1 in. (25 mm) min.

overlap

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

21

3 ft min. from
top of uppermost
chimney section
to air inlet.

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)

)

)

)

)

)

)

)

)

)

)

Note: Chimney air kit
not shown, but required
in Canada.

Figure 7.3 Possible Outside Air Inlet Locations

NO

NO

Outlet blocked by

snow, leaves, etc.

Garage or

combustible

liquids storage

YES

Clear area

outside

house or in

ventilated

crawl space

Figure 7.4 Outside Combustion Air Placement

22

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

NO

Attic space

NO

Outlet placed

higher than 3 ft

below the

termination cap

Factory-built

fireplace

E. Install Outside Air Kit

• Keep duct runs short and straight to minimize restriction.
A small dip is acceptable for a cold air trap.

• The outside air kit must be installed on the left hand side
of the fi replace.

• Locate the air inlet in a clear area, preferably into
prevailing wind during the heating season. Refer to
Figure 5.2.

• Install as shown in Figures 7.3, 7.4 and 7.5.

• The air duct may be run vertically.

• The outside air inlet must be at least 3 ft (.91 m) below
the top of the uppermost chimney section.

CAUTION! Risk of Fire or Asphyxiation! DO NOT

draw outside combustion air from wall, fl oor or ceiling
cavity, or enclosed spaces such as an attic or garage.

• DO NOT place outside air inlet close to exhaust

vents or chimneys. Fumes or odor could be drawn
into the room through the fi replace.

• Locate outside air inlet to prevent blockage from

leaves, snow/ice, or other debris. Blockages could
cause combustion air starvation.

Flexible Duct

(not supplied)

Outside Air

Outside Air

Hood

• Hearth & Home Technologies Inc recommends using
UL181 Class 0 or Class I rigid or flexible ducting.

• Secure flex duct with metal tape, screws or wire ties.

Figure 7.5 Outside Air Installation

2 Wire Ties

Plate

Assembly

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

23

8

Chimney Assembly

8

NOTICE: Chimney performance may vary.

• Trees, buildings, roof lines and wind conditions affect
performance.

• Chimney height may need adjustment if smoking or
overdraft occurs.

Chimney must extend
beyond combustible
roof structure

Maintain minimum
height of chimney
above roof

Install roof flashing
according to minimum
requirements

Offsets/returns
may not exceed
30° from vertical

Lock chimney
sections together
firmly to resist
movement

Termination Cap

Additional
support for
tall chimneys

Storm Collar

Maintain minimum
clearances to
combustibles as
specified

Support straps for returns
must be secured to
adequate framing

Offsets and returns must
be secured with the screws
provided (outer pipe only)

24

Ceiling firestops
are required where
chimney passes
through ceiling or
floor

Figure 8.1 Typical Chimney System - Guidelines for Chimney System Installation

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

A. Chimney Requirements

Measure vertical distances from the base of the fi replace
as shown in Figure 8.2.

• Minimum overall straight height 16.5 ft (5.03 m)

• Minimum height with offset/return 16.5 ft (5.03 m)

• Maximum height 90 ft (27.43 m)

• Maximum chimney length between an offset
and return

• Maximum distance between chimney
stabilizers

• Double offset/return minimum height 20 ft (6.1 m)

• Maximum unsupported chimney length
between the offset and return

• Maximum unsupported chimney height above
the fi replace

• Maximum unsupported chimney above roof 6 ft (1.83 m)

20 ft (6.1 m)

35 ft (10.67 m)

6 ft (1.83 m)

35 ft (10.67 m)

WARNING! Risk of Fire! You must maintain 2 in. (51
mm) air space clearance to insulation and other combus­tible materials around the chimney system. Failure to do
so may cause overheating and fi re.

Table 8.1

Determine the chimney components needed to complete
your particular installation:

• Measure the total vertical height of the fireplace
installation from the base of the fi replace assembly to
the approximate location of the bottom of the termination
cap.

• Subtract the effective height of the fi replace assembly
(see Figure 8.2) from the total vertical height to determine
the overall height of the chimney installation.

• Create a schematic for your application similar to Figure

8.2 showing components required (referring to Table

8.1). Figure 8.1 identifi es those components and where
used.

• Install a ceiling fi restop whenever the chimney penetrates
a fl oor/ceiling.

NOTICE: A maximum of two pairs of offsets and returns

may be used.

CAUTION! Risk of Fire and/or Asphyxiation! DO

NOT connect this fi replace to a chimney fl ue servicing

another appliance. DO NOT connect to any air distribu­tion duct or system. These actions could cause over­heating/fi re in the chimney fl ue, or release of exhaust
fumes into the living areas.

HEIGHT OF CHIMNEY COMPONENTS in. mm

Chimney Stabilizer

SL3 4-3/4 121

Ceiling Firestops

FS338 0 0

FS339 0 0

FS340 0 0

Offsets/Returns

SL315 13-3/8 340

SL330 15-1/2 394

Roof Flashing

RF370 0 0

RF371 0 0

Chimney Sections*

SL306 4-3/4 121

SL312 10-3/4 273

SL318 16-3/4 425

SL324 22-3/4 578

SL336 34-3/4 883

SL348 46-3/4 1187

* Dimensions refl ect effective height.

6 ft (1.83 m) max.
unsupported chimney
above roof

20 ft (6.10 m) max.
pipe between an
offset & return

Ceiling firestop

35 ft (10.7 m)

max. straight

unsupported

chimney height

41-1/4 in.

(1048 mm)

Effective

Height

Figure 8.2 Chimney Requirements

16.5 ft (5.03 m) min. height/single offset-return
20 ft. (6.10 m) min. height/double offset-return

90 ft (27.4 m) max. height

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

25

B. Using Offsets/Returns

• Use an offset/return to bypass overhead obstructions.

• An offset and return can be used as a single entity or separated by chimney section(s).

WARNING! Risk of Fire! DO NOT use offset/returns greater than 30°. Chimney draft will be restricted and could cause

overheating and fi re.

• Measure the shift needed to avoid the overhead obstruction. Refer to dimension A in Figure 8.3.

• Find the appropriate A dimension listed in Table 8.2.

• The B dimension coinciding with the A dimension measurement in Table 8.2 represents the required vertical clearance
needed to complete the offset/return.

• Read across the chart to fi nd the number of chimney sections/model numbers needed between the offset and return.

