Napoleon Fireplaces GDS26N, GDS26P User Manual

INSTALLER: LEAVE THIS MANUAL WITH THE APPLIANCE.

CONSUMER: RETAIN THIS MANUAL FOR FUTURE REFERENCE.

INSTALLATION AND

OPERATION INSTRUCTIONS

CERTIFIED UNDER CANADIAN AND AMERICAN NATIONAL STANDARDS: ANSI Z21.88 • CSA 2.33 FOR VENTED GAS FIREPLACE HEATERS.

GDS26N

NATURAL GAS

GDS26P

1

PROPANE

CERTIFIED FOR CANADA AND UNITED STATES USING ANSI / CSA METHODS.

SAFETY INFORMATION

!

WARNING

WARNING: If the information in these
instructions are not followed exactly, a fire
or explosion may result causing property
damage, personal injury or loss of life.

- Do not store or use gasoline or other
flammable 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.
Immediately call your gas supplier from
a neighbour’s phone. Follow the gas
supplier’s instructions.
If you cannot reach your gas supplier,
call the fire department.

- Installation and service must be
performed by a qualified installer, service
agency or the supplier.

$10.00

Wolf Steel Ltd., 24 Napoleon Rd., Barrie, ON L4M 4Y8 Canada • [phone] • fax[phone]

www.napoleonfireplaces.com • [e-mail]

W415-0607 / A / 01.18.08

2

TABLE of CONTENTS

PG 3-5 INTRODUCTION

Warranty

General Instructions
General Information
Care of Glass and Plated Parts
Dimensions

5-15 VENTING

Venting Lengths and Air Terminal Locations

Vent Installations
Typical Vent Installations
Special Vent Installations
Minimum Air Terminal Location Clearances
Venting Application Flow Chart
Venting Specifi cations
Vertical Through Existing Chimney
Rear Exit Conversion

16-20 INSTALLATION

Wall and Ceiling Protection

Horizontal Installation
Vertical Installation
Stove Vent Connection
Horizontal Venting Installation
Vertical Venting Installation
Mobile Home Installation
Gas Installation
Minimum Clearances to Combustibles
Minimum Mantel, Shelf or Ceiling Clearances

21 BLOWER INSTALLATION
21 NIGHT LIGHTTM REPLACEMENT
22-23 FINISHING

Glass Door Installation and Removal

Logo Placement
Glass Door Replacement
Switch Functions
Log Placement

24 WIRING DIAGRAM
25 OPERATION / MAINTENANCE
Operating Instructions

Maintenance

26 ADJUSTMENTS
Pilot Injector and Orifi ce Replacement

Flame Adjustment and Characteristics
Venturi Adjustment

27-28 REPLACEMENTS
Ordering Replacement Parts

Replacement Parts
Terminal Kits
Accessories

29-30 TROUBLE SHOOTING GUIDE
31 SERVICE HISTORY
32 NOTES

RETAIN THIS MANUAL FOR FUTURE REFERENCE

!

WARNING

• Do not burn wood or other materials in this stove.

• Adults and especially children should be alerted to the hazards of high surface temperatures and should stay away to avoid burns or
clothing ignition. Supervise young children when they are in the same room as the stove.

• Clothing or other fl ammable material should not be placed on or near the stove.

• Due to high temperatures, the stove should be located out of traffi c and away from furniture and draperies.

• Ensure you have incorporated adequate safety measure to protect infants/toddlers from touching hot surfaces.

• Even after the stove is out, the glass and/or screen will remain hot for an extended period of time.

• Check with your local hearth specialty dealer for safety screens and hearth guards to protect children from hot surfaces. These
screens and guards must be fastened to the fl oor.

• Any safety screen or guard removed for servicing must be replaced prior to operating the stove.

