Superior Fireplaces BRT2000 Series Owner's manual

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INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
Installateur : Laissez cette notice avec l’appareil.
Consommateur : Conservez cette notice pour consultation ultérieure.
This appliance may be installed in an aftermarket permanently located, manufactured home (USA only) or mobile
home, where not prohibited by local codes. 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 certified kit is used.
WARNING AVERTISSEMENT AVISO
HOT GLASS WILL
CAUSE BURNS.
DO NOT TOUCH GLASS
UNTIL COOLED.
NEVER ALLOW CHILDREN
TO TOUCH GLASS.
UNE SURFACE VITRÉE CHAUDE PEUT
CAUSER DES BRÛLURES.
LAISSER REFROIDIR LA SURFACE VITRÉE
AVANT D’Y TOUCHER.
NE PERMETTEZ JAMAIS À UN ENFANT DE
TOUCHER LA SURFACE VITRÉE.
EL VIDRIO CALIENTE
CAUSARÁ QUEMADURAS.
USTED DEBE NUNCA TOCAR
EL VIDRIO CALIENTE.
LOS NIÑOS DEBEN NUNCA
TOCAR EL VIDRIO.
WARNING: If the information in these
instructions is not followed exactly, a fire or
explosion may result causing property damage,
personal injury or death.
AVERTISSEMENT : Assurez-vous de bien suivre les
instructions données dans cette notice pour réduire au
minimum le risque d’incindie ou d’explosion ou pour éviter
tout dommage matériel, toute blessure ou la mort.
—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 neighbor’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
gas supplier.
—Ne pas entreposer ni utilizer d’essence ni d’autres
vapeurs ou liquides inflammables dans le voisinage
de cet appareil ou de tout autre appareil.
—QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ :
• Ne pas tenter d’allumer d’appareil.
• Ne touchez à aucan interrupteur. Ne pas vous
servir des téléphones se trouvant dans le bâtiment
où vous trouvez.
• Appelez immédiatement votre fournisseur de
gaz depuis un voisin. Suivez les instructions du
fournisseur.
• Si vous ne pouvez rejoindre le fournisseur de gaz,
appelez le service des incindies.
—L’installation et l’entretien doivent être assurés par un
installateur ou un service d’entretien qualifié ou par le
fournisseur de gaz.
PFS
®
USC
P126745-01
Installation and Operation Instructions
Superior™ B-Vent Gas Decorative Fireplace
Models
BRT2032TMN BRT2332TMN BRT2532TMN
P/N 126745-01 Rev. D 10/2014
REPORT NO. F09-157

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2
Safety.............................................................................................2
Unpacking......................................................................................4
Introduction ...................................................................................4
Product Specification.....................................................................5
Selecting Location..........................................................................6
Pre-Installation Preparation ...........................................................7
Requirements for The Commonwealth of Massachusetts ..............9
Venting Installation ......................................................................10
Fireplace Installation ....................................................................12
Operation ....................................................................................18
Inspecting Burners ......................................................................20
Cleaning and Maintenance ..........................................................20
Troubleshooting...........................................................................21
Replacement Parts.......................................................................23
Service Hints................................................................................23
Technical Service .........................................................................23
Accessories..................................................................................23
Parts ............................................................................................24
Wiring Diagram............................................................................29
Warranty ......................................................................................31
Thank you for your purchase. We appreciate your
business!
Please carefully read and follow all instructions in this manual. Pay
special attention to all warnings and safety information.
Following these safety, care, and operation instructions will help
ensure many years of dependable and enjoyable service from your
fireplace.
Register your product online today!
To help us keep you up-to-date on product information and
offers, please take a few moments to register your product on-
line at Superiorfireplaces.US.com (Owner Resources/Product
Registration).
Please read and understand these instructions before installing
or operating.
TABLE OF CONTENTS
SAFETY
WARNING: Improper installation, adjustment,
alteration, service or maintenance can cause injury
or property damage. Refer to this manual for correct
installation and operational procedures. For assis-
tance or additional information consult a qualified
installer, service agency or the gas supplier.