A

Example:

Your “A” dimension from Figure 8.3 is 14 1/2 in. (368
mm). Using Table 8.2 the dimension closest to, but
not less than 14 1/2 in. (368 mm) is 14 1/2 in. (368
mm) using a 30° offset/return.

B

You determine from the table that you need 34 1/8 in.
(867 mm) (Dimension “B”) between the offset and
return.

1-1/4 in. (32 mm)

OVERLAP

Figure 8.3 Chimney Offset/Return

The chimney component that best fi ts your applica-
tion is one SL324.

Table 8.2

15-degree

A

Offset

in. mm in. mm in. mm in. mm

1-5/8 41 13-3/8 340 - -----3-5/8 92 15-1/2 394

2-7/8 73 17-3/4 451 1 -----5-1/2 140 18-5/8 473

4-1/8 102 22-3/8 568 2 -----7-1/4 184 21-3/4 552

4-1/2 114 23-5/8 600 - 1 - - - - 8-1/2 216 23-3/4 603

5-3/4 146 28-1/4 718 1 1 - - - - 10-1/4 260 27 686

6 152 29-3/8 746 - - 1 - - - 11-1/2 292 29 737

7-1/4 184 34 864 - 2 - - - - 13-1/4 337 32-1/8 816

7-3/4 197 36-1/8 918 - - - 1 - - 14-1/2 368 34-1/8 867

8-3/4 222 39-3/4 1010 1 - - 1 - - 16-1/4 413 37-3/8 949

10-3/8 264 45-5/8 1159 - - 2 - - - 19-1/4 489 42-1/2 1080

10-5/8 270 46-3/4 1187 - - - - 1 - 20-1/2 521 44-5/8 1133

11-7/8 302 51-3/8 1305 1 - - - 1 - 22-1/4 565 47-3/4 1213

13-1/2 243 57-1/4 1454 - - - 2 - - 25-1/4 641 52-7/8 1343

13-3/4 349 58-3/8 1483 - ----126-1/2 673 55 1397

15 381 63 1600 1 ----128-1/4 718 58-1/8 1476

16-1/2 419 68-3/4 1746 - 1 - - - 1 31-1/4 794 63-1/4 1607

18 457 74-5/8 1895 - - 1 - - 1 34-1/4 870 68-1/2 1740

19-5/8 498 80-3/8 2042 - - - 1 - 1 37-1/4 946 73-3/4 1873

20-5/8 524 84-1/8 2137 1 - - 1 - 1 39-1/8 994 76-7/8 1953

22-3/4 578 91-7/8 2334 - - - - 1 1 43-1/4 1099 84-1/8 2137

24 610 96-1/2 2451 1 - - - 1 1 45-1/8 1146 87-1/4 2216

25-7/8 657 103-1/2 2629 - ----249-1/4 1251 94-1/2 2400

Proper assembly of air-cooled chimney parts result in an overlap at chimney joints of 1-1/4 in. (32 mm). Effective length is built
into this chart.

B

Height

SL306 SL312 SL318 SL324 SL336 SL348

A

Offset

30-degree

B

Height

26

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

C. Assembling Chimney Sections

WARNING! Risk of Fire! DO NOT install substitute or
damaged chimney components.

• Use only those components described in this manual.

Substitute or damaged chimney components could impair
safe operation and cause overheating and fi re.

• Support the pipe during construction and check to be
sure inadvertent loading has not dislodged the chimney
section from the fi replace or at any chimney joint.

• Attach a straight chimney section or an offset to the top
of the fi replace.

• Place inner fl ue to the inside of the chimney section below
it. Place the outer casing outside the outer casing of the
chimney section below it. Refer to Figure 8.4.

NOTICE: Chimney sections cannot be disassembled

once locked together. Plan ahead!

• Lock chimney sections and/or offsets/returns together by
pushing downward until the top section meets the stop
bead on the lower section.

• Pull on the top section to make sure it is fully engaged
and will not separate.

• You may use #6 or #8 sheet metal screws no longer than
1/2 in. (13 mm) to fasten chimney sections together. Do
not penetrate inner fl ue.

WARNING! Risk of Fire! You MUST use screws (pro-

vided) to fasten offset/returns to chimney sections to
keep the chimney parts from twisting. Failure to do so
could cause fi re.

• Fasten offset/returns to chimney sections. Insert the
screws (provided) through the predrilled holes. Do not
penetrate inner fl ue.

• Secure chimney returns with hanger straps provided;
fasten to studs or joists.

• Vertical straight runs of chimney must be supported every
35 ft (10.7 m).

D. Install Chimney Air Kit

• Required in Canada.

• Follow instructions provided with this accessory.

E. Installing Ceiling Firestops

CAUTION! Risk of Fire! Ceiling fi restops must be used
whenever the chimney penetrates a ceiling/fl oor.

• Chase construction requires ceiling fi restops at
each fl oor or every 10 ft (3.05 m) of clear space.

• The ceiling fi restop slows spread of fi re and reduc-
es cold air infi ltration.

• Install a ceiling fi restop whenever chimney penetrates

ceiling/fl oor.

• Mark and cut an opening in ceiling as shown in

Figure 8.5.

• Frame the opening with the same size lumber used in

the ceiling joists.

• Nail the ceiling fi restop to the bottom of the ceiling joists

when there is a room above.

• Use an attic insulation shield if the ceiling is insulated.

The ceiling fi restop may then be attached above or below
the joists.

WARNING! Risk of Fire! DO NOT seal area between

fi restop opening and chimney pipe. Restricting air fl ow
around chimney may cause fi re.

ROOM ABOVE (non-insulated ceiling)

B

A

Ceilng firestop from

bottom

Figure 8.4 Assembling Chimney Sections

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

ATTIC ABOVE (insulated ceiling)

Ceiling firestop from

top

Note:

Use same dimensional lumber for framing

ceiling firestop and joists.

AB

Catalog #

FS338 14-1/2 368 14-1/2 368 0°

FS339 14-1/2 368 18-3/8 467 15°

FS340 14-1/2 368 23 584 30°

Figure 8.5 Installing the Ceiling Firestop

Anglein. mm in. mm

27

F. Installing Attic Insulation Shield

WARNING! Risk of Fire! You MUST install an attic insu­lation shield when there is any possibility of insulation or
other combustible material coming into contact with the
chimney.

• DO NOT pack insulation between the chimney and the
attic insulation shield.

• Failure to keep insulation and other materials away from
chimney pipe could cause fi re.

• DO NOT offset chimney inside insulation shield.