• It is imperative that the control compartments, burners and circulating blower and its passageway in the stove and venting system are
kept clean. The stove and its venting system should be inspected before use and at least annually by a qualifi ed service person. More
frequent cleaning may be required due to excessive lint from carpeting, bedding material, etc. The stove area must be kept clear and
free from combustible materials, gasoline and other fl ammable vapours and liquids.

• Under no circumstances should this stove be modifi ed.

• This stove must not be connected to a chimney fl ue pipe serving a separate solid fuel burning appliance.

• Do not use this stove if any part has been under water. Immediately call a qualifi ed service technician to inspect the stove and to
replace any part of the control system and any gas control which has been under water.

• Do not operate the stove with the glass door removed, cracked or broken. Replacement of the glass should be done by a licensed or
qualifi ed service person.

• Do not strike or slam shut the stove glass door.

• This stove uses and requires a fast acting thermocouple. Replace only with a fast acting thermocouple supplied by Wolf Steel Ltd.

• Pressure relief doors must be kept closed while the stove is operating to prevent exhaust fumes containing carbon monoxide, from
entering into the home. Temperatures of the exhaust escaping through these openings can also cause the surrounding combustible
materials to overheat and catch fi re.

• Only doors / optional fronts certifi ed with the unit are to be installed on the appliance.

W415-0607 / A / 01.18.08

NOTE: Changes, other than editorial, are denoted by a vertical line in the margin.

NAPOLEON® products are manufactured under the strict Standard of the world recognized

ISO 9001 : 2000 Quality Assurance Certifi cate.
NAPOLEON® products are designed with superior components and materials, assembled by trained
craftsmen who take great pride in their work. The burner and valve assembly are leak and test-fi red at
a quality test station. The complete stove is test-fi red and thoroughly inspected by a qualifi ed technician
before packaging to ensure that you, the customer, receives the quality product that you expect from
NAPOLEON®

.

NAPOLEON® GAS STOVE PRESIDENT'S LIFETIME LIMITED WARRANTY

The following materials and workmanship in your new NAPOLEON® gas stove are warranted against defects
for as long as you own the stove. This covers: combustion chamber, heat exchanger, stainless steel burner, phazer™
logs and embers, ceramic glass (thermal breakage only), gold plated parts against tarnishing, porcelainized
enamelled components and aluminium extrusion trims.

Electrical (110V and millivolt) components and wearable parts such as blowers, gas valves, thermal switch,
switches, wiring, remote controls, ignitor, gasketing, and pilot assembly are covered and NAPOLEON® will
provide replacement parts free of charge during the fi rst year of the limited warranty. Light bulbs are not covered
by this warranty.

Labour related to warranty repair is covered free of charge during the fi rst year. Repair work however, requires
the prior approval of an authorized company offi cial. Labour costs to the account of Napoleon® are based on a
predetermined rate schedule and any repair work must be done through an authorized Napoleon® dealer.

3

CONDITIONS AND LIMITATIONS

NAPOLEON® warrants its products against manufacturing defects to the original purchaser only -- i.e., the individual or legal entity

(registered customer) whose name appears on the warranty registration card fi led with NAPOLEON® -- provided that the purchase was
made through an authorized NAPOLEON® dealer and is subject to the following conditions and limitations:

This factory warranty is nontransferable and may not be extended whatsoever by any of our representatives.
The gas stove must be installed by a licensed, authorized service technician or contractor. Installation must be done in accordance

with the installation instructions included with the product and all local and national building and fi re codes.

This limited warranty does not cover damages caused by misuse, lack of maintenance, accident, alterations, abuse or neglect and

parts installed from other manufacturers will nullify this warranty.

This limited warranty further does not cover any scratches, dents, corrosion or discolouring caused by excessive heat, abrasive and

chemical cleaners nor chipping on porcelain enamel parts, mechanical breakage of PHAZER™ logs and embers, nor any venting
components used in the installation of the stove.

