Heatilator Gas Fireplace GBST4336I User manual

1
Heatilator • GBST4336I, GBFL4136I • 2135-900 • 2/08
• DO NOT storeorusegasoline or other flam-
mablevapors andliquidsin thevicinity 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 suppli-
er’s instructions.
- If you cannot reach your gas supplier, call
the fire department.
• Installation and service must be performed
bya qualifiedinstaller,serviceagency,orthe
gas supplier.
WARNING: If the information in these
instructions is not followed exactly, a fire
or explosion may result causing property
damage, personal injury, or death.
Owner’s Manual
Installation and Operation
DO NOT DISCARD THIS MANUAL
NOTICE
Installation and service of this appliance should be
performed by qualified personnel. Hearth & Home
Technologies suggests NFI certified or factory trained
professionals, or technicians supervised by an NFI
certified professional.
• Leave this manual with
party responsible for use
and operation.
DO NOT
DISCARD
WARNING
• Important operating
and maintenance
instructions included.
• Read,understandandfollow
these instructions for safe
installation and operation.
In the Commonwealth of Massachusetts installation must be
performed by a licensed plumber or gas fitter.
ACOdetector shall beinstalledin the room wheretheappliance
in installed.
This appliance has been supplied with an integral barrier
to prevent direct contact with the fixed glass panel. DO
NOT operate the appliance with the barrier removed.
Contact your dealer or Hearth & Home Technologies if the
barrier is not present or help is needed to properly install one.
HOT SURFACES!
Glassandothersurfacesarehotduring
operation AND cool down.
Hot glass will cause burns.
• DO NOT touch glass until it is cooled
• NEVER allow children to touch glass
• Keep children away
• CAREFULLY SUPERVISE children in same room as
fireplace.
• Alert children and adults to hazards of high temperatures.
High temperatures may ignite clothing or other flammable
materials.
• Keep clothing, furniture, draperies and other flammable
materials away.
Model:
GBST4336I
GBFL4136I

Heatilator • GBST4336I, GBFL4136I • 2135-900 • 2/08
2
Listing Label Information/Location
Model Name:___________________________________________ Date purchased/installed:__________________
Serial Number:__________________________________________ Location on fireplace:_____________________
Dealership purchased from: _______________________________ Dealer Phone: __________________________
Notes: _______________________________________________________________________________________
_____________________________________________________________________________________________
A. Congratulations
Congratulations on selecting a Heatilator gas fireplace,an
elegant and clean alternative to wood burning fireplaces.
TheHeatilatorgas fireplaceyou haveselectedis designed
to provide the utmost in safety, reliability, and efficiency.
As the owner of a new fireplace, you’ll want to read and
carefully follow all of the instructions contained in this
owner’s manual. Pay special attention to all cautions and
warnings.
This owner’s manual should be retained for future
reference. We suggest that you keep it with your other
important documents and product manuals.
The information contained in this owner’s manual, unless
noted otherwise, applies to all models and gas control
systems.
Your new Heatilator gas fireplace will give you years of
durable use and trouble-free enjoyment. Welcome to the
Heatilator family of fireplace products!
We recommend that you record the following pertinent
information about your fireplace.
The model information regarding your specific fireplace can be found on
the rating plate usually located in the control area of the fireplace.
Homeowner Reference Information
Read this manual before installing or operating this appliance.
Please retain this owner’s manual for future reference.
Gas and Electric
Information
Serial Number
Type of Gas
Model Number
Heat & Glo, a of Hearth & Home Technologies, Inc.
20802 Kensington Boulevard, Lakeville, MN 55044
brand
Heat & Glo, a of Hearth & Home Technologies, Inc.
20802 Kensington Boulevard, Lakeville, MN 55044
brand
Not
Not
for
for
use
use
with
with
solid
solid
fuel.
fuel.
(
(
Ne
Ne
doit
doit
pas
pas
entre
entre
utilise
utilise
avec
avec
un
un
combustible
combustible
solide).
solide).
This
This
appliance
appliance
must
must
be
be
installed
installed
in
in
accordance
accordance
with
with
local
local
codes,
codes,
if
if
any;
any;
if
if
not,
not,
follow
follow
ANSI
ANSI
Z223.1
Z223.1
in
in
the
the
USA
USA
or
or
CAN/CGA
CAN/CGA
B149
B149
installation
installation
codes.
codes.