Installation of a ceiling fi restop is required

• Refer to Figures 8.6 - 8.8.

• Roll the shield (around the chimney if already installed)
until you have a 3 in. (76 mm) overlap and the three
holes on each side match up (large holes on top).

• Insert three screws into the matching holes to form a
tube.

• Bend three tabs on the bottom of the tube inward to 90°
to maintain chimney air space as shown in Figure 8.6.

• Rest the insulation shield on the ceiling fi restop below.

• Bend the three short tabs at the top of the shield inward
to 90° to maintain the 2 in. (51 mm) air space from the
chimney.

• Bend the remaining top tabs to just meet the pipe.

Bend remaining tabs
to rest against pipe to

Bend inward

90°

prevent insulation
from falling in.

Insert three

3 in. (76 mm)

overlap

Figure 8.6 Prepare Attic Insulation Shield

Pipe

6 Tabs bent

in 90°

rest against pipe

screws

Tabs bent in to

Attic Insulation Shield

14-1/2 in. (368 mm)

diameter

Ceiling Firestop

If you wish to make a custom shield or barrier, follow
these guidelines:

• Metal is preferred, although any material stiff enough to
hold back the insulation can be used.

WARNING! Risk of Fire! Use of cardboard or other

materials that can defl ect under humidity or other envi-
ronmental conditions is not recommended.

• The shield or barrier must be tall enough to extend
above the insulation and prevent blown-in insulation
from spilling into the cavity.

• Maintain specifi ed air spaces around chimney.

• Check instructions and local codes for further details.

Insulation

10-1/2 in.
(267 mm)

Figure 8.7 Install Attic Insulation Shield (fi restop above ceiling)

10-1/2 in.
(267 mm)

Pipe

Pipe

6 Tabs bent

in 90°

Pipe

Insulation

Tabs bent in to

rest against pipe

Attic Insulation Shield

14-1/2 in. (368 mm)

diameter

InsulationInsulation

Ceiling Firestop

28

Figure 8.8 Install Attic Insulation Shield (fi restop below ceiling)

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

G. Cut out Hole in Roof

• Refer to Figure 8.9.

• Plumb from roof to center of chimney.

• Drive a nail up through roof to mark center of pipe.

• Measure to either side of nail and mark the 14-1/2 in. x
14-1/2 in. (368 mm x 368 mm) opening required.

• Measure opening on the horizontal; actual length may
be larger depending on roof pitch.

• Cut out and frame opening.

• Refer to Chapter 25 of the Uniform Building Code for
roof framing details.

H. Complete Installation

WARNING! Risk of Fire! You MUST maintain 2 in.
(51 mm) air space to insulation and other combustible
materials around the chimney system. Failure to do so
could cause overheating and fi re.

• Keep chimney sections from separating or twisting.

• You may secure straight chimney sections at the joints
with screws no longer than 1/2 in. (13 mm).

The following steps should be skipped if using a

chase.

• Install roof fl ashing appropriate to roof pitch.

• Install round termination cap and storm collar following
instructions shipped with the cap.

I. Install Flashing

• Assemble chimney so it passes through the framed
opening.

• Slip the fl ashing over the chimney.

NOTICE: Roofi ng shingles must be below the fl ashing

plate on the lower side of a sloped roof and over the
fl ashing plate on the sides and top.

• Nail the fl ashing to the roof. Keep gaps between the
fl ashing plate and the roof to a minimum.

• Caulk the fl ashing plate and roof junction as well as the
vertical seam on the fl ashing. All nail heads must be
caulked with a roofi ng sealant.

Figure 8.9 Ceiling/Attic Construction

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

29

J. Chimney Termination Requirements

• Install a cap approved and listed for this fi replace system.

• Locate cap where it will not become plugged by snow or other materials.

• Locate cap away from trees or other structures.

• The bottom of the termination cap must be at least 3 ft (.91 m) above the roof AND at least 2 ft (.61 m) above any portion
of roof within 10 ft (3.05 m) as shown in Figure 8.10.

• The distance required between caps is shown in Figure 8.10.

Slanted Roofs

Chimney must extend 2 ft (.6 m)

Chimney must
extend 3 ft (.9 m)
above the roof

above any portion of the roof or
adjacent structures within
10 ft (3 m) of the chimney

Flat Roofs

Chimney must
extend 3 ft (.9 m)
above the roof

Multiple Chimney Locations

AB

6in.(minimum)upto20in.

152 mm/508 mm

20 in. and over 0 in. minimum

18 in. minimum

457 mm

Gas

Termination

Cap **

Chimney must extend 2 ft (.6 m)
above any portion of the roof or
adjacent structures within
10 ft (3 m) of the chimney

Gas, Wood or Fuel Oil

Termination Cap

B

A *

Wood

Minimum

(See

illustration

above)

Perpendicular Wall

Figure 8.10 Multiple Chimney Locations

Î

30

Ifusingdecorativecapcover(s),thisdistancemayneedtobe

*

increased. Refer to the installation instructions supplied with the
decorative cap cover.

In a staggered installation with both gas and wood terminations, the

**

wood termination cap must be higher than the gas termination cap.

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

9

Chase Installations

9

A. Construct the Chase

A chase is a vertical boxlike structure built to enclose the
fi replace and/or its vent system. Vertical chimneys that
run on the outside of a building must be installed inside a
chase.

Construction of the chase may vary with the type of build­ing. These instructions are not substitutes for the require­ments of local building codes. Local building codes MUST
be checked.

A chase should be constructed in the manner of all
outside walls of the home to prevent cold air drafting
problems. The chase should not break the outside build­ing envelope in any manner. All outer walls need to be
insulated.

Building codes require false ceiling and ceiling fi restops
at each fl oor of the chase or every 10 ft (3.05 m) of clear
space to control spread of fi re.

Walls, ceiling, base plate and cantilever fl oor at the fi rst
level of the chase should be insulated. See Figure 9.1.
Vapor and air infi ltration barriers should be installed in the
chase as per regional codes for the rest of the home. Ad­ditionally, Hearth & Home Technologies recommends that
the inside surfaces be sheet rocked and taped (or the use
of an equivalent method) for maximum air tightness.

Gas line holes and other openings should be caulked with
high temperature caulk or stuffed with unfaced fi berglass
insulation. If the fi replace is being installed on a cement
slab, we recommend that in cold climates, a sheet of
plywood or other raised platform be placed underneath to
prevent conducting cold up into the room.

Three examples of chase applications are shown in Fig­ure 9.2.