NAPOLEON® warrants its stainless steel burners against defects in workmanship and material for life, subject to the following

conditions: During the fi rst 10 years NAPOLEON® will replace or repair the defective parts at our option free of charge. From 10 years
to life, NAPOLEON® will provide replacement burners at 50% of the current retail price.

In the fi rst year only, this warranty extends to the repair or replacement of warranted parts which are defective in material or workmanship

provided that the product has been operated in accordance with the operation instructions and under normal conditions.

After the fi rst year, with respect to this President's Limited Lifetime Warranty, NAPOLEON® may, at its discretion, fully discharge

all obligations with respect to this warranty by refunding to the original warranted purchaser the wholesale price of any warranted but
defective part(s).

After the fi rst year, NAPOLEON® will not be responsible for installation, labour or any other costs or expenses related to the reinstallation

of a warranted part, and such expenses are not covered by this warranty.

Notwithstanding any provisions contained in this President's Limited Lifetime Warranty, NAPOLEON®’S responsibility under this warranty

is defi ned as above and it shall not in any event extend to any incidental, consequential or indirect damages.

This warranty defi nes the obligations and liability of NAPOLEON® with respect to the NAPOLEON® gas stove and any other warranties

expressed or implied with respect to this product, its components or accessories are excluded.

NAPOLEON® neither assumes, nor authorizes any third party to assume, on its behalf, any other liabilities with respect to the sale of this

product. NAPOLEON® will not be responsible for: over-fi ring, downdrafts, spillage caused by environmental conditions such as rooftops,
buildings, nearby trees, hills, mountains, inadequate vents or ventilation, excessive venting confi gurations, insuffi cient makeup air, or
negative air pressures which may or may not be caused by mechanical systems such as exhaust fans, furnaces, clothes dryers, etc.

Any damages to stove, combustion chamber, heat exchanger, brass trim or other component due to water, weather damage, long

periods of dampness, condensation, damaging chemicals or cleaners will not be the responsibility of NAPOLEON®.

The bill of sale or copy will be required together with a serial number and a model number when making any warranty claims from your

authorized dealer. The warranty registration card must be returned within fourteen days to register the warranty.

ALL SPECIFICATIONS AND DESIGNS ARE SUBJECT TO CHANGE WITHOUT PRIOR NOTICE DUE TO ON-GOING PRODUCT IMPROVEMENTS. NAPOLEON® IS A REGIS­TERED TRADEMARK OF WOLF STEEL LTD. PATENTS U.S. 5.303.693.801 - CAN. 2.073.411, 2.082.915. © WOLF STEEL LTD. THIS PRODUCT HAS AN INDUSTRIAL DESIGN
REGISTRATION

W415-0607 / A / 01.18.08

4

GENERAL INSTRUCTIONS GENERAL INFORMATION

THIS GAS STOVE SHOULD BE INSTALLED AND SERVICED
BY A QUALIFIED INSTALLER to conform with local codes.

Installation practices vary from region to region and it is
important to know the specifi cs that apply to your area,
for example: in Massachusetts State:

• The stove damper must be removed or welded in the open
position prior to installation of a stove insert or gas log.

• A carbon monoxide detector is required in all rooms containing

gas fi red appliances.

• The appliance off valve must be a “T” handle gas cock.

• The fl exible connector must not be longer than 36 inches.

• The appliance is not approved for installation in a bedroom or
bathroom unless the unit is a direct vent sealed combustion
product.

• WARNING: This product must be installed by a licensed
plumber or gas fi tter when installed within the commonwealth of
Massachusetts.

In absence of local codes, install to the current CAN1-B149
Installation Code in Canada or to the National Fuel Gas
Code, ANSI Z223.1, and NFPA 54 in the United States.
Mobile home installation must conform with local codes. In
the absence of local codes, install to the current standard for
gas equipped mobile housing CAN/CSA Z240 MH Series in
Canada or the manufactured home construction and safety
standard, Title 24 CFR, part 3280, or the Fire Safety Criteria
for manufactured home installations, Sites and Community

Standard ANSI/NFPA 501A in the United States.