(Installer
(Installer
l’appareil
l’appareil
selon
selon
les
les
codes
codes
ou
ou
reglements
reglements
locaux
locaux
ou,
ou,
en
en
l’absence
l’absence
de
de
tels
tels
reglements,
reglements,
selon
selon
les
les
codes
codes
d’installation
d’installation
CAN/CGA-B149.)
CAN/CGA-B149.)
Type
Type
of
of
Gas
Gas
(Sorte
(Sorte
De
De
Gaz)
Gaz)
:
:
N
N
A
A
TURAL
TURAL
GAS
GAS
MADE
MADE
IN
IN
USA
USA
Minimum
Minimum
Permissible
Permissible
Gas
Gas
Supply
Supply
for
for
Purposes
Purposes
of
of
Input
Input
Adjustment.
Adjustment.
Approved
Approved
Minimum
Minimum
(De
(De
Gaz)
Gaz)
Acceptable
Acceptable
0.0
0.0
in
in
w.c.
w.c.
(Po.
(Po.
Col.
Col.
d’eau)
d’eau)
Maximum
Maximum
Pressure
Pressure
(Pression)
(Pression)
0.0
0.0
in
in
w.c.
w.c.
(Po.
(Po.
Col.
Col.
d’eau)
d’eau)
Maximum
Maximum
Manifold
Manifold
Pressure
Pressure
(Pression)
(Pression)
0.0
0.0
in
in
w.c.
w.c.
(Po.
(Po.
Col.
Col.
d’eau)
d’eau)
Minimum
Minimum
Manifold
Manifold
Pressure
Pressure
(Pression)
(Pression)
0.0
0.0
in
in
w.c.
w.c.
(Po.
(Po.
Col.
Col.
d’eau)
d’eau)
Model:
Model:
(Modele):
(Modele):
Serial
Serial
(Serie):
(Serie):
ANSI
ANSI
Z21XX-XXXX
Z21XX-XXXX
·
·
CSA
CSA
2.XX-MXX
2.XX-MXX
·
·
UL307B
UL307B
XXXXXXXX
XXXXXXXX
IN
IN
CANADA
CANADA
ALTITUDE:
ALTITUDE:
0-0000
0-0000
FT.
FT.
0000-0000FT.
0000-0000FT.
MAX.
MAX.
INPUT
INPUT
BTUH:
BTUH:
00,000
00,000
00,000
00,000
MIN.
MIN.
INPUT
INPUT
BTUH:
BTUH:
00,000
00,000
00,000
00,000
ORIFICE
ORIFICE
SIZE:
SIZE:
#XXXXX
#XXXXX
#XXXXX
#XXXXX
XXXXXXXX
XXXXXXXX
Total
Total
Electrical
Electrical
Requirements:
Requirements:
000Vac,
000Vac,
00Hz.,
00Hz.,
less
less
than
than
00
00
Amperes
Amperes
This product may be covered by one or more of the following patents: (Nos produits sont couverts par un ou plusieurs des brevets suivants): (United States)
4593510, 4686807, 4766876, 4793322, 4811534, 5000162, 5016609, 5076254, 5113843, 5191877, 5218953, 5263471, 5328356, 5341794, 5347983, 5429495,
5452708, 5542407, 5601073, 5613487, 5647340, 5688568, 5762062, 5775408, 5890485, 5931661, 5941237, 5947112, 5996575, 6006743, 6019099, 6048195,
6053165, 6145502, 6170481, 6237588, 6296474, 6374822, 6413079, 6439226, 6484712, 6543698, 6550687, 6601579, 6672860, 6688302B2, 6715724B2,
6729551, 6736133, 6748940, 6748942, D320652, D445174, D462436; (Canada)1297749, 2195264, 2225408; or other U.S. and foreign patents pending (ou
autres brevets americains et etrangers en attente).