This appliance may be installed in an aftermarket,*
permanently located, manufactured (mobile) home,
where not prohibited by local codes.
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 certified
kit is used.
* Aftermarket: Completion of sale, not for purpose of
resale, from the manufacturer
NOT FOR USE WITH SOLID FUEL
CHECK LOCAL CODES PRIOR TO INSTALLATION
SAVE THIS BOOK
This book is valuable. In addition to instructing you
on how to install and maintain your appliance, it also
contains information that will enable you to obtain
replacement parts or optional accessory items when
needed. Keep it with your other important papers.
State of Massachusetts: The installation must be
made by a licensed plumber or gas fitter in the Com-
monwealth of Massachusetts.
WARNING:Thisproductcontainsand/orgenerates
chemicals known to the State of California to cause
cancer or birth defects or other reproductive harm.
IMPORTANT: Read this owner’s manual carefully and
completely before trying to assemble, operate or
service this fireplace. Improper use of this fireplace
can cause serious injury or death from burns, fire,
explosions, electrical shock and carbon monoxide
poisoning.
DANGER: Carbon monoxide poisoning may lead
to death!

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126745-01D 3
SAFETY Continued
This fireplace is a vented product. This fireplace will not produce
any gas leakage into your home if properly installed. This fireplace
must be properly installed by a qualified service person. If this
unit is not properly installed by a qualified service person, gas
leakage can occur.
Carbon Monoxide Poisoning: Early signs of carbon monoxide
poisoning resemble the flu, with headaches, dizziness or nausea.
If you have these signs, the fireplace may not have been installed
properly. Get fresh air at once! Have fireplace inspected and
serviced by a qualified service person. Some people are more af-
fected by carbon monoxide than others. These include pregnant
women, people with heart or lung disease or anemia, those under
the influence of alcohol and those at high altitudes.
Propane/LP and Natural Gas: Both are odorless. An odor-making
agent is added to each of these gases. The odor helps you detect
a gas leak. However, the odor added to these gases can fade. Gas
may be present even though no odor exists.
Make certain you read and understand all warnings. Keep this
manual for reference. It is your guide to safe and proper operation
of this fireplace.
WARNING: Any change to this fireplace or its
controls can be dangerous.
1. 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 certified kit is used.
2. For propane/LP fireplace, do not place propane/LP supply tank(s)
inside any structure. Locate propane/LP supply tank(s) outdoors.
To prevent performance problems, do not use propane/LP fuel
tank of less than 100 lb capacity.
3. If you smell gas
•shutoffgassupply
•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neighbor’sphone.
Follow the gas supplier's instructions
•ifyoucannotreachyougassupplier,calltheredepartment.
4. Never install the fireplace
•inarecreationalvehicle
•wherecurtains,furniture,clothingorotherammableobjects
are less than 42" from the front, top or sides of the fireplace
•inhightrafcareas
•inwindyordraftyareas
5. This fireplace reaches high temperatures. Keep children and
adults away from hot surfaces to avoid burns or clothing igni-
tion. Fireplace will remain hot for a time after shutdown. Allow
surfaces to cool before touching.
6. Carefully supervise young children when they are in the room
with fireplace.
7. A hearth extension is not required with this appliance. If one is
installed, it is for aesthetic purposes only and does not have to
meet the standard requirements.
8. Turn fireplace off and let cool before servicing or repairing. Only
a qualified service person should install, service or repair this
fireplace. Have fireplace inspected annually by a qualified service
person.
9. You must keep control compartments, burners and circulating
air passages clean. More frequent cleaning may be needed due
to excessive lint and dust from carpeting, bedding material, etc.
Turn off the gas valve and pilot light before cleaning fireplace.
10.Have venting system inspected annually by a qualified service
person. If needed, have venting system cleaned or repaired. See
Cleaning and Maintenance, page 20.
11.Keep the area around your fireplace clear of combustible materi-
als, gasoline and other flammable vapor and liquids. Do not run
fireplace where these are used or stored. Do not place items such
as clothing or decorations on or around fireplace.
12.Do not use this fireplace to cook food or burn paper or other
objects.
