Heat Glo PRIMO48, PRIMO48ST, PRIMO60, PRIMO60ST, PRIMO72 Installation Manual

Installation Manual

Installation and Appliance Setup

INSTALLER: Leave this manual with party responsible for use and operation.
OWNER: Retain this manual for future reference.

Pour demander un exemplaire en français de ce Manuel

du propriétaire, visitez www.heatnglo.com/translations.

NOTICE: DO NOT discard this manual!

Models:

PRIMO48
PRIMO48ST
PRIMO60
PRIMO60ST
PRIMO72
PRIMO72ST

WARNING:
FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings exactly
could result in serious injury, death, or
property damage.

• DO NOT store or use gasoline or other am-
mable vapors and liquids in the vicinity of this

or any other appliance.

• What to do if you smell gas

- DO NOT try to light any appliance.

- DO NOT touch any electrical switch. DO

NOT use any phone in your building.

- Leave the building immediately.

- Immediately call your gas supplier from

a neighbor’s phone. Follow the gas sup-

plier’s instructions.

This appliance may be installed as an OEM
installation in manufactured home (USA
only) or mobile home and must be installed
in accordance with the manufacturer’s
instructions and the Manufactured Home

Construction and Safety Standard, Title 24
CFR, Part 3280 in the United States, or the
Standard for Installation in Mobile Homes,
CAN/CSA Z240 MH Series, in Canada.

This appliance is only for use with the type(s)

of gas indicated on the rating plate. This

appliance is not convertible for use with other

gases, unless a certied kit is used.

In the Commonwealth of Massachusetts installation must be

performed by a licensed plumber or gas tter.

See T able of Contents for location of additional Commonwealth

of Massachusetts requirements.

- If you cannot reach your gas supplier, call

the re department.

• Installation and service must be performed

by a qualied installer, service agency, or the
gas supplier.

This appliance comes standard with patented
SafeSurfaceTM Glass which keeps the surface
temperature of the barrier glass at a safe level and will
still be hot to the touch when operated for long periods
of time. SafeSurface
requirements of ANSI Z21.50-2016 CSA 2.22-2016 for

vented gas replaces. If the barrier glass is removed, the

inner glass temperature will be very hot and cause burns.

TM

Glass complies with the barrier

DANGER

HOT GLASS WILL

CAUSE BURNS.

DO NOT TOUCH GLASS

UNTIL COOLED.

NEVER ALLOW CHILDREN

TO TOUCH GLASS.

A (glass) barrier designed to reduce the risk of

burns from the hot viewing glass is provided
with this appliance and shall be installed for

the protection of children and other at-risk
individuals.

Heat & Glo • PRIMO48, PRIMO48ST, PRIMO60, PRIMO60ST, PRIMO72, PRIMO72ST Installation Manual • 2310-970 Rev. AF • 3/21

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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: Used to address practices not related to personal injury.

Table of Contents



Installation Standard Work Checklist ....................3

1 Product Specic and Important Safety Information

A. Appliance Certication ............................4

B. Glass Specications ..............................4

C. BTU Specications ............................... 4

D. High Altitude Installations ..........................4

E. Non-Combustible Materials Specication. . . . . . . . . . . . . . 5

F. Combustible Materials Specication .................5

G. Electrical Codes .................................5

H. California ...................................... 5

I. Requirements for the Commonwealth of Massachusetts . . 6

7 Venting and Chimneys

A. Assemble Vent Sections .........................35

B. Assemble Slip Sections ..........................36

C. Secure the Vent Sections ......................... 37

D. Disassemble Vent Sections ....................... 37

E. Vertical Termination Requirements

(PVV-SLP and PVI-SLP-B) ........................38

F. Horizontal Termination Requirements ...............39

8 Electrical Information

A. General Information .............................41

B. Wiring Requirements ............................44

2 Getting Started

A. Design and Installation Considerations ............... 7

B. Tools and Supplies Needed ........................ 8

C. Inspect Appliance and Components ..................8

3 Framing and Clearances

A. Appliance/Decorative Finish Dimension Diagrams ......9

B. Appliance Location and Clearances to Combustibles ... 12



C. Constructing the Appliance Chase ..................20

D. Floor Protection ................................20

4 Termination Location and Vent Information

A. Vent Termination Minimum Clearances .............. 21

B. Chimney Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

C. Approved Pipe .................................24

D. Use of Elbows .................................24

E. Measuring Standards ............................ 24

F. Vent System and Diagrams ....................... 24

G. Power Vent Ba󰀪e Adjustment .....................26

5 Vent Clearances and Framing

A. Pipe Clearances to Combustibles .................. 27

B. Wall Penetration Framing/Firestops .................28

C. Ceiling Firestop/Floor Penetration Framing ...........29

D. Install Attic Insulation Shield .......................29

9 Gas Information

A. Fuel Conversion ................................ 47

B. Gas Pressure ..................................47

C. Gas Service Access .............................48

D. Gas Connection ................................50

E. High Altitude Installations .........................51

F. Air Shutter Setting .............................. 51

10 Finishing

A. Facing and Finishing - General Information ........... 52

B. Clean Face Finish (Black Glass Interior) .............55

C. Mantel and Wall Projections ......................63

11 Appliance Setup

A. Remove the Shipping Materials ....................64

B. Clean the Appliance .............................64

C. Burner Glass Installation ......................... 64

D. Install Modern Log Set .......................... 65

E. Install Media .................................. 65

F. Barrier Glass ..................................65

G. Firebox Glass Assembly ......................... 67

12 Reference Materials

A. Vent Components Diagrams ......................68

B. Accessories ................................... 78



6 Appliance Preparation

A. Top Stando󰀨 Preparation .........................30

B. Vent Collar Preparation ..........................31

C. PowerFlow™ Heat Management ..................32

D. Securing and Leveling the Appliance ................33

E. Power Vent Termination Clearances ................34

Heat & Glo • PRIMO48, PRIMO48ST, PRIMO60, PRIMO60ST, PRIMO72, PRIMO72ST Installation Manual • 2310-970 Rev. AF • 3/21

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2

 = Contains updated information.



Installation Standard Work Checklist

ATTENTION INSTALLER:

This standard work checklist is to be used by the installer in conjunction with, not instead of, the instructions contained in this
installation manual.

Customer:
Lot/Address:

Model (circle one): PRIMO48 PRIMO60 PRIMO72
PRIMO48ST PRIMO60ST PRIMO72ST

WARNING! Risk of Fire or Explosion! Failure to install appliance according to these instructions can

lead to a re or explosion.

Appliance Install Sections 3 , 6 and 11 YES IF NO, WHY?