1. Fireplace and chimney enclosed in an exterior chase.

2. Chimney offset through exterior wall and enclosed in chase.

3. Chase constructed on roof.

Note: In cooler climates, all chase walls should be insulated.

1 2 3

Round Termination Cap

Metal Chase Top

Firestop

False Ceiling

Tabs

Insulation

False Ceiling

Spacer

Attic

Insulation

Shield

Firestop

Spacer

Insulation

False Ceiling

Chimney

Insulation in the

outside walls

of the chase

Figure 9.2 Chase Constructions

WARNING! You must install false ceilings and ceiling

fi restops at each fl oor of the chase or every 10 ft (3.05 m)
to control spread of fi re.

WARNING! Risk of Fire! DO NOT seal area between fi re
stop opening and chimney pipe. Restricting air fl ow around
chimney may cause fi re.

WARNING! Risk of Fire! You must maintain a minimum
2 in. (51 mm) air space clearance to insulation and other
materials surrounding the chimney system.

• Insulation and other materials must be fi rmly secured to
prevent accidental contact with chimney system.

• The chase must be properly blocked to prevent blown
insulation or other combustibles from entering and
making contact with fi replace or chimney.

• Failure to prevent contact between insulation or other
materials and chimney system may cause overheating
and fi re.

Figure 9.1 Chase Assembly

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

31

B. Install Fireplace & Chimney

Install as per Sections 7 and 8.

C. Install Chase Top

• You MUST use a chase top in a chase installation. Chase
tops are available from your Heatilator dealer or may be
fi eld constructed.

• Include a turndown and drip edge to prevent water from
seeping into the chase.

• Include a 2 in. (51 mm) soldered, welded or spun collar
around pipe opening to keep water out.

• Provide a 1/8 in. (3 mm) gap around the fl ue pipe.

• Slope the chase top downward away from the
opening.

WARNING! DO NOT caulk the pipe to the chase top
collar. Restricting air fl ow around chimney may cause
fi re.

• Caulk all seams to prevent leaks.

• Refer to Figure 9.3.

Slope Downward
(1/4 in. per foot
minimum)

Figure 9.3 Chase Top Construction

2 in. (51 mm) Collar
on Chase Top

Turn-down

Drip Edge

Chase

.018 (26 ga) min.
Galvanized
Chase Top

32

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

D. Install Termination Cap

Install the chimney sections up through the chase enclo­sure.

• Refer to termination cap instructions.

WARNING! Risk of Fire! The minimum overlap of cap

to pipe (as shown in the following illustrations) MUST
be met or chimney may separate from cap. Separation
allows sparks, heat and embers to escape.

NOTICE: Paint the termination cap with a rust-resistant

paint to protect against the effects of corrosion on those
parts exposed to the weather.

• TR344 Round Termination Cap

Termination

Cap

Slip

storm collar

around chimney pipe

before termination

cap pipe is snapped

into the chimney

pipe.

Caulk gaps between

storm collar & pipe,

and storm collar

& chase top.

Collar

2 in. (51 mm)

Minimum Height

Chase Top

Storm
Collar

Chimney

Pipe

Do NOT

block air holes

6 in. (153 mm)

Minimum top of

chase to top of

chimney pipe

• TR342 Round Telescoping Termination Cap

Assemble

storm collar

around extended

termination cap

pipe

once cap is

installed.

Caulk gaps between

storm collar & pipe,

and storm collar

& chase top.

Collar

2 in. (51 mm)

Minimum Height

Chase Top

Termination cap pipe and chimney section must overlap 1-1/2 in. (38 mm)

Figure 9.5 Installing a TR342 Round Telescoping Termination
Cap

Termination

Cap

Storm
Collar

Chimney

Pipe

Do NOT

block air

holes

3 clip brackets.

Slip over chase collar

and attach with screws

provided.

14 1/2 in. (368 mm)

Maximum

Chase

• ST375 Square Termination Cap

Chase

Termination cap pipe and chimney section must be snapped
together to maintain an overlap of 1-1/2 in. (38 mm).

Figure 9.4 Installing a TR344 Round Termination Cap

Place waterproof
caulk or sealer under
each flange of the
termination cap and
on top of each screw
to help prevent leaks.

Termination Cap

Collar

2 in. (51 mm)

Minimum Height

Chase Top

Chimney

Pipe

Termination cap pipe and chimney section must overlap 1-1/2 in. (38 mm)

Flange

4 3/4 in. (121 mm)

Maximum

top of chase to

top of

chimney section

Chase

Figure 9.6 Installing an ST375 Square Termination Cap

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

33

• TS345/TS345P Square Termination Cap

Place waterproof
sealer under each
flange of the termina­tion cap and on top of

Termination Cap

Collar

2 in. (51 mm)

Minimum Height

Chase Top

Chimney

Pipe

Termination cap pipe and chimney section must overlap 1-1/2 in. (38 mm).

each screw to help
prevent leaks.

3 in. (76 mm)

Maximum

top of chase to

top of

chimney section

Chase

Figure 9.7 Installing a TS345/TS345P Square Termination Cap

• TCT375 Terra Cotta Cap

Place waterproof
sealer under each
flange of the termina­tion cap and on top of
each screw to help
prevent leaks.

Termination Cap

The last section of pipe
must stop between 2 in.
(51 mm) above top of

Collar

2 in. (51 mm)

Minimum Height

Chase Top

Chimney

Pipe

chase and 7 in. (178
mm) below top of chase

2 in. (51 mm)

7 in. (178 mm)

Chase

Termination cap pipe and chimney section must overlap 1-1/2 in. (38 mm)

Figure 9.8 Installing a TCT375 Terra Cotta Cap

34

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

10

10

Shrouds

A. Radiation Shield

Ø 17 1/2 in. (444.5 mm) Round Hole to fit over cap

• Some shrouds require a radiation shield. Use where
specifi ed.

B. Field Constructed Shrouds

WARNING! Risk of Fire! Shrouds must be constructed
as specifi ed. Improper construction may overheat chase
top.

• Chase top shrouds may be fi eld constructed where

Length x Width to fit inside shroud

permitted by regional building codes.

Figure 10.1 Radiation Shield

NOTICE: Some regional codes require an agency-Listed

shroud. Consult your local building offi cials.

• Hearth & Home Technologies Inc. supplies UL listed
shrouds. See your dealer for details.

• Shrouds must be constructed of minimum 26 ga sheet
metal.