13.Do not use any solid fuels (wood, coal, paper, cardboard, etc.)
in this fireplace. Use only the gas type indicated on fireplace
nameplate.
14.This appliance, when installed, must be electrically grounded in
accordance with local codes or, in the absence of local codes,
with the National Electrical Code, ANSI/NFPA 70.
15.Do not install fireplace directly on carpeting, vinyl tile or any
combustible material other than wood. The fireplace must set
on a metal or wood panel extending the full width and depth of
the fireplace.
16.Do not use fireplace if any part has been exposed to or under
water. Immediately call a qualified service person to arrange for
replacement of the unit.
17.Do not operate fireplace if any log is broken.
18.Do not use a blower insert, heat exchanger insert or other acces-
sory not approved for use with this fireplace.
19.Provide adequate clearances around air openings.

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4
UNPACKING
The following items are packed inside the firebox. Remove before
positioning firebox into framing.
• CeramicLogPack-Shrinkwrappedoncardboard
• 3plasticbagscontaininglavarock,panandembermaterials
• RearLog(BRT2332TMN/BRT2532TMNModelsOnly).Remove2
plastic quick ties from around burner and grate
• GrateStand-Liftoffofburnerpan
Check all items for any shipping damage. If damaged, promptly
inform dealer or distributor where you bought the product.
Retain these items for later installation.
INTRODUCTION
These fireplace models are vented gas fireplaces that use a millivolt
gas control valve with a millivolt ignition system. 25" models have a
5" B-vent and 24" models have a 4" B-vent. A properly sized B-Type
venting system and listed type vent cap are not supplied but are
required for proper operation. See venting instructions on page 10.
WARNING: This gas appliance must not be con-
nected to a chimney flue servicing a solid fuel burning
appliance.
These models are factory equipped for use with natural gas and must
be converted when intended for use with propane/LP gas. Conver-
sion kits PCBM-324 and PCBM-325 may be purchased for simple
conversion to propane/LP gas. See Accessories, page 23.
BEFORE YOU BEGIN
Before beginning the installation of your appliance, read these in-
structions completely.
This INNOVATIVE HEARHT PRODUCTS (IHP) appliance and its ap-
proved components are safe when installed according to this instal-
lation manual and are operated as recommended by IHP. Using any
component fon IHP approved and tested for use with this appliance
MAY CAUSE A FIRE HAZARD!
The IHP warranty will be voided by, and IHP disclaims any respon-
sibility for the following actions:
A) Modification of the appliance or any of the components.
B) Use of any component part not approved by IHP in combination
with this appliance.
C) Installation and/or operation in a manner other than instructed
in this manual.
D) The burning of anything other than the type of gas approved for
use in this gas appliance.
Installation must conform with local codes or, in the absence of
local codes, with the current National Fuel Gas Code, ANSI Z223.1.
This fireplace complies with the National Safety Standards and is
listed and tested by PFS Corporation to ANSI Z21.50/CSA 2.22
standard as vented gas fireplace.
NOTICE: Decorative product not for use as a heating
appliance.
WARNING:Installation ofthis applianceshould be
done by a qualified service person well trained in the
installation of such appliances. You will also need a
building permit from your local Building and Safety
Commissionerbeforeinstallingthisappliance;other-
wise your insurance co. may not cover this appliance.
CAUTION:Donotconnectappliancebeforepressure
testing gas piping. Damage to gas valve may result
and an unsafe condition may be caused.
WARNING: Young children should be carefully supervised when
they are in the same room as the appliance. Toddlers, young chil-
dren, and others may be susceptible to accidental burns. A physical
barrier is recommended if there are to be at-risk individuals in the
house. To restrict access to a fireplace or stove, install an adjust-
able safety gate to keep toddlers, young children, and other at-risk
individuals out of and away from hot surfaces.
The appliance and it’s 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 1/2 psig (3.5 kPa).
The appliance 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 1/2 psig (3.5 kPa).
For the purpose of input adjustment two pressure taps (for IN and
OUT pressures) are provided on the gas control valve for test gauge
connections to the appliance.