Veried that the chase is insulated and sealed. (Pg. 20) ___________________________
Veried Veried clearances to combustibles. (Pg. 12-19) ___________________________
Stando󰀨s bent up into installation position and secured (Pg. 30) ___________________________
Fireplace is leveled and secured. (Pg. 33) ___________________________
Barrier glass installed correctly. “THIS SIDE OUT” is readable. (Section 11) ___________________________

Venting/Chimney/PowerFlow™ Heat Management Sections 4,5 and 7

Venting conguration complies to vent diagrams. (Section 4) ___________________________
Venting installed, locked, secured in place and sealed with correct clearance. ___________________________
Firestops installed. (Section 5) ___________________________
Attic insulation shield installed. (Section 5) ___________________________
Exterior wall/Roof ashing installed and sealed. (Section 7) ___________________________
Terminations installed and sealed. (Section 7) ___________________________
PVI-SLP-B, PVV-SLP or PVLP-SLP power vent installed with correct ba󰀪e or
ue restrictor setting. ___________________________

PowerFlow™ Heat Management System(s) installed and vented
properly; complies with vent run min./max. requirements in installation manual. ___________________________
HEAT-OUT-PRIMO HEAT-ZONE-PRIMO Passive Heat

Follow this Standard Work Checklist

Date Installed:
Location of Fireplace:
Installer:
Dealer/Distributor Phone #

Serial #:

Electrical Section 8 (Pg 41-46)

Unswitched power (110-120 VAC) provided to the appliance. ___________________________

LED switch wires properly installed. ___________________________
If only HEAT-OUT-PRIMO is installed: Wall switch plate and toggle switch not installed. ___________________________

Gas Section 9 (Pg 47-51)

Proper appliance for fuel type. ___________________________
Was a conversion performed? ___________________________
Leak check performed and inlet pressure veried. ___________________________
Veried proper air shutter setting for installation type. ___________________________
Verify that the gas access plate remains installed. (Pg 48) ___________________________

Finishing Section 10 (Pg 52-63)

1/2 inch sheetrock used as recommended. ___________________________
Veried all clearances meet installation manual requirements. ___________________________
Mantels and wall projections comply with installation manual requirements. ___________________________
Clean Face nishing complete and complies with clearance
requirements in installation manual. ___________________________
Barrier glass properly installed between nishing material and barrier glass tabs. ___________________________

Appliance Setup Section 11 (Pg 64-67)

All packaging and protective materials removed (inside & outside of appliance). ___________________________
Glass panels and media installed correctly. ___________________________
Firebox glass assembly installed and secured. ___________________________
Accessories installed properly. ___________________________
Manual bag and all of its contents are removed from inside/under
the appliance and given to party responsible for use and operation. ___________________________

Started appliance and veried no gas leaks exist. ___________________________

Multicolored LED lights work in all switched positions. ___________________________

Hearth & Home Technologies recommends the following:

• Photographing the installation and copying this checklist for your le.

• That this checklist remain visible at all times on the appliance until the installation is complete.

Comments: Further description of the issues, who is responsible (Installer/ Builder/ Other Trades, etc) and corrective

action needed ____________________________________________________________________________________
Comments Communicated to party responsible ____________________ by ______________________on ___________
(Builder / Gen. Contractor/) (Installer) (Date)

 = Contains updated information.

2310-972 Rev. i 3/21

Heat & Glo • PRIMO48, PRIMO48ST, PRIMO60, PRIMO60ST, PRIMO72, PRIMO72ST Installation Manual • 2310-970 Rev. AF • 3/21

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1 1

Product Specic and Important Safety Information

A. Appliance Certication

MODEL: PRIMO48, PRIMO48ST
PRIMO60, PRIMO60ST, PRIMO72, PRIMO72ST

LABORATORY: Underwriters Laboratories, Inc. (UL)
TYPE: Direct Vent Gas Appliance
STANDARD: ANSI Z21.50-2016 • CSA 2.22-2016

This product is listed to ANSI standards for “Vented Gas
Fireplaces” and applicable sections of “Gas Burning

Heating Appliances for Manufactured Homes and Recre-

ational Vehicles”, and “Gas Fired Appliances for Use at
High Altitudes”.

NOTICE: This installation must conform with local codes.
In the absence of local codes you must comply with the
National Fuel Gas Code, ANSI Z223.1-latest edition in
the U.S.A. and the CAN/CGA B149 Installation Codes in
Canada.

NOT INTENDED FOR USE AS A HEAT SOURCE.

This appliance is decorative in nature and not intended to be

a source of heat.

C. BTU Specications

Models

(U.S. or Canada)

PRIMO48

(NG)

PRIMO48
(Propane)

PRIMO48ST

(NG)

PRIMO48ST

(Propane)
PRIMO60

(NG)

PRIMO60
(Propane)

PRIMO60ST

(NG)

PRIMO60ST

(Propane)
PRIMO72

(NG)

PRIMO72ST

(NG)

(0-2000 FT) 45,000 31,000 #30

(0-2000 FT) 45,000 33,000 #47

(0-2000 FT) 45,000 31,000 #30

(0-2000 FT) 45,000 33,000 #47

(0-2000 FT) 55,000 38,000 #26

(0-2000 FT) 50,000 35,000 #45

(0-2000 FT) 55,000 38,000 #26

(0-2000 FT) 50,000 35,000 #45

(0-2000 FT) 61,000 41,000 #23

(0-2000 FT) 61,000 41,000 #23

Maximum

Input BTU/h

Minimum

Input

BTU/h

Orice

Size

(DMS)

NOT FOR USE WITH SOLID FUEL.

This appliance is not intended to burn solid fuel.

B. Glass Specications

The rebox glass and the barrier glass on this appliance

are tempered glass. Hearth & Home Technologies ap-

pliances manufactured with tempered glass may be in­stalled in hazardous locations such as bathtub enclosures

as dened by the Consumer Product Safety Commission

(CPSC). The tempered glass has been tested and cer­tied to the requirements of ANSI Z97.1 and CPSC 16

CFR 1202 (Safety Glazing Certication Council SGCC#
1595 and 1597. Architectural Testing, Inc. Reports 02-

31919.01 and 02-31917.01).
This statement is in compliance with CPSC 16 CFR Sec-

tion 1201.5 “Certication and labeling requirements”

which refers to 15 U.S. Code (USC) 2063 stating “…Such

certicate shall accompany the product or shall otherwise

be furnished to any distributor or retailer to whom the

product is delivered.”

Some local building codes require the use of tempered

glass with permanent marking in such locations. Glass
meeting this requirement is available from the factory.
Please contact your dealer or distributor to order.

D. High Altitude Installations

NOTICE: If the heating value of the gas has been reduced,
these rules do not apply. Check with your local gas utility
or authorities having jurisdiction.

When installing above 2000 feet elevation:

• In the USA: Reduce input rate 4% for each 1000 feet

above 2000 feet.

• In CANADA: Input ratings are certied without a

reduction of input rate for elevations up to 4500 feet

(1370 m)above sea level. Please consult provincial and/
or local authorities having jurisdiction for installations at
elevations above 4500 feet (1370 m).

Check with your local gas utility to determine proper
orice size.

Heat & Glo • PRIMO48, PRIMO48ST, PRIMO60, PRIMO60ST, PRIMO72, PRIMO72ST Installation Manual • 2310-970 Rev. AF • 3/21

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4

E. Non-Combustible Materials Specication

Material which will not ignite and burn. Such materials

are those consisting entirely of steel, iron, brick, tile, con-

crete, slate, glass or plasters, or any combination thereof.

Materials that are reported as passing ASTM E 136,

Standard Test Method for Behavior of Materials in
a Vertical Tube Furnace at 750 ºC shall be considered
non-combustible materials.

F. Combustible Materials Specication

Materials made of or surfaced with wood, compressed pa-

per, plant bers, plastics, or other material that can ignite
and burn, whether ame proofed or not, or plastered or
unplastered shall be considered combustible materials.

G. Electrical Codes

NOTICE: This appliance must be electrically wired
and grounded in accordance with local codes or, in the
absence of local codes, with National Electric Code

ANSI/NFPA 70-latest edition or the Canadian Electric
Code CSA C22.1.

• A 110-120 VAC circuit for this product must be pro­tected with ground-fault circuit-interrupter protection,
in compliance with the applicable electrical codes,
when it is installed in locations such as in bathrooms

or near sinks.

H. California

WARNING: This product and the fuels used to

operate this product (liquid propane or natural
gas), and the products of combustion of such fuels, can
expose you to chemicals including benzene, which is

known to the State of California to cause cancer and
reproductive harm. For more information go to: www.
P65Warnings.ca.gov.