Objects placed in front of the stove must be kept a
minimum of 48" away from the front face of the unit.

The stove and its individual shutoff valve must be disconnected
from the gas supply piping system during any pressure testing
of that system at test pressures in excess of ½ psig (3.5
kPa). The stove must be isolated from the gas supply piping
system by closing its individual manual shutoff valve during
any pressure testing of the gas supply piping system at test
pressures equal to or less than ½ psig (3.5 kPa).

FOR YOUR SATISFACTION, THIS STOVE HAS BEEN TEST­FIRED TO ASSURE ITS OPERATION AND QUALITY!

Minimum inlet gas supply pressure is 4.5 inches water column
for natural gas and 11 inches water column for propane.
Maximum inlet gas pressure is 7 inches water column for
natural gas and 13 inches water column for propane. When
the valve is set to "HI", the manifold pressure under fl ow
conditions is 3.5 inches water column for natural gas and 10
inches water column for propane. When the stove is installed
at elevations above 4,500ft, and in the absence of specifi c
recommendations from the local authority having jurisdiction,
the certifi ed high altitude input rating shall be reduced at the
rate of 4% for each additional 1,000ft.
Expansion / contraction noises during heating up and cooling
down cycles are normal and to be expected.

This appliance is only for use with the type of gas indicated
on the rating plate. This appliance is not convertible for use
with other gases, unless a certifi ed kit is used.

Maximum input is 25,000 BTU/hr for natural gas and propane.
Maximum output is 20,500 BTU/hr at an effi ciency of 82%.

Provide adequate accessibility clearance for servicing and
operating the stove.

Never obstruct the front opening of the stove.
Provided that the clearance to combustibles are achieved,
the most desirable and benefi cial location for a Napoleon®
stove is in the centre of a building, thereby allowing the most
effi cient use of the heat created. The location of windows,
doors and the traffi c fl ow in the room where the stove is to be
located should be considered. If possible, you should choose
a location where the vent will pass through the house without
cutting a fl oor or roof joist.

Rating Label Location: The rating label is located behind the
control door and is chained to the stove.

DO NOT REMOVE.

The stove, when installed with a blower, must be electrically
connected and grounded in accordance with local codes.
In the absence of local codes, use the current CSA C22.1
CANADIAN ELECTRICAL CODE in Canada or the ANSI/
NFPA 70 NATIONAL ELECTRICAL CODE in the United
States.

W415-0607 / A / 01.18.08

CARE OF GLASS AND PLATED PARTS

Do not use abrasive cleaners to clean these parts. Buff lightly
with a clean dry cloth.
The glass is 3/16" ceramic glass available from your Napoleon®
/ Wolf Steel Ltd. dealer. DO NOT SUBSTITUTE MATERIALS.
Clean the glass after the fi rst 10 hours of operation with a
recommended gas stove glass cleaner. Thereafter clean as
required. DO NOT CLEAN GLASS WHEN HOT! If the glass
is not kept clean permanent discolouration and / or blemishes
may result.

FIGURE 1a

DIMENSIONS

FIGURE 1b FIGURE 1c

1

29

351/2”

/8”

37”

GAS
LINE
ACCESS

4” DIA.

23

5

/8”

5

7” DIA.