This fireplace may not be installed in manufactured (mobile) hous-
ing constructed to HUD standards. The fireplace may be installed in
aftermarket,non-HUDmanufacturedhousingprovideditsinstallation
complies with State and Local Codes and in the absence of these
codescomplieswiththeNationalFuelGasCodeANSIZ223.1NFPA54..

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126745-01D 5
PRODUCT SPECIFICATION
GAS RATING - NATURAL
BRT2032TMN BRT2332TMN AND BRT2532TMN
Max. Input Rating 15,000 Btu/Hr 25,000 Btu/Hr
Manifold Pressure 3.5" WC (0.87 kPa) 3.5" WC (0.87 kPa)
Minimum Supply Pressure 4.5" WC (1.12 kPa) 4.5" WC (1.12 kPa)
Maximum Supply Pressure 10.5" WC (2.66 kPa) 10.5" WC (2.66 kPa)
Orifice Size # 49 # 40
GAS RATING - PROPANE/LP
Max. Input Rating 15,000 Btu/Hr 25,000 Btu/Hr
Manifold Pressure 10" WC (2.49 kPa) 10" WC (2.49 kPa)
Minimum Supply Pressure 11" WC (2.74 kPa) 11" WC (2.74 kPa)
Maximum Supply Pressure 13" WC (3.23 kPa) 13" WC (3.23 kPa)
Orifice Size # 56 # 54
6 7/ 8 "
2
1
/ 4 "
7"
7"
Alternate Gas
Supply Inlet
13
1
/ 4 "
32
1
/ 4 "
* 27
1
/ 2 "
29"
* 13
3
/ 4 "
14
1
/ 2 "
* 20
3
/ 8 "
21
1
/ 2 "
2
1
/ 2 "
8
1
/ 4 "
11
3
/ 4 "
22
3
/ 8 "
For Use
With B-1
Vent Pipe
Only 16
3
/4"
7
5
/ 8 "
10
5
/ 8 "
8
1
/ 8 "
10
1
/ 2 "
8
3
/ 8 "
2
1
/ 2 "
8
1
/ 4 "
5/8" 34
1
/ 2 "
35
3
/8"
29
1
/ 2 "
18
1
/ 4 "
7"
7"
16
3
/ 4 "
36
1
/ 2 "
* WITH REFRACTORY
DIMENSIONS
HEARTH AREA
Figure 1 - Appliance Dimensions

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6
SELECTING LOCATION
To determine the safest and most efficient location for your appliance,
you must take into consideration the following guidelines:
1. The location must allow for proper clearances (see Clearances,
page 7).
2. Consider a location where heat output would not be affected by
drafts, air conditioning ducts, windows, or doors.
3. A location that avoids the cutting of joists or roof rafters will make
installation easier. Figure 2 shows a plan view of a few common
locations.
Flush installations are recommended where living space is limited or
at a premium, and since the space required to enclose the appliance
would be located beyond an outside wall, this would also reduce the
cutting of joists, roof rafters, and such. Check local codes for any
restrictions.
Projected installations can extend any distance into the room. A pro-
jection may be ideal for a new addition on an existing, finished wall.
Corner installations make use of space that may not normally be
used and provides a wider and more efficient range for radiant heat
transference.
Internal wall installations provide a discreet option for room separa-
tion and can also be ideal as an addition to an existing wall.
Figure 2 - Possible Locations for Installing Fireplace
INTERNAL WALL
INSTALLATION
CORNER
INSTALLATION
FULL
PROJECTION
INSTALLATION
FLUSH
INSTALLATION

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126745-01D 7
PRE-INSTALLATION PREPARATION
CLEARANCES
Minimum clearances to combustibles are:
Ceiling 40" min.
Top of Spacers 0" min.
Back and Sides of Outer Surround 0" min.
Drywall to Sides of Front Face (Nailing Flanges) 0" min.
“B” Vent Surfaces 1" min.
Ceiling to Opening 42" min.
Floor 0" min.
Perpendicular Wall See Figure 6
CAUTION: Do not block required air spaces with
insulation or any other material. Do not obstruct ef-
fective opening of appliance with any type of facing
material.