Heat & Glo • PRIMO48, PRIMO48ST, PRIMO60, PRIMO60ST, PRIMO72, PRIMO72ST Installation Manual • 2310-970 Rev. AF • 3/21

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Note: The following requirements reference various
Massachuset ts and national codes n ot contained in this

document.

I. Requirements for the Commonwealth of

Massachusetts

For all side wall horizontally vented gas fueled equipment

installed in every dwelling, building or structure used in
whole or in part for residential purposes, including those
owned or operated by the Commonwealth and where the
side wall exhaust vent termination is less than seven (7)

feet above nished grade in the area of the venting, in-

cluding but not limited to decks and porches, the following
requirements shall be satised:

Installation of Carbon Monoxide Detectors

At the time of installation of the side wall horizontal vented

gas fueled equipment, the installing plumber or gas tter

shall observe that a hard wired carbon monoxide detector

with an alarm and battery back-up is installed on the oor

level where the gas equipment is to be installed. In addi-

tion, the installing plumber or gas tter shall observe that

a battery operated or hard wired carbon monoxide detec­tor with an alarm is installed on each additional level of
the dwelling, building or structure served by the side wall

horizontal vented gas fueled equipment. It shall be the

responsibility of the property owner to secure the services

of qualied licensed professionals for the installation of
hard wired carbon monoxide detectors.

In the event that the side wall horizontally vented gas fu­eled equipment is installed in a crawl space or an attic,
the hard wired carbon monoxide detector with alarm and

battery back-up may be installed on the next adjacent
oor level.

In the event that the requirements of this subdivision can
not be met at the time of completion of installation, the
owner shall have a period of thirty (30) days to comply
with the above requirements; provided, however, that dur­ing said thirty (30) day period, a battery operated carbon

monoxide detector with an alarm shall be installed.

Inspection

The state or local gas inspector of the side wall horizon­tally vented gas fueled equipment shall not approve the
installation unless, upon inspection, the inspector ob­serves carbon monoxide detectors and signage installed

in accordance with the provisions of 248 CMR 5.08(2)(a)1
through 4.

Exemptions

The following equipment is exempt from 248 CMR 5.08(2)

(a)1 through 4:

• The equipment listed in Chapter 10 entitled “Equipment

Not Required To Be Vented” in the most current edition
of NFPA 54 as adopted by the Board; and

• Product Approved side wall horizontally vented gas fu­eled equipment installed in a room or structure separate
from the dwelling, building or structure used in whole or

in part for residential purposes.

MANUFACTURER REQUIREMENTS
Gas Equipment Venting System Provided

When the manufacturer of Product Approved side wall
horizontally vented gas equipment provides a venting
system design or venting system components with the
equipment, the instructions provided by the manufacturer
for installation of the equipment and the venting system
shall include:

• Detailed instructions for the installation of the venting
system design or the venting system components; and

• A complete parts list for the venting system design or

venting system.

Gas Equipment Venting System NOT Provided

When the manufacturer of a Product Approved side wall
horizontally vented gas fueled equipment does not pro-

vide the parts for venting the ue gases, but identies
“special venting systems”, the following requirements
shall be satised by the manufacturer:

Approved Carbon Monoxide Detectors

• The referenced “special venting system” instructions

shall be included with the appliance or equipment in-

Each carbon monoxide detector as required in accor-

stallation instructions; and

dance with the above provisions shall comply with NFPA
720 and be ANSI/UL 2034 listed and IAS certied.

• The “special venting systems” shall be Product Ap-

proved by the Board, and the instructions for that sys-

Signage

A metal or plastic identication plate shall be permanent-

tem shall include a parts list and detailed installation

instructions.

ly mounted to the exterior of the building at a minimum
height of eight (8) feet above grade directly in line with the
exhaust vent terminal for the horizontally vented gas fu-

eled heating appliance or equipment. The sign shall read,

in print size no less than one-half (1/2) in. in size, “GAS

VENT DIRECTLY BELOW. KEEP CLEAR OF ALL OB­STRUCTIONS”.

A copy of all installation instructions for all Product Ap­proved side wall horizontally vented gas fueled equip­ment, all venting instructions, all parts lists for venting

instructions, and/or all venting design instructions shall

remain with the appliance or equipment at the completion

of the installation.

See Gas Connection section for additional Common­wealth of Massachusetts requirements.

Heat & Glo • PRIMO48, PRIMO48ST, PRIMO60, PRIMO60ST, PRIMO72, PRIMO72ST Installation Manual • 2310-970 Rev. AF • 3/21

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6

Getting Started

2 2

A. Design and Installation Considerations

Heat & Glo direct vent gas appliances are designed to

operate with all combustion air siphoned from outside of

the building and all exhaust gases expelled to the outside.
No additional outside air source is required.

Installation MUST comply with local, regional, state and

national codes and regulations. Consult insurance carrier,
local building inspector, re o󰀩cials or authorities having
jurisdiction over restrictions, installation inspection and
permits.

Before installing, determine the following:

• Where the appliance is to be installed.

• The vent system conguration to be used.

• Gas supply piping.

• Configuration of the required PowerFlow™ Heat

Management System(s). See Section 6.C.

• Electrical wiring requirements.

• Framing and nishing details.

• Which required power vent system will be used: PVI­SLP-B, PVV-SLP or PVLP-SLP.

Notes Regarding Passive Heat Option

• Approved for use with these models ONLY: PRIMO48,

PRIMO48ST, PRIMO60, PRIMO60ST.

• Approved for use ONLY with Clean Face Finishing
Option.

• Hearth & Home Technologies recommends the
PVLP-SLP or PVV-SLP power vent option for use
with the Passive Heat Kit. If the application does not
allow for the PVLP-SLP or PVV-SLP to be used, the
PVI-SLP-B may be used. The PVI-SLP-B must be

mounted outside the chase due to the higher noise

level created.

• Because the Passive Heat option is naturally drafted,

it is the only PowerFlow

that operates automatically when the appliance is

turned on.

Installation and service of this appliance should be performed by

qualied personnel. Hearth & Home Technologies recommends
HHT Factory Trained or NFI certied professionals.

TM

Heat management system

WARNING! Risk of Fire! PRIMO models must be power
vented using PVI-SLP-B, PVV-SLP or PVLP-SLP and
have a PowerFlow™ Heat Management System installed
and operating when the appliance is turned on. Failure to

vent properly could cause overheating and re.

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

Heat & Glo • PRIMO48, PRIMO48ST, PRIMO60, PRIMO60ST, PRIMO72, PRIMO72ST Installation Manual • 2310-970 Rev. AF • 3/21

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B. Tools and Supplies Needed

Before beginning the installation be sure that the following

tools and building supplies are available.
Tape measure Framing material
Pliers Non-corrosive leak check solution

Hammer Phillips screwdriver

Gloves Framing square
Voltmeter Electric drill and bits (1/4 in. magnetic)

Plumb line Safety glasses
Level Reciprocating saw

Manometer Flat blade screwdriver

Suction Cups to lift glass (See Section 11)

1/2 - 3/4 in. length, #6 or #8 Self-drilling screws
Caulking material (300 ºF minimum continuous exposure

rating)

C. Inspect Appliance and Components

• Carefully remove the appliance and components from

the packaging.

• The vent system components and decorative nishes
are shipped in separate packages.

• Report to your dealer any parts damaged in shipment,

particularly the condition of the glass.

• Read all of the instructions before starting the instal­lation. Follow these instructions carefully during the

installation to ensure maximum safety and benet.