• Different shroud designs have been tested for Hearth Technologies fi replace systems using the TR11 and TR11T termination
caps.

• The shrouds must be constructed from a minimum .018 in. (26 ga) thick aluminized steel.

• The wire mesh is optional but recommended and must be .018 in. thick minimum.

3 in. (76 mm) tall legs

Open Top Shroud (TR342 & TR11/TR11T caps require radiation shield)

Min.

Top Dim.

Min.

Top Dim.

Min. Opening

Width

3 in (76 mm)
minimum

Min. Opening

Width

Min.

Base Dim.

Min.

Base Dim.

in 23 x 23 28 x 28 26 x 26

mm 584 x 584 711 x 711 660 x 660

in 20 x 20 25 x 25 23 x 23

mm 508 x 508 635 x 635 584 x 584

in 17 x 17 22 x 22 20 x 20

mm 432 x 432 559 x 559 508 x 508

TS345 TR342 TR342/344TV

Min. Base Dims.

Radiation Shield

Required

Min. Top Dims.

Min. Opening Width

Figure 10.2 Open Top Shroud Dimensions

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

35

Mailbox Style Shroud (radiation shield required)

3 in. (76 mm)

Min. Opening Height

Min. Height

above radiation

shield

Min. Base Dim

Min.

Base Dim

Min. Opening Width

3 in. (76 mm) Min.

Radiation Shield Height

from top of Chase

Figure 10.3 Mailbox Style Shroud Dimensions

Roofed Style Shroud (radiation shield required)

Minimum

Height above

Radiation Shield

Termination

3 in. (76 mm)

Radiation

Shield Height

Min. Base Dimension

Cap

Radiation Shield

Chase Top

Min. Opening Width

Minimum

Opening

Height

Minimum

Base Dimension

TS345 TR342 TR342/344TV

Min. Base Dims.

in N/A 26-1/2 x 28 28 x 30

mm N/A 673 x 711 711 x 762

Min. Height Above Radiation Shield

in N/A 21-1/4 20-1/2

mm N/A 540 521

Min. Opening Width

in N/A 20-1/2 x 22 22 x 24

mm N/A 521 x 559 559 x 610

TS345/445

in N/A 27 x 27 27 x 27

mm N/A 686 x 686 686 x 686

Min. Height Above Radiation Shield

in N/A 16 16

mm N/A 406 406

in N/A 21 21

mm N/A 533 533

Min. Opening Height

in N/A 12 12

mm N/A 305 305

TR342/344
TR442/444 TR342/344TV

Min. Base Dims.

Min. Opening Width

Figure 10.4 Roofed Style Shroud Dimensions

36

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

11

11

Finishing

A. Non-Combustible Materials

• Materials which will not ignite and burn, composed of
any combination of the following:

- Steel - Iron

- Brick - Tile

- Concrete - Slate

- Glass - Plasters

• Materials reported as passing ASTM E 136, Standard

Test Method for Behavior of Metals, in a Vertical Tube
Furnace at 750° C

B. Combustible Materials

• Materials made of or surfaced with any of the following
materials:

- Wood - Compressed paper

- Plant fi bers - Plastic

• Any material that can ignite and burn; fl ame proofed or
not, plastered or un-plastered

C. Hearth Extension

WARNING! Risk of fi re! High temperatures, sparks,
embers or other burning material falling from the fi replace
may ignite fl ooring or concealed combustible surfaces.

• Protective metal hearth strips MUST be installed
(Section 7.C.).

• Hearth extensions MUST be installed exactly as
specifi ed.

Table 11.1

• You MUST use a hearth extension with this fi replace.

• This fi replace has been tested and approved for use with
a hearth extension insulated to a minimum R value of

1.03.

• The hearth extension material MUST be covered with
tile, stone or other non-combustible material.

• Manufactured hearth materials will usually have a
published R value (resistance to heat) or k value
(conductivity of heat). Refer to the formula in Table 11.1
to convert a k value to an R value,

• Refer to Table 11.2 for hearth extension insulation
alternatives.

C

A

Hearth Extension Dimensions

Model # A B C

A36

(HX3)

A42

(HX4)

in. 52 16 8

mm 1321 406 203

in. 66 20 8

mm 1676 508 203

C

D

R = 1/k x inches of thickness

Table 11.2

Hearth Extension Insulation Alternatives-Total minimum R Value must equal 1.03

Material

Hearth & Home HX3, HX4 (Micore 300™) 0.49 2.06 1/2 in.

USG Micore 160™ 0.39 2.54 1/2 in.

USG Durock™ Cement Board 1.92 0.52 2 in.

Cement Mortor 5.0 0.20 5-1/8 in.

Common Brick 5.0 0.20 5-1/8 in.

Ceramic Tile 12.50 0.08 12-1/4 in.

Armstrong™ Privacy Guard Plus 0.46 2.18 1/2 in.

Marble 14.3-20.0 0.07-0.05 14-5/8 in. - 20-3/8 in.

Figure 11.1 Hearth Extension Dimensions

k per inch

thick

r per inch

thick

Minimum

thickness

required

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

37

D. Finishing Material

Refer to Section 11 for combustible/noncombustible mate­rials. Refer to Figure 11.2 for noncombustible zone.

WARNING! Risk of Fire!

• Use only non-combustible framing material below
standoffs.

• Sheetrock, wood or other combustibles must NOT be
used as sheathing or facing in the noncombustible
zone.

• DO NOT cover metal fi replace front with combustible
materials.

• Install combustible materials only to specifi ed clearances
on top front and side edges.

WARNING! Risk of Fire!

• DO NOT obstruct air inlets or outlets.

• DO NOT modify grilles. Modifying or covering grilles
could cause temperature rise and fi re hazard.

• Finishing materials must not interfere with: air fl ow
through grilles or louvers; operation of louvers or doors;
access for service.

• Complete framing and apply facing material (drywall)
over framing.

• A bead of 300-deg F minimum non-combustible sealant
must be used to close off any gaps at the top and sides
between the fi replace and facing to prevent cold air
leaks.

• Large gaps can be bridged with fiberglass rope
gasket.

• Only non-combustible materials may be used to cover
the metal fi replace front.

You must maintain clearances.

These surfaces
may be covered
with noncombustible
material.

Figure 11.2 Noncombustible Facing

High temperature
sealant.