181/8”

VENTING

VENTING LENGTHS AND AIR TERMINAL LOCATIONS

Use only Wolf Steel, Simpson Dura-Vent, Selkirk Direct
Temp or American Metal Amerivent venting components.
Minimum and maximum vent lengths, for both horizontal
and vertical installations, and air terminal locations for either
system are set out in this manual and must be adhered to.
For Simpson Dura-Vent, Selkirk Direct Temp and American
Metal Amerivent, follow the installation procedure provided
with the venting components.
All outer pipe joints of these venting systems must be sealed
using Red RTV High Temperature Sealant.
The connection between the adaptor for these systems and
the stove fl ue collar must be sealed using the black high
temperature sealant Mill Pac (not supplied).
A starter adaptor must be used with the following vent
systems and may be purchased from the corresponding
supplier:

PART 4"/7" SUPPLIER

Duravent GDS924N Wolf Steel
Amerivent 4DSCB-N1 American Metal
Direct Temp 4DT-AAN Selkirk

For Simpson Dura-Vent, Selkirk Direct Temp and
American Metal Amerivent, follow the installation
procedure found on the website for your venting
supplier:

VENTING SUPPLIER WEBSITE ADDRESS

Simpson Dura-Vent www.duravent.com
Selkirk Direct Temp www.selkirkcorp.com

American Metal Amerivent www.americanmetalproducts.com

For vent systems that provide seals on the inner exhaust
fl ue, only the outer air intake joints must be sealed using
a red high temperature silicone (RTV). This same sealant

ELECTRICAL

ACCESS

may be used on both the inner exhaust and the outer intake
vent pipe joints of all other approved vent systems except
for the exhaust vent pipe connection to the stove fl ue collar
which must be sealed using the black high temperature
sealant Mill Pac.
When using Wolf Steel venting components, use only
approved Wolf Steel rigid / fl exible components with the
following termination kits:Wall Terminal Kit GD222, or
1/12 to 7/12 Pitch Roof Terminal Kit GD110, 8/12 to 12/12
Roof Terminal Kit GD111, Flat Roof Terminal Kit GD112 or
Periscope Kit GD201 (for wall penetration below grade).
Also approved for use with Duravent's co-axial to co-linear
adaptor for installations using an existing chimney.

The maximum allowable vertical vent length is 40 feet,
the minimum allowable vertical vent length is 3 feet.

For optimum fl ame appearance and stove performance,
keep the vent length and number of elbows to a minimum.
The air terminal must remain unobstructed at all times.
Examine the air terminal at least once a year to verify that it
is unobstructed and undamaged.
Horizontal runs may have a 0" rise per foot in all cases
using Wolf Steel, Simpson Dura-Vent, Selkirk Direct Temp,
American Metal Amerivent rigid venting components or Wolf
Steel fl exible venting components.
For optimum performance, it is recommended that horizontal
runs have a minimum 1" rise per foot when using Simpson
Dura-Vent, Selkirk Direct Temp, American Metal Amerivent
or Wolf Steel rigid / fl exible vent components.
Wolf Steel, Simpson Dura-vent, Selkirk Direct Temp, and
American Metal Amerivent venting systems must not be
combined.

VENT INSTALLATIONS

For safe and proper operation of the stove follow the venting instruction exactly.
Deviation from the minimum or the maximum vertical vent length can create diffi culty in burner start-up and/or carboning.
Under extreme vent confi gurations, allow several minutes (5-15) for the fl ame to stabilize after ignition.
Vent lengths that pass through unheated spaces (attics, garages, crawl spaces) should be insulated with the insulation
wrapped in a protective sleeve to minimize condensation.
Use a fi restop, vent pipe shield or attic insulation shield when penetrating interior walls, fl oor or ceiling.

FOR SPECIFIC VENTING PARAMETERS, REFER TO PAGES 9-13.

W415-0607 / A / 01.18.08

6

6” RISE

HORIZONTAL VENT SECTIONS: A minimum clearance
of 1" at the bottom and sides and 2" at the top of the
vent pipe in all horizontal runs to combustibles is
required. Use fi restop spacer W010-1313 and shield
W585-0240 (supplied).

TYPICAL VENT INSTALLATIONS

REAR EXIT TOP EXIT

FIGURE 2a

40 FT MAXIMUM

3 FT MINIMUM

FIGURE 2b

16”

MINIMUM

20" MAXIMUM

VERTICAL VENT SECTIONS: A minimum of 1"
all around the vent pipe on all vertical runs to
combustibles is required. Use fi restop spacer W010-
1313 (supplied).