WARNING! Risk of Fire or Explosion! Damaged parts
could impair safe operation. DO NOT install damaged, in­complete or substitute components. Keep appliance dry.

Hearth & Home Technologies disclaims any responsibility

for, and the warranty will be voided by, the following actions:

• Installation and use of any damaged appliance or vent

system component.

• Modication of the appliance or vent system.

• Modication of the approved power vent system: (PVI-

SLP-B, PVV-SLP or PVLP-SLP)

• Installation other than as instructed by Hearth & Home

Technologies.

• Improper positioning of the media or the nishing.

• Installation and/or use of any component part not approved

by Hearth & Home Technologies.

Any such action may cause a re hazard.

WARNING! Risk of Fire, Explosion or Electric Shock!
DO NOT use this appliance if any part has been under

water. Call a qualied service technician to inspect the

appliance and to replace any part of the control system
and/or gas control which has been under water.

Heat & Glo • PRIMO48, PRIMO48ST, PRIMO60, PRIMO60ST, PRIMO72, PRIMO72ST Installation Manual • 2310-970 Rev. AF • 3/21

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8

3 3

Framing and Clearances

A. Appliance/Decorative Finish Dimension Diagrams

Dimensions are actual appliance dimensions. Use for reference only. For framing dimensions and clearances refer to Section 3.B.

PowerFlow™ Heat Management Systems Knockouts
IMPORTANT: Must use appropriate knockout(s) for
the selected PowerFlow™ Heat Management system.
See Section 6.

R

Q

o

U

CENTERED ON APPLIANCE

GAS
ACCESS

A

V

F

E

D

B

C

Location

G

H

I

J

PRIMO48 PRIMO60 PRIMO72

Inches Millimeters Inches Millimeters Inches Millimeters

S

ELECTRICAL ACCESS

K

L

T

M

A 41-3/4 1060 47-3/4 1213 47-3/4 1213
B 2-5/16 59 2-5/16 59 2-5/16 59
C 7-11/16 195 7-11/16 195 7-11/16 195
D 2-13/16 71 2-13/16 71 2-13/16 71
E 4 102 4 102 4 102

F 23-13/16 605 23-13/16 605 23-13/16 605
G 8-1/4 210 8-1/4 210 8-1/4 210
H 3-1/2 89 3-7/16 87 3-7/16 87

I 51-1/16 1297 63-1/16 1602 75-1/16 1907

J 60-15/16 1548 72-15/16 1853 84-15/16 2157
K 13-3/8 340 13-3/8 340 13-3/8 340

L 9-3/8 238 9-3/8 238 9-3/8 238
M 39-1/2 1003 39-1/2 1003 39-1/2 1003
N 2-1/16 52 2-1/16 52 2-1/16 52
O 37 940 37 940 37 940

P* 44-3/4 1137 44-3/4 1137 44-3/4 1137

Q 17-3/16 437 17-3/16 437 17-3/16 437
R 59-1/2 1511 71-1/2 1816

83-1/2 2121

S 8-5/8 219 8-5/8 219 8-5/8 219

T 18-3/16 462 18-1/8 460 18-1/8 460
U 8 203 8 203 8 203

V 30-9/16 776 30-9/16 776 30-9/16 776

* = Mimimum Vent Height (using SLP90)

Figure 3.1 Appliance Dimensions - PRIMO48, PRIMO60, PRIMO72

Heat & Glo • PRIMO48, PRIMO48ST, PRIMO60, PRIMO60ST, PRIMO72, PRIMO72ST Installation Manual • 2310-970 Rev. AF • 3/21

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O

N

9

PowerFlow™ Heat Management Systems Seal Plates
IMPORTANT: Must use appropriate knockout(s) for
the selected PowerFlow™ Heat Management system.
See Section 6.

Q

GAS
ACCESS

A

U

F

E

B

C

D

G

H

R

o

T

CENTERED ON APPLIANCE

I

J

S

ELECTRICAL ACCESS

M

K

L

P

O

N

Location

PRIMO48ST PRIMO60ST PRIMO72ST

Inches Millimeters Inches Millimeters Inches Millimeters

A 41-3/4 1060 47-3/4 1213 47-3/4 1213
B 2-5/16 59 2-5/16 59 2-5/16 59
C 7-11/16 195 7-11/16 195 7-11/16 195
D 2-13/16 71 2-13/16 71 2-13/16 71
E 4 102 4 102 4 102

F 23-13/16 605 23-13/16 605 23-13/16 605
G 8-1/4 210 8-1/4 210 8-1/4 210
H 3-1/2 89 3-7/16 87 3-7/16 87

I 51-1/16 1297 63-1/16 1602 75-1/16 1907

J 60-15/16 1548 72-15/16 1853 84-15/16 2157
K 13-3/8 340 13-3/8 340 13-3/8 340

L 9-3/8 238 9-3/8 238 9-3/8 238
M 39-1/2 1003 39-1/2 1003 39-1/2 1003
N 2-1/16 52 2-1/16 52 2-1/16 52
O 37 940 37 940 37 940

P* 44-3/4 1137 44-3/4 1137 44-3/4 1137

Q 17-3/16 437 17-3/16 437 17-3/16 437
R 59-1/2 1511 71-1/2 1816

83-1/2 2121

S 8-5/8 219 8-5/8 219 8-5/8 219

T 8 203 8 203 8 203
U 30-9/16 776 30-9/16 776 30-9/16 776

* = Mimimum Vent Height (using SLP90)

Figure 3.2 Appliance Dimensions - PRIMO48ST, PRIMO60ST, PRIMO72ST

Heat & Glo • PRIMO48, PRIMO48ST, PRIMO60, PRIMO60ST, PRIMO72, PRIMO72ST Installation Manual • 2310-970 Rev. AF • 3/21

1010

10

CLEAN FACE FINISH (BLACK GLASS INTERIOR)

PRIMO48-CF PRIMO48ST-CF
PRIMO60-CF PRIMO60ST-CF
PRIMO72-CF PRIMO72ST-CF

NOTE: Sheetrock (1/2 inch) may be installed up to appliance opening.

(1/2 INCH SHEETROCK)

B

A

Note: See Section 10 for mantel and

nishing requirements and additional
clean face nishing details.

WALL

C

= 1/2 INCH SHEET ROCK

Location

A 22-3/4 578 22-3/4 579 22-3/4 579
B 13-3/8 340 13-3/8 340 13-3/8 340
C 9-3/8 238 9-3/8 238 9-3/8 238
D 51 1295 63 1600 75 1905

Figure 3.3 Clean Face Finish Dimensions

PRIMO48ST

Inches Millimeters Inches Millimeters Inches Millimeters

PRIMO48

D

PRIMO60

PRIMO60ST

= APPLIANCE OPENING

PRIMO72

PRIMO72ST

Heat & Glo • PRIMO48, PRIMO48ST, PRIMO60, PRIMO60ST, PRIMO72, PRIMO72ST Installation Manual • 2310-970 Rev. AF • 3/21

11

B. Appliance Location and Clearances to

Combustibles

When selecting a location for the appliance it is important

to consider the required clearances to walls. See Figure

3.4 and Figure 3.6.

WARNING! Risk of Fire or Burns! Provide adequate
clearance around air openings and for service access.
Due to high temperatures, the appliance should be located

out of trac and away from furniture and draperies.

NOTICE: Illustrations reect typical installations and are

FOR DESIGN PURPOSES ONLY. Illustrations/diagrams
are not drawn to scale. Actual installation could vary due
to individual design preference.

It is important to follow the framing and nishing instruc-

tions step by step to ensure proper placement of replace
in the surrounding framing/nishing materials.