Figure 3 - Minimum Clearances (Top View)
0 cm/
po
0 cm/po
Clearance
Nailing
Flange
Front Face
Left Side Surround
Back
Drywall
2 x 4 Stud
** **
42" (10.67 cm)
Min. Clearance
from Opening to
Ceiling
0" Clearance
Ceiling
1" (2.5 cm) Min.
Clearance to
"B" Vent's Outer Pipe
Required
Air Spaces
are Indicated
with an "
*
".
Do Not
Pack with
Insulation or
Any Other
Material
DO NOT BLOCK
OR OBSTRUCT
OPENINGS
0" Clearance
to Wood or
Noncombustible
Flooring
Figure 4 - Minimum Clearances (Front View)
MANTEL CLEARANCES AND WALL DETAILS
A combustible mantle shelf maybe installed a maximum 12" (22.9
cm) from the wall. Figures 5 and 6 show the minimum allowable
distancesfromvariouscombustiblemantlecomponentsinrelation
to the fireplace opening.
Spacer
3" (7.6 cm)
1
1
/ 2 "
(3.8 cm) Max.
8" (20.3 cm)
6" (15.2 cm)
13" (33 cm)
12"
(22.9 cm)
Combustible
Materials
Header
Figure 5 - Mantel Clearances - Side View (Cross Section)
1
1
/
2
" (3.8 cm)
Max.
3" (7.6 cm)
Max.
6" (15.2 cm)
Max. 9"
(22.86 cm)
12"
(30.48 cm)
Outer Surround
Combustible
Material May
Be Used
TOP VIEW
SAFE
ZONE
Perpendicular
Wall
Figure 6 - Side Clearances - Top View (Cross Section)

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8
FRAMING
1. Frame appliance enclosure as illustrated in Figures 7 and 8.
Note: If a wall covering is used to line the enclosure, then all
measurements must be from the surface of the covering.
2. Place the appliance into the framing and secure it.
Note: If appliance is to be raised above floor level, a platform
must be built to support the appliance.
3. Install the supply line to the appliance using a 1/2" NPT black iron
gas line terminating 2 5/16" above the bottom of the appliance. The
gas line may be installed from either side or from the rear of the
appliance (see Figure 15, page 13).
4. Feed flexible gas line through one of three gas line conduit sleeves
and repack insulation to cover any openings. Prepare the incom-
ing gas line with Teflon tape or pipe joint compound and hookup
incoming gas line to flexible gas line.
PRE-INSTALLATION PREPARATION Continued
Note: If 1/2" NPT black iron pipe does not mate with fitting at
the end of flexible gas line, remove fitting and replace with a 37
degree flare 3/4"-12, 1/2" NPT (female) fitting.
WARNING: When finishing appliance, do not
overlap combustible material onto the black front
face. Brick, tile, or other noncombustible materials
may be applied to the face provided that any gap is
between the material used and the face is caulked
with a noncombustible caulking.
Figure 7 - Rough Opening for Installing in Wall
16 1/8"
34 3/4"
36 5/8"
Figure 8 - Corner Installation Guidelines
16 3/4"
12"
39 3/8"
55 5/8"
34 1/2"
16"
These Dimensions Allow for a 3/4"
Clearance at Sides and Back of
Fireplace. 0" Clearance is Permitted
3/4" Clearance Not Required
at Nailing Flanges

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126745-01D 9
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 finished grade in the area of the
venting, including but not limited to decks and porches, the following
requirements shall be satisfied:
INSTALLATION OF CARBON MONOXIDE DETECTORS
At the time of installation of the side wall horizontal vented gas fu-
eled equipment, the installing plumber or gas fitter shall observe that
a hard wired carbon monoxide detector with an alarm and battery
backup is installed on the floor level where the gas equipment is to be
installed. In addition, the installing plumber or gas fitter 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 equip-
ment. It shall be the responsibility of the property owner to secure
the services of qualified licensed professionals for the installation of
hard wired carbon monoxide detectors.
In the event that the side wall horizontally vented gas fueled equip-
ment 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 floor 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.