FIGURE 3a

40 FT MAXIMUM

3 FT MINIMUM

FIGURE 3b

16”

MINIMUM

24" MAXIMUM

1

/2"

35

1

/8" MINIMUM

29

PLUS RISE*

* Refer to "Venting" Section

SPECIAL VENT INSTALLATIONS

PERISCOPE TERMINATION

Use the GD201 periscope kit to locate the air termination
above grade. The periscope must be installed so that when
fi nal grading is completed, the bottom air slot is located a
minimum of 12 inches above grade. The maximum allowable
vent length is 10 ft.

FIGURE 4a

12”
MINIMUM

FIGURE 4b

12”
MINIMUM

10"

MINIMUM

1

/2" MINIMUM

45

PLUS RISE*

1

35

/2"

CORNER TERMINATION

The maximum vent length for a corner installation is 20" of
horizontal run, in addition to the 45° offset. In this case zero
rise is acceptable. See FIGURE 5a. It is recommended to
maintain a 6" rise. See FIGURE 5b.

FIGURE 5a

20” MAXIMUM

FIGURE 5b

MINIMUM

24”

MINIMUM

W415-0607 / A / 01.18.08

MAXIMUM 10FT VENT LENGTH

MINIMUM

24”

MINIMUM AIR TERMINAL LOCATION CLEARANCES

FIGURE 6

7

W415-0607 / A / 01.18.08

8

TOP EXIT

Vertical rise

Vertical Termination

Vertical rise

is less than

horizontal

run

Vertical rise

is equal to

or greater

than the

is less than

horizontal

run

Horizontal

run + verti-

cal rise to

maximum

of 40 feet

horizontal

run

Horizontal

run + verti-

cal rise to

Horizontal

run + verti-

cal rise to

maximum of

maximum

of 40 feet

24.75 feet

3 times the

vertical rise

equal to or

greater than

the horizon-

4.2 times the

vertical rise

equal to or

greater than

the horizon-

tal run

tal run

VENTING APPLICATION FLOW CHART

STOVE VENT EXIT

REAR EXIT

Horizontal Termination

Vertical rise

Vertical rise

Vertical Termination

Vertical rise

Vertical rise

is equal to

or greater

than the

horizontal

run

is less than

horizontal

run

is equal to

or greater

than the

horizontal

run

is less than

horizontal

run

Horizontal

run + verti-

cal rise to

Horizontal

run + verti-

cal rise to

Horizontal

run + verti-

cal rise to

Horizontal

run + verti-

cal rise to

maximum of

maximum

of 40 feet

maximum

of 40 feet

maximum

of 40 feet

24.75 feet

3 times the

vertical rise

equal to or

greater than

the horizon-

3.5 times the

vertical rise

equal to or

greater than

the horizon-

tal run

tal run

W415-0607 / A / 01.18.08

Horizontal Termination

Vertical rise

is equal to

or greater

than the

horizontal

run

Horizontal

run + verti-

cal rise to

maximum

of 40 feet

9

DEFINITIONS

for the following symbols used in the venting calculations
and examples are:

> - greater than
> - equal to or greater than
< - less than
< - equal to or less than
HT - total of both horizontal vent lengths (HR) and offsets
(HO) in feet
HR - combined horizontal vent lengths in feet
HO - offset factor: .03(total degrees of offset - 90°*) in

feet

VT - combined vertical vent lengths in feet

TOP EXIT / HORIZONTAL TERMINATION

(HT) < (VT)

Simple venting confi guration
(only one 90° elbow)

FIGURE 7

ELBOW VENT LENGTH VALUES

feet inches
1° 0.03 0.5
15° 0.45 6.0
30° 0.9 11.0
45° 1.35 16.0
90°* 2.7 32.0

* the fi rst 90° offset has a zero value and is shown in the
formula as -90°

For vent confi gurations requiring more than one 90° elbow,
the following formulas apply:

Formula 1: HT < V

T

Formula 2: HT + VT < 40 feet

90°

H

2

See graph to determine the required vertical rise VT for the
required horizontal run HT.