H*

E

F

I

B

F

A

B

C

Refer to Section 10 for mantel and wall
projection information.

H*

B

D

B

H*

18 in. (457 mm) required when
Passive Heat Side Discharge Kit
is installed (PRIMO48/48ST AND

PRIMO60/60ST only).

G

Model A B C D (MAX.) E F G Min. H* I

PRIMO48

PRIMO60

PRIMO72

Figure 3.4 Appliance Locations PRIMO48, PRIMO60, PRIMO72

Heat & Glo • PRIMO48, PRIMO48ST, PRIMO60, PRIMO60ST, PRIMO72, PRIMO72ST Installation Manual • 2310-970 Rev. AF • 3/21

1212

12

Inches 70-3/4 60-1/4 100-3/8 36 28-1/2 1 1

Millimeters 1797 1530 2550 914 724 25 25 756

Inches 79-1/2 72-1/4 112-3/8 36 31-3/4 1 1 29-3/4

Millimeters 2019 1835 2854 914 806 25 25 756

Inches 88 84-1/4 124-3/8 36 35-1/4 1 1 29-3/4

Millimeters 2235 2139 3159 914 895 25 25 756

See H*
note in

Figure

3.5.

29-3/4

PVLP-SLP Minimum Horizontal Footprint

This diagram shows the scenario if the 12-1/2 inch measurement was not accommodated for prior to installation. The
PVLP-BEK may be installed in the 5 inch gap or a small bump out may be created on the exterior wall to accommodate
for the additional space needed.

H*=12-1/2 inches if using PVLP-SLP plus one SLP elbow. This is the minimum vent conguration and is composed of

the factory-installed 6 inch DVP component, DVP-2SL converter, SLP90 elbow and PVLP-SLP termination cap.

WALL TO CAP TRANSITION CAN
BE COMPLETED WITH PVLP-BEK

EXTERIOR

5-1/2 IN.

1/2 IN.

SHEATHING

5 IN.

12-1/2 IN.

(TO BACK OF APPLIANCE)

1/2 IN.

INTERIOR SHEATHING

1 IN. MIN.
CLEARANCE

The dimensions above assume:

• 2 in. X 6 in. exterior wall studs

• 1/2 in. thick interior and exterior wall sheathing material

Figure 3.5 PVLP-SLP Minimum Horizontal Footprint (PRIMO48, PRIMO60, PRIMO72)



C

A

B

C

SIDE VIEW

SLP90

DVP-2SL

FACTORY­INSTALLED
DVP PIPE

12-1/2 IN.

NOTICE: This See-Through appliance is
NOT designed or approved for an indoor/
outdoor application.

NOTICE: (PRIMO48ST/PRIMO60ST ONL Y)
If Passive Heat-Front Discharge or Open
T op Chase is the selected heat management
option, consider these recommendations.

• Locate the Passive Heat discharge opening

in the larger of the two rooms served by the
PRIMO See-Through model installed for
optimal comfort.

• Locate the control side of the appliance and the

Passive Heat discharge opening in the same
room.

Model A B C

PRIMO48ST

PRIMO60ST

PRIMO72ST

Figure 3.6 Appliance Locations PRIMO48ST, PRIMO60ST, PRIMO72ST

Heat & Glo • PRIMO48, PRIMO48ST, PRIMO60, PRIMO60ST, PRIMO72, PRIMO72ST Installation Manual • 2310-970 Rev. AF • 3/21

Inches 60-1/4 17-1/8 1/2

Millimeters 1530 435 13

Inches 72-1/4 17-1/8 1/2

Millimeters 1835 435 13

Inches 84-1/4 17-1/8 1/2

Millimeters 2140 435 13

13

PRIMO48, PRIMO60, PRIMO72

A

HEADER
DEPTH**

B

D

APPLIANCE MAY BE INSTALLED OFF OF FLOOR***

C****

F

J

G

NOTE: E & K dimensions will
change if passive heat option is

MEASURE FROM TOP OF
FIREPLACE OPENING

K=MEASUREMENT
FROM BOTTOM OF
FIREPLACE
TO CEILING

E

K

H

I

installed. See Figure 3.9 and
Figure 3.10.

MINIMUM FRAMING DIMENSIONS* (Single-sided Models)

A B C**** D E F G H I J K

PRIMO48

Rough

Opening

(DVP Vent

Pipe)

Inches 10 9 42 18-1/4 60-1/4 31 0 0 1 1 36 53-3/4

Millimeters 254 229 1067 464 1530 787 0 0 25 25 914 1365

PRIMO60

Rough

Opening

(DVP Vent

Pipe)

Inches 10 9 48 18-1/4 72-1/4 31 0 0 1 1 36 53-3/4

Rough

Opening

(SLP Vent

Pipe)

Rough

Opening

(Height)

Rough

Opening

(Depth)

Rough

Opening

(Width)

Clearance

to Ceiling

Combustible

Floor

Combustible

Flooring

Behind

Appliance

Sides of

Appliance

Front of

Appliance

Clearance

to Ceiling

A B C**** D E F G H I J K

Rough

Opening

(SLP Vent

Pipe)

Rough

Opening

(Height)

Rough

Opening

(Depth)

Rough

Opening

(Width)

Clearance

to Ceiling

Combustible

Floor

Combustible

Flooring

Behind

Appliance

Sides of

Appliance

Front of

Appliance

Clearance

to Ceiling

Millimeters 254 229 1219 464 1835 787 0 0 25 25 914 1365

A B C**** D E F G H I J K

PRIMO72

Rough

Opening

(DVP Vent

Pipe)

Inches 10 9 48 18-1/4 84-1/4 31 0 0 1 1 36 53-3/4

Millimeters 254 229 1219 464 2140 787 0 0 25 25 914 1365

Rough

Opening

(SLP Vent

Pipe)

Rough

Opening

(Height)

Rough

Opening

(Depth)

Rough

Opening

(Width)

Clearance

to Ceiling

Combustible

Floor

Combustible

Flooring

Behind

Appliance

Sides of

Appliance

Front of

Appliance

Clearance

* = Adjust framing dimensions for interior sheathing (such as 1/2 inch sheetrock).
** = Header depth not to exceed 3-1/2 inches.
*** = If appliance is installed o󰀨 of oor, maintain required clearances to combustibles.
Construct platform in accordance with local building codes.

**** = 1.) See Figure 3.5 for PVLP-SLP minimum horizontal footprint.

The rough opening depth will change if installing PVLP-SLP with minimum vent conguration.

= 2.) Adjust framing dimensions for interior sheathing (such as drywall).

Figure 3.7 Clearances to Combustibles-PRIMO48, PRIMO60, PRIMO72

Heat & Glo • PRIMO48, PRIMO48ST, PRIMO60, PRIMO60ST, PRIMO72, PRIMO72ST Installation Manual • 2310-970 Rev. AF • 3/21

1414

14

to Ceiling

PRIMO48ST, PRIMO60ST, PRIMO72ST

A

F

HEADER
DEPTH**

C

B

HEADER
DEPTH**

E=MEASURE FROM TOP
OF FIREPLACE OPENING

J=MEASUREMENT FROM
BOTTOM OF FIREPLACE
TO CEILING

E

I

G

H

J

D*

NOTE: E & J dimensions will
change if passive heat option is
installed. See Figure 3.9 and

APPLIANCE MAY BE
INSTALLED OFF OF FLOOR***

Figure 3.10.