Approved Carbon Monoxide Detectors
Each carbon monoxide detector as required in accordance with
the above provisions shall comply with NFPA 720 and be ANSI/UL
2034 listed and IAS certified.
SIGNAGE
A metal or plastic identification plate shall be permanently 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 fueled heating appliance or equipment. The
sign shall read, in print size no less than 1/2" in size, "GAS VENT
DIRECTLY BELOW. KEEP CLEAR OF ALL OBSTRUCTIONS".
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equip-
ment 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 vent-
ing 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 provide the parts for venting
the flue gases, but identifies "special venting systems", the following
requirements shall be satisfied by the manufacturer:
• The referenced "special venting system" instructions shall be in-
cludedwiththeapplianceorequipmentinstallationinstructions;
and
• The"specialventingsystems"shallbeProductApprovedbythe
Board, and the instructions for that system shall include a parts
list and detailed installation instructions.
A copy of all installation instructions for all Product Approved side
wall horizontally vented gas fueled equipment, all venting instruc-
tions, 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.

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10
VENTING INSTALLATION
A B-type venting system must be connected to the appliance for
venting to the outside of the building.
IHP defines installation standards of this product. Third party prod-
ucts must be installed to their specific standards.
Standing codes requirements concerning B-type vent installations
may vary within your state, province or local codes jurisdiction.
Therefore, it is recommended that you check with your local build-
ing codes for specific requirements or in absence of local codes,
follow Section 7.0 of the current National Fuel Gas Code NFPA No.
54/ANSI Z223.1.
This gas appliance must be vented to the outdoors only and may not
be terminated into an attic space or into a chimney flue servicing a
solid fuel burning appliance.
This appliance may be vented through a manufactured chimney
system or a masonry chimney using a B-vent adapter or a chimney
liner system if all are listed, inspected and approved by local codes
and/or building authorities.
The examples shown in Figure 9, are typical of most B-vent instal-
lations and code practices.
Example 1 shows the minimum allowable system height and lateral
offset for a 60° or greater inclination. Code specifies that offsets at
60° or greater are considered horizontal and must follow the 75%
rule for lateral to total vertical system height. Codes also allows only
one offset in the total system when at 60° or greater. The total vertical
height in this example represents the minimum height of 8 feet and
therefore the allowable lateral is 6 feet when the 75% rule applies. If
the lateral length must exceed 75% then the system must be sized
in accordance with the Category I venting tables.
Example 2 shows a multiple offset each at 45° of inclination. Multiple
offsets are permitted if they do not exceed 45° of inclination. The
total lengths of the two offsets are not required to meet the 75%
allowable rule.
Example 3 shows a single offset at 45° of inclination and therefore the
lateral length at 10 feet of offset does not have to meet the 75% rule.
In each case the offsets must be supported and firestops must be
positioned wherever the vent must pass through a subfloor, ceiling
joist or an attic overhang. The vent pipe must terminate vertically
into a listed type vent cap and extend a sufficient height through an
approved roof flashing, roof jack or a roof thimble. At all points the
listed clearances must be maintained.
Vent terminations must be located in accordance with height and
proximity rules of NFPA No. 54. These rules apply to vents at 12"
diameter or less and require a minimum height in accordance with
the roof pitch and a minimum of 8 feet distance from a vertical wall
or obstruction (see Figure 10, page 11).
If venting horizontally through a side wall becomes necessary, a listed
thimble (38FST recommended) approved for use with B-type vent
must be used. Check with your local codes before venting through
a side wall.
Figure 9 - Typical B-Vent Configuration
Maintain
Listed
Clearance
12' Min.
45°
6'
8'
12' Min.
60° 45°
Position
Firestop
Position
Firestop
Listed
Vent Cap
Listed Vent Cap
Maintain
Listed
Clearance
Maintain
Listed
Clearance
Maintain
Listed
Clearance
Support
Each
Lateral
At Least
Every
6 Feet
Maintain
Listed
Clearance
EXAMPLE 2
EXAMPLE 1
Maintain
Listed
Clearance
12' Min.
45°
Position
Firestop
Listed
Vent Cap
Maintain
Listed
Clearance
10'
EXAMPLE 3