Finished combustible wall

Combustible material

Non-combustible
decorative facing
(up to full brick depth)

Continuous,
non-combustible sealant

Tile, stone or other
non-combustible material

HX3 or HX4
Hearth Ext
or equivilent
insulation

Figure 11.3 Decorative Facing

Flat 2 x 4 stud wall

2 x 4 header, flush with
front of stand-offs

Hearth
Refractory

Metal strips are placed 2 in. (51 mm)
under the front of the fireplace and must
extend beyond the front and sides of
fireplace opening by 2 in. (51 mm)

Floor constructed of wood or
other combustible material

38

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

E. Combustible Mantel

• See Figure 11.4.

• A combustible mantel may be positioned no
lower than 12 in. (305 mm) above the top of the
fi replace opening.

• A combustible mantel may have a maximum
depth of 12 in. (305 mm).

• Combustible trim and materials cannot be placed
within 6 in. (152 mm) of the fi replace opening
(top or sides).

• Combustible materials projecting more than
1-1/2 in. (38 mm) shall not be placed within
12 in. (305 mm) from the top of the fi replace
opening.

• Combustible trim must not cover the metal
surfaces of the fi replace.

• Mantel clearance is in accordance with Section

7-3.3.3 of ANSI/NFPA211.

F. Sidewalls/Surrounds

• Adjacent combustible sidewalls must be located
a minimum of 12 in. (305 mm) from the fi replace
opening.

• Combustible or noncombustible mantel legs,
surrounds and stub walls may be constructed
per Figure 11.5.

6 ft (1829 mm

base of fireplace

Combustible Wall

2 x 4 stud wall

Standoffs

Seal joint with
noncombustible
sealant

Figure 11.4 Clearances to Mantels or other Combustibles above Fireplace

Î

Combustible Decorative Facing

12 in./305 mm MAXIMUM

Noncombustible
Decorative Facing

12 in.305 mm MINIMUM

Measured from top of fireplace opening

MINIMUM

to ceiling

10 3/4 in.
[273 mm]

FLUSH
FRONT

50° angle

12 in.

[305 mm]

Grid represents 1 in. scale

A

B

BRICK

FRONT

39° angle

12 in.

[305 mm]

Model #

A36

A42

4 in.

[102 mm]

9 3/4 in.

[248 mm]

A

Fireplace OpeningBOutside Dimensions

in. 36 42

mm 914 1067

in. 42 48

mm 1067 1219

Figure 11.5 Mantel Leg or Wall Projections (acceptable on both sides of opening)

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

39

12

12

Accessories

A. Gas Log/Lighter Provision

WARNING! Fire and/or Asphyxiation Risk! Use with
solid wood fuel or decorative gas appliance only. Gas fi re
generates fumes.

• DO NOT install unvented gas logs

• Damper must be locked fully open when gas logs are
installed

A certifi ed gas log lighter or decorative gas log set can be
installed in this fi replace.

• Maximum input is 100,000 BTU/hr.

• Decorative gas appliance must be certifi ed to ANSI
Z21.60 “Standard for Decorative Gas Appliances for
Installation in Vented Fireplaces”.

• Must be installed in accordance with the National Fuel

Gas Code, ANSI Z223.1.

• A gas log set must incorporate a gas shutoff.

• Gas log set requires the damper to be locked fully
open.

• A listed automatic damper system with safety interlock
may be used in this fi replace with only compatible,
listed gas log sets. See damper system manufacturer’s
instructions.

• Knockouts are provided on both sides of the fi replace
and in refractories for 1/2 in. (13 mm) iron pipe.

• Seal refractory around pipe with fi replace mortar or a
high temperature, noncombustible sealant.

B. Wood Burning Inserts

WARNING! Risk of Fire! Improper installation of wood in­serts may cause fi replace or chimney system to overheat.

If a wood burning insert is being installed in this fi replace,
Hearth & Home Technologies recommends full reline of
the chimney.

• Cooling air openings at the top of the chimney must not
be obstructed in any manner.

• Hearth & Home Technologies recommends securing the
reline at the top of the fl ue and using the cap certifi ed for
use with this fi replace system.

C. Install Fan

• Optional.

• Follow instructions included with fan kit.

WARNING! Risk of Electric Shock! DO NOT remove

grounding prong from plug or route cord under or in
front of appliance. Plug directly into a properly ground­ed three-prong receptacle and route cord away from
appliance.

Outer Shell

Firebox

Refractory

Seal with
fireplace mortar
or high temp
noncombustible
sealant

Gas Line

Repack
Insulation
Knockout

Figure 12.1 Gas Line Installation

of Fireplace

Gas Line

4 in.

(102 mm)

Maintain air clearance
to combustibles.

Combustible
Materials

1-1/2 in.
(38 mm)
air space

Combustible materials
may be located at zero
clearance to gas line
beyond 4 in. (102 mm)
from fireplace side.

40

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

13

13

Reference Materials

A. Fireplace Dimensions

in. 36 42 28 1/4 14 1/8

in. 42 48 30 7/8 15 1/2

mm 914 1067 718 359

mm 1067 1219 784 394

3-7/8 in.

(92 mm)

41-3/8 in.

(1051 mm)

9-1/4 in.

(235 mm)

Box

Gas Knockout

41-1/4 in.

Junction

(1048 mm)

(effective height)

4-1/4 in.

(108 mm)

13-1/2 in.

7-1/2 in.

(191 mm)

(343 mm)

A36

Model # A B C D

A42

37-3/4 in.

(959 mm)

C

D

8-3/4 in.

(222 mm)

22-3/4 in.

(578 mm)

B

dia.

10-1/2 in.

(267 mm)

6-1/2 in.

(165 mm)

23-3/8 in.

(594 mm)

8-1/8 in.

9-5/8 in.

8-5/8 in.

(244 mm)

A

(206 mm)

(219 mm)

Air

Outside

Gas Knockout

9-1/4 in.

(235 mm)

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

13-1/2 in.

4-1/4 in.

(108 mm)

(343 mm)

41

B. Fireplace Components

Catalog # Description

A36R/A42R Fireplace with Integral Grate, Hearth Protection Strips and

Traditional Brick Pattern Refractory

A36RH/A42RH Fireplace with Integral Grate, Hearth Protection Strips and

Herringbone Pattern Refractory

DM1736/DM1742 Bi-Fold Glass Door - Clear View - Black

DM1736B/DM1742B Bi-Fold Glass Door - Clear View - Polished Brass

DM1736S/DM1742S Bi-Fold Glass Door - Clear View - Stainless Steel

AK22 Outside Air Kit

HX3 Hearth Extension - A36R & A36RH

HX4 Hearth Extension - A42R & A42RH

GR18 Integral Grate (included with A36R & A36RH

GR19 Integral Grate (included with A42R & A42RH

Bi-fold Glass Doors

DM1736
DM1742

1/2 in.