39

VERTICAL
RISE
IN FEET

V

T

HORIZONTAL VENT RUN PLUS OFFSET IN FEET

The shaded area within the lines represents acceptable
values for HT and V

40

30

20

10

0

2.5 5 7.5 10 12.5 15

.

T

17.5 20

H

T

V

2

FIGURE 8

90°

V

H

1

1

90°

Example 1:

V1 = 3 ft
V2 = 8 ft
VT =
H1 = 2.5 ft
H2 = 2 ft
HR = H1 + H2 = 2.5 + 2 = 4.5 ft
HO = .
HT = HR + HO = 4.5 + 5.4 = 9.9 ft

HT + VT = 9.9 + 11 = 20.9 ft

Formula 1: H

Formula 2: HT + VT < 40 feet

20.9 < 40
Since both formulas are met, this vent confi guration is
acceptable.

V1 +

V2 =

3 + 8 = 11 ft

03(three 90° elbows - 90°) = .03(270° - 90°) = 5.4 ft

< V

T

T

9.9 < 11

W415-0607 / A / 01.18.08

10

TOP EXIT / HORIZONTAL TERMINATION

(HT) > (VT)

Simple venting confi guration
(only one 90° elbow)

See graph to determine the required vertical rise VT for the
required horizontal run HT.

150

REQUIRED
VERTICAL
RISE IN
INCHES

V

T

140

130

120

110

100

90

80

70

60

50

40

30

20

10

0 5 10 15

HORIZONTAL VENT RUN PLUS OFFSET IN FEET H

The shaded area within the lines represents acceptable
values for H

and V

T

.

T

For vent confi gurations requiring more than one 90° elbow
the following formulas apply:

Formula 1: HT < 4.2 V

T

Formula 2: HT + VT < 24.75 feet

FIGURE 9

20

T

90°

Example 2:

V
H1 = 3 ft
H2 = 5 ft
HR = H1 + H2 = 3 + 5 = 8 ft
HO = .03(two 90° elbows - 90°) = .03(180° - 90°) = 2.7 ft
HT = HR + HO = 8 + 2.7 = 10.7 ft
HT + VT =

Formula 1: HT < 4.2 V

4.2 V

= VT = 6 ft

1

10.7 + 6 =16.7

T

= 4.2 x 6 = 25.2 ft

T

10.7 < 25.2

Formula 2: HT + VT < 24.75 feet

16.7 < 24.75

Since both formulas are met, this vent confi guration is ac-
ceptable.

Example 3:

H

3

90°

H

4

V

2

H

V

V

1

V

2

VT = V1 + V2 = 4 + 1.5 = 5.5 ft

1

1

= 4 ft
= 1.5 ft

H1 = 2 ft
H2 = 1 ft
H3 = 1 ft
H4 = 1.5 ft
HR = H1 + H2 + H3 + H4 = 2 + 1 + 1 + 1. 5 = 5.5 ft
HO = .03(four 90° elbows - 90°) = .03(360° - 90°) = 8.1 ft
HT = HR + HO = 5.5 + 8.1 = 13.6 ft
HT + VT = 13.6 + 5.5 = 19.1 ft

Formula 1: HT < 4.2 V

4.2 V

13.6 < 23.1

Formula 2: HT + VT < 24.75 feet

19.1 < 24.75

H

2

FIGURE 11

T

= 4.2 x 5.5 = 23.1 ft

T

V

1

W415-0607 / A / 01.18.08

H

H

1

2

Since both formulas are met, this vent confi guration is
acceptable.

FIGURE10