MINIMUM FRAMING DIMENSIONS* (See-Through Models)

A B C D* E F G H I J

PRIMO48ST

Rough

Opening

(DVP Vent

Pipe)

Inches 10 9 42 17 60-1/4 31 0 0 1 36 53-3/4

Millimeters 254 229 1067 432 1530 787 0 0 25 914 1365

PRIMO60ST

Rough

Opening

(DVP Vent

Pipe)

Inches 10 9 48 17 72-1/4 31 0 0 1 36 53-3/4

Millimeters 254 229 1219 432 1835 787 0 0 25 914 1365

PRIMO72ST

Rough

Opening

(DVP Vent

Pipe)

Inches 10 9 48 17 84-1/4 31 0 0 1 36 53-3/4

Rough

Opening

(SLP Vent

Pipe)

Rough
Opening
(Height)

Rough

Opening

(Depth)

Rough

Opening

(Width)

Clearance

to Ceiling

Combustible

Floor

Combustible

Flooring

Sides of

Appliance

Front or

Rear of

Appliance

Clearance

to Ceiling

A B C D* E F G H I J

Rough

Opening

(SLP Vent

Pipe)

Rough
Opening
(Height)

Rough

Opening

(Depth)

Rough

Opening

(Width)

Clearance

to Ceiling

Combustible

Floor

Combustible

Flooring

Sides of

Appliance

Front or

Rear of

Appliance

Clearance

to Ceiling

A B C D* E F G H I J

Rough

Opening

(SLP Vent

Pipe)

Rough
Opening
(Height)

Rough

Opening

(Depth)

Rough

Opening

(Width)

Clearance

to Ceiling

Combustible

Floor

Combustible

Flooring

Sides of

Appliance

Front or

Rear of

Appliance

Clearance

to Ceiling

Millimeters 254 229 1219 432 2140 787 0 0 25 914 1365

* = Adjust framing dimensions for interior sheathing (such as 1/2 inch sheetrock).
**= Header depth not to exceed 3-1/2 inches.
***= If appliance is installed o󰀨 of oor, maintain required clearances to combustibles.
Construct platform in accordance with local building codes.

Figure 3.8 Clearances to Combustibles-PRIMO48ST, PRIMO60ST, PRIMO72ST

Heat & Glo • PRIMO48, PRIMO48ST, PRIMO60, PRIMO60ST, PRIMO72, PRIMO72ST Installation Manual • 2310-970 Rev. AF • 3/21

15

Clearances to Combustibles

Passive Heat Side Discharge (PHSI-PRIMO)
Single-Sided or See-Through

B

Clearances to Combustibles

Passive Heat Front Discharge

(PHFR-PRIMO-48 / PHFR-PRIMO-60)

Single-Sided or See-Through

B

PRIMO48

PRIMO48ST

PRIMO60

PRIMO60ST

F

A

C

E

D

F

G

F

A

D

E

C

MINIMUM FRAMING DIMENSIONS

SIDE DISCHARGE

A B C D E F

Height of

Discharge

Opening

Inches 16 10-3/16 56-9/16 60-1/16 83-7/8 3-1/2

millimeters 406 259 1437 1526 2130 89

Inches 16 10-3/16 62-9/16 66-1/16 89-7/8 3-1/2

millimeters 406 259 1589 1678 2283 89

Width of

Discharge

Opening

Clearance

Opening to

Framing

Clearance

Opening to

Ceiling

Clearance

Bottom of Appliance

to Ceiling

2 x 4 Studs

MINIMUM FRAMING DIMENSIONS

FRONT DISCHARGE

A B C D E F G

Height of

Discharge

Opening

PRIMO48

PRIMO48ST

PRIMO60

PRIMO60ST

Figure 3.9 Clearances to Combustibles-PRIMO48, PRIMO60 with Passive Heat Side Discharge or Front Discharge

Heat & Glo • PRIMO48, PRIMO48ST, PRIMO60, PRIMO60ST, PRIMO72, PRIMO72ST Installation Manual • 2310-970 Rev. AF • 3/21

1616

16

Inches 6 50-7/8 58-9/16 60-1/16 83-7/8

millimeters 152 1292 1488 1526 2130 89

Inches 6 62-3/4 64-9/16 66-1/16 89-7/8 3-1/2

millimeters 152 1594 1640 1678 2283 89

Width of

Discharge

Opening

Clearance

Opening to

Framing

Clearance

Opening to

Ceiling

Clearance

Bottom of Appliance

to Ceiling

Framing

16 inches
on center

2 x 4

Studs

3-1/2

Clearances to Combustibles
Passive Heat Open Top Discharge
(PHSI-PRIMO)
Single-Sided or See-Through

WARNING! Risk of Fire! Minimum
dimension of discharge opening MUST
be 2 inches! Appliance and combustible
materials will overheat.

If Dimension E is greater than two inches,

a piece of mesh screen with 1/2 inch x 1/2

inch opening MUST be installed on the top

of the framing above the appliance.

The screen will prevent objects from falling

through the opening and onto the top of

the appliance, causing a re. The mesh

screen may be available at a hardware or

home improvement retailer.

CEILING

A

E

D

B

C

MINIMUM FRAMING DIMENSIONS

A B C D

PRIMO48

PRIMO48ST

PRIMO60

PRIMO60ST

Clearance
Width of
Opening

Inches 10-3/16 58-1/16 60-1/16 83-7/8

millimeters 259 1475 1526 2130

Inches 10-3/16 64-1/16 66-1/16 89-7/8

millimeters 259 1627 1678 2283

Opening
to Top of

Chase

Clearance

Opening to

Ceiling

Clearance

Bottom of Appliance

to Ceiling

REQUIRED FRAMING DIMENSION

WARNING! Risk of Fire! Maintain framing dimension as required.

• Opening greater than 2 inches: Debris or other material could
enter the chase and cause re. Mesh screen required on top

Required Top of Header to Ceiling

(Discharge Opening)

E

of framing.

• Opening less than 2 inches: Appliance and combustible materials

PRIMO48 / PRIMO48ST
PRIMO60 / PRIMO60ST

will overheat.

Figure 3.10 Clearances to Combustibles-PRIMO48, PRIMO60 with Passive Heat Open Top Discharge

Heat & Glo • PRIMO48, PRIMO48ST, PRIMO60, PRIMO60ST, PRIMO72, PRIMO72ST Installation Manual • 2310-970 Rev. AF • 3/21

Inches 2

millimeters 51

MIN

17



Passive Heat Front Discharge (PHFR-PRIMO-48 / PHFR-PRIMO-60) Trim Kit

Vent Cover Assembly Dimensions

C

PHTRIM-PRIMO-48

PHTRIM-PRIMO-60

A

B
D

A

Inside Height Inside Width Outside Height Outside Width

Inches 2 50-1/2 5-3/4 54

millimeters 51 1283 146 1372

Inches 2 62 5-3/4 65-5/8

millimeters 51 1575 146 1667

B C D

Figure 3.11 Passive Heat Front Discharge - Vent Cover Assembly Dimensions

Heat & Glo • PRIMO48, PRIMO48ST, PRIMO60, PRIMO60ST, PRIMO72, PRIMO72ST Installation Manual • 2310-970 Rev. AF • 3/21

1818

18

TV Mounting - Standard Combustible Framing

SHEETROCK WALL

COMBUSTIBLE

HEADER

TV

PRIMO48 = 41-3/4 IN.
PRIMO60/72 = 47 IN.

Figure 3.12 Standard Combustible Framing

TV Mounting - Steel Header Framing

See “Good Faith Guidelines for TV Installations” in appliance owner’s manual.

=TV

=SHEETROCK WALL

=COMBUSTIBLE
HEADER/STUD

-

STEEL HEADER

Location depends on variables such as TV size,
bracket configuration, etc.
6 in. minimum distance must be met or exceeded

SHEETROCK WALL

*

Steel framing (above appliance) required below this line.