(13 mm)

GR18 & GR19
Integral Grate

52 in.

(1321 mm)

66 in.

(1676 mm)

AK22 Outside Air Kit

FK23 Fan Kit

JK9 Junction Box

(not shown)

BC10 Fan Speed Motor Control

(not shown)

16 in.

(406 mm)

HX3 Hearth Extension

Herringbone Pattern Refractory

20 in.

(508 mm)

HX4 Hearth Extension

1/2 in.

(13 mm)

42

Traditional Brick Pattern Refractory

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

C. Chimney Components

i

i

The following pictures show only those chimney components which may be safely used with this fi replace.

CAK4A Chimney Air Kit

ID4 Insulated Duct/Outside Air

UD4 Uninsulated Duct/Outside Air

SL306 Chimney Section - 6 in. (152 mm) long

SL312 Chimney Section - 12 in. (305 mm) long

SL318 Chimney Section - 18 in. (457 mm) long

SL324 Chimney Section - 24 in. (610 mm) long

SL336 Chimney Section - 36 in. (914 mm) long

SL348 Chimney Section - 48 in. (1219 mm) long

SL3 Chimney Stabilizer

SL315 Chimney Offset/Return - 15 deg

SL330 Chimney Offset/Return - 30 deg

FS338 Ceiling Firestop - Straight

FS339 Ceiling Firestop - 15 deg

FS340 Ceiling Firestop - 30 deg

AS8 SL300 Straight Attic Insulation Shield, 24 in. (610 mm)

JB877 Chimney Joint Band

CB876 Chimney Bracket

RF370 Roof Flashing - Flat to 6/12 Pitch

RF371 Roof Flashing - 6/12 to 12/12 Pitch

TR344 Round Termination Cap

TR342 Round Telescoping Termination Cap

ST375 Square Termination Cap

TS345 Square Termination Cap

TS345P Square Termination Cap - Painted

TCT375 Terra Cotta Termination Cap

CT35 Chase Top

LDS33 Decorative Shroud - 3 ft x 3 ft (.91 m x .91 m)

LDS46 Decorative Shroud - 4 ft x 6 ft (1.22 m x 1.83 m)

LDS-BV Decorative Shroud - 26 in. x 26 in. (660 mm x 660 mm)

Field Constructed Shrouds (See “Woodburning
Termination Cap”)

ID4 Insulated Duct

42 in.

(1067 mm)

UD4 Uninsulated Duct

42 in.

8 in.

(203 mm)

Chimney Sections

Catalog #

SL306 6 152 4-3/4 121

SL312 12 305 10-3/4 273

SL318 18 457 16-3/4 425

SL324 24 610 22-3/4 578

SL336 36 914 34-3/4 883

SL348 48 1219 46-3/4 1187

A = Actual Length
B = Effective Length (length of

chimney part after it has
been snapped to another)

in mm in mm

4 in. (102 mm)

4 in. (102 mm)

A

10-1/2 in.

(267 mm)

B

AB

CT-3A Adapter - May be used with the following copper caps

CT-King

CT-Queen

CT-Bishop-I

CT-Bishop-II

CT-Knight-I

CT-Pawn

12 in.

(305 mm)

5-1/4 in.

(133 mm)

12 in.

(305 mm)

4 in. (102 mm)

10-1/2 in.
(287 mm)

CAK4A Chimney Air Kit

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

20-3/4 in.

(527 mm)

4-3/4 in. (121 mm)

Effective Height

SL3 Vent Stabilizer

Inside

Diameter

8 in.

(203 mm)

Outside

Diameter
10-1/2 in.
(267 mm)

43

Effective

Height

4-3/4 in.

(121 mm)

SL315/SL330 Offset/Return

Assembled

Diameter: 14 1/2 in./368 mm

Height: 24 in./610 mm

Inside

Diameter

8 in. (203 mm)

Outside

Diameter
10-1/2 in.
(267 mm)

A

B

14-1/2 in.

(368 mm)

Ceiling Firestop

Catalog # A B

FS338 0-deg. 14-1/2 in. 368 mm

FS339 15-deg. 18-3/8 in. 467 mm

FS340 30-deg. 23 in. 584 mm

12 in.

(305 mm)

AS8 Straight Attic Insulation Shield

10-1/2 in.

(267 mm)

2 in. (51 mm)

JB877 Chimney Joint Band

10-1/2 in.
(267 mm)

CB876 Chimney Joint Band

27-3/8 in.

(695 mm)

31 in.

(787 mm)

24-5/8 in.
(625 mm)

RF370 Roof Flashing

12 in.

(305 mm)

24-5/8 in.

(625 mm)

RF371 Roof Flashing

44

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

15-3/4 in.

(400 mm)

TR344 Round Termination Cap

32-1/2 in.

(826 mm)

34-3/4 in.
(883 mm)

20 in.

(508 mm)

17 in.

(432 mm)

9-3/8 in.

(238 mm)

9-1/4 in.

(235 mm)

23 in.

(584 mm)

19 in.

(483 mm)

15-5/8 in.
(397 mm)

ST375 Square Termination Cap

TR342 Round Telescoping Termination Cap

13-1/4 in.
(337 mm)

16-1/4 in.

(413 mm)

22 in.

(559 mm)

23-1/8 in.
(587 mm)

18 in.

(457 mm)

TS345/TS345P Square Termination Cap

10-7/8 in.
(276 mm)

72 in.

(1829 mm)

TCT375 Terra Cotta Cap

7 3/4 in.

26 in.

CT-3A

36 in.

(914 mm)

TR-TVK

C

D

A

LDS33/LDS46 Decorative Shroud

B

ABCD

Catalog #

LDS33 36 914 36 914 8-1/2 216 11 279

LDS46 48 1219 72 1829 8-1/2 216 11 279

in. mm in. mm in. mm in. mm

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

2 in. (51 mm)

CT35 Chase Top

E

D

C

B

A

LDS-BV Decorative Shroud

Catalog # A B C D E

LDS-BV

in. 26 12-1/2 15-1/2 22 23

mm 660 318 394 533 584

45

D. Service Parts

Stocked

at Depot

A36R, A36RH

Ending Manufacturing Date: Active

Beginning Manufacturing Date: June 1998

Service Parts List

Service Parts

22069B Y

09/08

29993

Post SN# AK652474 4010-017

Week 34/98 thru SN# AK652474

Pre Week 34/98 29245

Week 34/98 thru SN# AK652474

29992

Post SN# AK652474 4010-059

29238

30331

GR18 Y

Qty 4 req. 4044-111

Pre Week 34/98 29244

Pre SN# AK652474 28393

Post SN# AK652474 4010-058

4010-017

Pre SN# AK652474 4010-012

Pre SN# AK652474 4010-010

Post SN# AK652474 4010-063

Pre SN# AK652474 4010-009

Post SN# AK652474 4010-061

31191

Post SN# AK652474 4010-062

1 Starter Section

2 Top Standoff

3 Drywall Flange

ITEM DESCRIPTION COMMENTS PART NUMBER

IMPORTANT: THIS IS DATED INFORMATION. When requesting service or replacement

parts for your appliance please provide model number and serial number. All parts listed

in this manual may be ordered from an authorized dealer.

A36R, A36RH

Ending Manufacturing Date: Active

Beginning Manufacturing Date: June 1998

1

2

Service Parts Diagram

Accelerator Woodburning Fireplaces

Service Parts

3

Grate Clip Qty 2 req. 28062

4 Hearth Filler

5Grate

Traditional Refractory (A36R)

7 Back Refractory

6 Hearth Refractory

8 Side Refractory (Left/right)

6 Hearth Refractory

7 Back Refractory

Herringbone Refractory (A36RH)

8 Left Hand Refractory

5

Damper Weight 19785A

Damper Blade 30558

Firescreen Handle 1 ea. 4021-150

Damper Assembly 30528

Door Pivot Clip Qty 2 req. 31527

Firescreen Assembly Qty 2 req. 26053 Y

Firescreen Rod Qty 2 req. 12052 Y

Nailing Flange Qty 4 req. 31190

9 Right Hand Refractory

9

Herringbone Brick Pattern

7

8

8

Outside Air Kit AK22

6

6

Refractory Retainer 11847

Smoke Diverter 30559

Strip Protector Qty 2 req. 18320

Smoke Shield

Upper Door Track 15425

Installation Instructions & Owner's Manual 28376

09/08

46

7

4

8

Traditional Brick Pattern

Part number list on following page.

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

D. Service Parts (continued)

Stocked

at Depot

A42R, A42RH

22069B Y

28388

30332

Ending Manufacturing Date: Active

Beginning Manufacturing Date: June 1998

Service Parts List

Service Parts

GR19 Y

Pre SN# AK652474 28391

Qty 4 req. 4044-111

Post SN# AK652474 4010-018

Pre SN# AK652474 28394

Post SN# AK652474 4010-060

Pre SN# AK652474 28393

Post SN# AK652474 4010-058

4010-018

Pre SN# AK652474 4010-011

Post SN# AK652474 4010-064

Pre SN# AK652474 4010-010

Post SN# AK652474 4010-061

Pre SN# AK652474 4010-009

09/08

35221

Post SN# AK652474 4010-062

1 Starter Section

2 Top Standoff

3 Drywall Flange

ITEM DESCRIPTION COMMENTS PART NUMBER

IMPORTANT: THIS IS DATED INFORMATION. When requesting service or replacement

parts for your appliance please provide model number and serial number. All parts listed

in this manual may be ordered from an authorized dealer.

A42R, A42RH

Ending Manufacturing Date: Active

Beginning Manufacturing Date: June 1998

1

2

Service Parts Diagram

Accelerator Woodburning Fireplaces

Service Parts

3

Grate Clip Qty 2 req. 28062

4 Hearth Filler

5Grate

Traditional Refractory (A42R)

6 Hearth Refractory

7 Back Refractory

8 Side Refractory (Left/right)

6 Hearth Refractory

7 Back Refractory

Herringbone Refractory (A42RH)

8 Left Hand Refractory

9 Right Hand Refractory

5

Damper Weight 19785A

Damper Blade 30558

Firescreen Handle Qty 2 req. 4021-150

Damper Assembly 30528

Door Pivot Clip Qty 2 req. 31527

Firescreen Assembly 1 ea. 29246 Y

Firescreen Rod Qty 2 req. 28404 Y

Nailing Flange Qty 4 req. 31190

Outside Air Kit AK22

Refractory Retainer Qty 3 req. 11847

Smoke Baffl e (Right) 35329

9

6

Herringbone Brick Pattern

7

8

8

Smoke Baffl e (Left) 35330

6

Smoke Shield

Strip Protector Qty 2 req. 18320

Upper Door Track 15427

Installation Instructions & Owner's Manual 28376

09/08

7

4

8

Traditional Brick Pattern

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

Part number list on following page.

47

E. Contact Information

Please contact your Heatilator dealer with any questions or concerns.

For the number of your nearest Heatilator dealer, please visit www.heatilator.com.

Hearth & Home Technologies Inc.

1915 W. Saunders Street

Mt. Pleasant, Iowa 52641

www.heatilator.com

– NOTES –

CAUTION

DO NOT

DISCARD

DO NOT DISCARD THIS MANUAL

• Important operating
and maintenance
instructions included.

This product may be covered by one or more of the following patents: (United States) 4593510, 4686807, 4766876,
4793322, 4811534, 5000162, 5016609, 5076254, 5113843, 5191877, 5218953, 5263471, 5328356, 5341794, 5347983,
5429495, 5452708, 5542407, 5601073, 5613487, 5647340, 5688568, 5762062, 5775408, 5890485, 5931661, 5941237,
5947112, 5996575, 6006743, 6019099, 6048195, 6053165, 6145502, 6170481, 6237588, 6296474, 6374822, 6413079,
6439226, 6484712, 6543698, 6550687, 6601579, 6672860, 6688302B2, 6715724B2, 6729551, 6736133, 6748940,
6748942, 6769426, 6774802, 6796302, 6840261, 6848441, 6863064, 6866205, 6869278, 6875012, 6880275, 6908039,
6919884, D320652, D445174, D462436; (Canada) 1297749, 2195264, 2225408, 2313972; (Australia) 780250, 780403,
1418504 or other U.S. and foreign patents pending.

48

Heatilator • A36R & A42R • 28376 • Rev AF • 11/08

• Read, understand
and follow these
instructions for safe
installation and
operation.

• Leave this manual with
party responsible for
use and operation.