PRIMO48 = 41-3/4 IN.
PRIMO60/72 = 47 IN.

WARNING! Risk of Fire! DO NOT operate appliance with standoffs removed!

STANDOFFS-May need to be relocated to
accommodate steel header. See Detail A.

=TV

=SHEETROCK WALL

=STEEL HEADER

TV

=COMBUSTIBLE
HEADER/STUD

6 IN. MIN.

DETAIL A

RELOCATE STANDOFF

RELOCATE STANDOFF

*

Steel framing must go to top of the standoff. Combustible header/stud can be used above standoff.

Standoffs may be moved toward center
of appliance to allow for steel header.
Standoffs MUST be reinstalled!

Figure 3.13 Framing with Steel Header

Heat & Glo • PRIMO48, PRIMO48ST, PRIMO60, PRIMO60ST, PRIMO72, PRIMO72ST Installation Manual • 2310-970 Rev. AF • 3/21

19

C. Constructing the Appliance Chase

A chase is a vertical box-like structure built to enclose the
gas appliance and/or its vent system. In cooler climates
the vent should be enclosed inside the chase.

NOTICE: Treatment of ceiling restops and wall shield

restops and construction of the chase may vary with the

type of building. These instructions are not substitutes
for the requirements of local building codes. Therefore,
you MUST check local building codes to determine the
requirements to these steps.

NOTICE: Where required by code, install only sprinkler

heads with a sprinkler activation temperature classied

as Extra High.

• Sprinklers inside of chase: Keep sprinkler head away

from vent and chimney.

• Heat Management applications: Maintain 36 inches of
clearance to openings from which heat is discharged
such as convection slots, passive heat registers, heat
zone registers, etc. Refer to Section 6.C for Heat
Management options allowed for this appliance.

Chases should be constructed in the manner of all out­side walls of the home to prevent cold air drafting prob-

lems. The chase should not break the outside building
envelope in any manner.

Walls, ceiling, base plate and cantilever oor of the chase
should be insulated. Vapor and air inltration barriers

should be installed in the chase as per regional codes for

the rest of the home. Additionally, in regions where cold
air inltration may be an issue, the inside surfaces may be
sheetrocked and taped (or an equivalent method may be
used) to achieve maximum air tightness.

To further prevent drafts, the wall shield and ceiling re-

stops should be caulked with caulk with a minimum of
300 ºF continuous exposure rating to seal gaps. Gas line
holes and other openings should be caulked with caulk
with a minimum of 300 ºF continuous exposure rating or
stu󰀨ed with unfaced insulation. If the appliance is being

installed on a cement surface, a layer of plywood may be
placed underneath to prevent conducting cold up into the

room.

D. Floor Protection

NOTICE: Install appliance on hard metal or wood surfaces
extending full width and depth. DO NOT install directly
on carpeting, vinyl, tile or any combustible material other
than wood.

WARNING! Risk of Fire! Maintain specied air space

clearances to appliance and vent pipe:

• Insulation and other materials must be secured to prevent

accidental contact.

• The chase must be properly blocked to prevent blown

insulation or other combustibles from entering and

making contact with replace or chimney.

• Failure to maintain airspace could cause overheating
and re.

Note: Figure 3.7-Figure 3.10 show the replace installed on

the oor. However, this replace can be elevated o󰀨 the oor
provided that the replace is properly supported by framing
materials and the ceiling clearances are maintained.

Heat & Glo • PRIMO48, PRIMO48ST, PRIMO60, PRIMO60ST, PRIMO72, PRIMO72ST Installation Manual • 2310-970 Rev. AF • 3/21

2020

20

4 4

Termination Location and Vent Information

A. Vent Termination Minimum Clearances

WARNING

Fire Risk.

Maintain vent clearance to combustibles as

specied.

• DO NOT pack air space with insulation or other

materials.

Failure to keep insulation or other materials away
from vent pipe could cause overheating and re.

PVV-SLP

HORIZONTAL

OVERHANG

PVV-SLP

TERMINATION CAP

H MIN.

X

12

ROOF PITCH

IS X/ 12

H (MIN.) - MINIMUM HEIGHT FROM ROOF
TO LOWEST DISCHARGE OPENING

2 FT.
MIN.

GAS DIRECT VENT
TERMINATION CAP

Roof Pitch H (Min.) IN.

Flat to 6/12.........................................................33.5*

Over 6/12 to 7/12 ...............................................35*

Over 7/12 to 8/12 ...............................................36*

Over 8/12 to 9/12 ...............................................37.5*

Over 9/12 to 10/12 .............................................39*

Over 10/12 to 11/12 ...........................................40.5

Over 11/12 to 12/12 ...........................................42.5

Over 12/12 to 14/12 ...........................................46

Over 14/12 to 16/12 ...........................................50

Over 16/12 to 18/12 ...........................................54

Over 18/12 to 20/12 ...........................................58

Over 20/12 to 21/12 ...........................................60

20 INCHES

MIN.

LOWEST

DISCHARGE

OPENING

X

12

ROOF PITCH

IS X/ 12

H (MIN.) - MINIMUM HEIGHT FROM ROOF
TO LOWEST DISCHARGE OPENING

VERTICAL

WALL

Roof Pitch H (Min.) IN.

Flat to 6/12.........................................................25*

Over 6/12 to 7/12 ...............................................23*

Over 7/12 to 8/12 ...............................................21*

Over 8/12 to 9/12 ...............................................19*

Over 9/12 to 10/12 .............................................17*

Over 10/12 to 11/12 ...........................................16

Over 11/12 to 12/12 ...........................................15

Over 12/12 to 14/12 ...........................................15

Over 14/12 to 16/12 ...........................................15

Over 16/12 to 18/12 ...........................................15

Over 18/12 to 20/12 ...........................................15

Over 20/12 to 21/12 ...........................................15

* H minimum may vary depending on regional snowfall.

Refer to local codes.

Figure 4.2 Minimum Height From Roof To Lowest Discharge
Opening With Pitch

* H minimum may vary depending on regional snowfall.

Refer to local codes.

25 IN. MIN.

Gas

Figure 4.1 Minimum Height From Roof To Lowest Discharge
Opening Against Pitch

Heat & Glo • PRIMO48, PRIMO48ST, PRIMO60, PRIMO60ST, PRIMO72, PRIMO72ST Installation Manual • 2310-970 Rev. AF • 3/21

Termination

Cap

Figure 4.3 Minimum Dimensions Through Chase Top

21

A B

HORIZONTAL

PVI-SLP-B

PVV-SLP and PVI-SLP-B

OVERHANG

2 FT.
MIN.

GAS DIRECT VENT
TERMINATION CAP

20 INCHES MIN.

LOWEST

DISCHARGE

OPENING

X

12

ROOF PITCH

IS X/ 12

H (MIN.) - MINIMUM HEIGHT FROM ROOF
TO LOWEST DISCHARGE OPENING

Roof Pitch H (Min.) Ft.

Flat to 6/12...........................................................1.0*

Over 6/12 to 7/12 .................................................1.25*

Over 7/12 to 8/12 .................................................1.5*

Over 8/12 to 9/12 .................................................2.0*

Over 9/12 to 10/12 ...............................................2.5*

Over 10/12 to 11/12 .............................................3.25

Over 11/12 to 12/12 .............................................4.0

Over 12/12 to 14/12 .............................................5.0

Over 14/12 to 16/12 .............................................6.0

Over 16/12 to 18/12 .............................................7.0

Over 18/12 to 20/12 .............................................7.5

Over 20/12 to 21/12 .............................................8.0

VERTICAL

WALL

6 in. (minimum) up to 20 in.

152 mm/508 mm

20 in. and over 0 in. minimum

18 in. minimum

457 mm

Gas, Wood or Fuel Oil

Termination Cap

B

A *

Gas

Termination

Cap **

If using decorative cap cover(s), this distance may need to be

*

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

In a staggered installation with both gas and wood or fuel oil

**

terminations, the wood or fuel oil termination cap must be
higher than the gas termination cap.

* H minimum may vary depending on regional snowfall.

Refer to local codes.

Figure 4.4 Minimum Height From Roof To Lowest Discharge
Opening

Figure 4.5 Staggered Termination Caps

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B. Chimney Diagram

C

V

B

J

V

V

= VENT TERMINAL

B

D

V

V

V

X

= AIR SUPPLY INLET

= AREA WHERE TERMINAL IS NOT PERMITTED

A clearances above grade, veranda, porch, deck or balcony

PVLP-SLP PVI-SLP-B

(PRIMO48) 14 inches 12 inches
(PRIMO60) 16 inches 12 inches
(PRIMO72)

18 inches 12 inches

B = 12 inches.................clearance to window or door that may

be opened, or to permanently closed

window
C = 6 inches (PVLP-SLP)
18 inches (PVI-SLP-B)...clearance below unventilated so󰀩t
= 6 inches (PVLP-SLP)

18 inches (PVI-SLP-B).......clearance below ventilated so󰀩t

= 12 inches (PVLP-SLP)

30 inches (PVI-SLP-B).........clearance below vinyl so󰀩ts

and electrical service
D = 6 inches clearance to outside corner

E = 6 inches...................clearance to inside corner

F = 3 ft. (Canada) ..........not to be installed above a gas meter/

regulator assembly within 3 feet horizon-

tally from the center-line of the regulator

G = 3 ft ...........................clearance to gas service regulator vent

outlet
H = 9 inches (U.S.A)
12 inches (Canada). clearance to non-mechanical (unpow-

ered) air supply inlet, combustion air

inlet or direct-vent termination

i = 3 ft. (U.S.A.)

6 ft. (Canada) ...........clearance to a mechanical (powered)

air supply inlet

All mechanical air intakes within 10 feet of a termination cap must
be a minimum of 3 feet below termination.

J = 7 ft. ......................... On public property: clearance above

paved sidewalk or a paved driveway.
A vent shall not terminate directly above a sidewalk or paved driveway

which is located between two single family dwellings and serves

both dwellings.

K = 6 inches ................... clearance from sides of electrical service

L = 12 inches................ clearance above electrical service

Location of the vent termination must not interfere with access to the

electrical service.

M = 18 inches ....................clearance under veranda, porch, deck,

balcony or overhang

= 18 inches (PVLP-SLP)

= 42 inches (PVI-SLP-B) ..........vinyl or composite overhang

Permitted when veranda, porch, deck or balcony is fully
open on a minimum of 2 sides beneath the oor.

Figure 4.5 Minimum Clearances for Termination

F

B

A

G

M

V

O

N

P

R

Q

V

H or i

V

X

H

V

H

E

V

V

A

V

K

L

Electrical

Service

C

V

K

V

Covered Alcove Applications

(Spaces open only on one side and with an overhang)

N = 6 inches ........... non-vinyl sidewalls

12 inches ......... vinyl sidewalls

O = 18 inches ......... non-vinyl so󰀩t and overhang

= 18 inches ........... vinyl so󰀩t and overhang (PVLP-SLP)

= 42 inches..........vinyl so󰀩t and overhang (PVI-SLP-B)

P = 8 ft.

Q

MIN

1 cap 3 feet 2 x Q
2 caps 6 feet 1 x Q
3 caps 9 feet 2/3 x Q
4 caps 12 feet 1/2 x Q

Q

= # termination caps x 3 R

MIN

MEASURE VERTICAL CLEARANCES FROM THIS SURFACE.

MEASURE HORIZONTAL CLEARANCES FROM THIS SURFACE.

CLEARANCE = 6 IN.

= (2 / # termination caps) x Q

MAX

PVLP-SLP

CLEARANCE = 36 IN.

R

MAX

ACTUAL

ACTUAL

ACTUAL

ACTUAL

PVLP-SLP

ACTUAL

CAUTION! Risk of Burns! Termination caps are HOT,

consider proximity to doors, trac areas or where people

may pass or gather (sidewalk, deck, patio, etc.). Listed cap
shields available. Contact your dealer.

• Local codes or regulations may require di󰀨erent clearances.

• Vent system termination is NOT permitted in screened porches.

• Vent system termination is permitted in porch areas with two
or more sides open.

• Hearth & Home Technologies assumes no responsibility for

the improper performance of the appliance when the venting

system does not meet these requirements.

• Vinyl protection kits are suggested for use with vinyl siding.

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C. Approved Pipe

This appliance is approved for use with Hearth & Home

Technologies DVP or SLP venting systems. Refer to Sec-

tion 12.A for vent component information and dimensions.

DO NOT mix pipe, ttings or joining methods from di󰀨er-

ent manufacturers.

The pipe is tested to be run inside an enclosed wall.

There is no requirement for inspection openings at each

joint within the wall.

WARNING! Risk of Fire or Asphyxiation. This appli­ance requires a separate vent. DO NOT vent to a pipe
serving a separate solid fuel burning appliance.

WARNING! Risk of Fire! PRIMO models must be power
vented using PVI-SLP-B, PVV-SLP or PVLP-SLP and an
installed PowerFlow™ Heat Management System. Fail-

ure to vent properly could cause overheating and re.

E. Measuring Standards

Vertical and horizontal measurements listed in the vent

diagrams were made using the following standards:

• Pipe measurements are shown using the e󰀨ective length
of pipe. See Section 12.A for information on e󰀨ective
length of pipe components.

• Measurements are made from the factory-installed 6 inch

DVP pipe, not from the stando󰀨s.

• Horizontal terminations are measured to the outside

mounting surface (flange of termination cap). See
Figure 4.5.

• Vertical terminations are measured to bottom of
termination cap.

• Horizontal pipe installed level with no rise.

D. Use of Elbows

Diagonal runs have both vertical and horizontal vent as-

pects when calculating the e󰀨ects. Use the rise for the

vertical aspect and the run for the horizontal aspect (see

Figure 4.4).

Two 45º elbows may be used in place of one 90º elbow.
On 45º runs, one foot of diagonal is equal to 8-1/2 in. (216
mm) horizontal run and 8-1/2 in. (216 mm) vertical run. A
length of straight pipe is allowed between two 45º elbows.
See Figure 4.4.

Vertical

12 in.

8-1/2 in.

Horizontal

8-1/2 in.

F. Vent System and Diagrams

General Rules:

• When penetrating a combustible wall, a wall shield

restop must be installed.

• When penetrating a combustible ceiling, a ceiling restop
must be installed.

• Horizontal runs of vent do not require vertical rise;

horizontal runs may be level.

• The PRIMO must be power vented using a PVI-SLP-B,
PVV-SLP or a PVLP-SLP system.

WARNING! Risk of Fire! PRIMO models must be power
vented using PVI-SLP-B, PVV-SLP or PVLP-SLP. Failure

to vent properly could cause overheating and re.

• The PRIMO comes standard with a 2 minute pre-purge
function designed to remove gas from the appliance and

establish a positive draft for the vent system.

• The PRIMO comes standard with a 20 minute post-purge
function designed to eliminate condensation in the venting

system components.

• Installation of a PowerFlow™ Heat Management System
is required for the PRIMO.

Figure 4.6

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