R

3
Heatilator • GBST4336I, GBFL4136I • 2135-900 • 2/08
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
A. Congratulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
B. Limited Lifetime Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . 5
1 Listing and Code Approvals
A. Appliance Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
B. Tempered Glass Specifications . . . . . . . . . . . . . . . . . . . . . 6
C. BTU Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
D. HighAltitude Installations. . . . . . . . . . . . . . . . . . . . . . . . . . 6
E. Non-Combustible Materials Specification. . . . . . . . . . . . . . 6
F. Combustible Materials Specification . . . . . . . . . . . . . . . . . 6
User Guide
2 Operating Instructions
A. Gas Fireplace Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
B. Your Fireplace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
C. Clear Space . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
D. Decorative Doors and Fronts. . . . . . . . . . . . . . . . . . . . . . . 8
E. Fixed Glass Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
F. Remote Controls, Wall Controls and Wall Switches. . . . . . 8
G. Outside Air (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
H. Before Lighting Fireplace. . . . . . . . . . . . . . . . . . . . . . . . . . 8
I. Lighting Instructions (IPI) . . . . . . . . . . . . . . . . . . . . . . . . . . 9
J. After Fireplace is Lit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
K. Frequently Asked Questions . . . . . . . . . . . . . . . . . . . . . . 10
3 Maintenance and Service
A. Maintenance Tasks-Homeowner . . . . . . . . . . . . . . . . . . . 11
B. Maintenance Tasks-Qualified Service Technician . . . . . . 12
Installer Guide
4 Getting Started
A. Typical Appliance System. . . . . . . . . . . . . . . . . . . . . . . . . 13
B. Design and Installation Considerations . . . . . . . . . . . . . . 14
C. Tools and Supplies Needed . . . . . . . . . . . . . . . . . . . . . . . 14
D. InspectAppliance and Components. . . . . . . . . . . . . . . . . 14
E. Negative Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5 Framing and Clearances
A. Selecting Appliance Location . . . . . . . . . . . . . . . . . . . . . . 16
B. Constructing the Appliance Chase. . . . . . . . . . . . . . . . . . 17
C. Clearances. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
D. Mantel and Wall Projections. . . . . . . . . . . . . . . . . . . . . . . 19
6 Termination Locations
A. Vent Termination Minimum Clearances . . . . . . . . . . . . . . 20
7 Vent Information and Diagrams
A. Vent Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
B. Vent System Configuration. . . . . . . . . . . . . . . . . . . . . . . . 21
8 Vent Clearances and Framing
A. Pipe Clearances to Combustibles . . . . . . . . . . . . . . . . . . 22
B. Wall and Ceiling Penetration Framing . . . . . . . . . . . . . . . 22
C. Vertical Penetration Framing . . . . . . . . . . . . . . . . . . . . . . 22
9 Appliance Preparation
A. Installing Outside Air Kit Damper Assembly. . . . . . . . . . . 23
B. Gas and Electrical Connections. . . . . . . . . . . . . . . . . . . . 23
C. Securing and Leveling theAppliance. . . . . . . . . . . . . . . . 24
10 Installing Vent Pipe
A. Assembly of Vent Sections. . . . . . . . . . . . . . . . . . . . . . . . 25
B. Attaching Vent to Firebox. . . . . . . . . . . . . . . . . . . . . . . . . 25
C. Securing Vent Sections . . . . . . . . . . . . . . . . . . . . . . . . . . 25
D. InstallAttic Insulation Shield. . . . . . . . . . . . . . . . . . . . . . . 25
11 Gas Information
A. Fuel Conversion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
B. Gas Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
C. Gas Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
D. HighAltitude Installations. . . . . . . . . . . . . . . . . . . . . . . . . 26
12 Electrical Information
A. Wiring Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
B. Intellifire Ignition System Wiring. . . . . . . . . . . . . . . . . . . . 27
C. OptionalAccessories Requirements . . . . . . . . . . . . . . . . 27
D. Electrical Service and Repair. . . . . . . . . . . . . . . . . . . . . . 28
E. Junction Box Installation. . . . . . . . . . . . . . . . . . . . . . . . . . 29
13 Finishing
A. Mantel and Wall Projections. . . . . . . . . . . . . . . . . . . . . . . 30
B. Facing Material. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
C. Splatter Guard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Heatilator • GBST4336I, GBFL4136I • 2135-900 • 2/08
4
Î= Contains updated information.
14 Appliance Setup
A. Remove Glass Assembly . . . . . . . . . . . . . . . . . . . . . . . . . 33
B. Remove the Shipping Materials . . . . . . . . . . . . . . . . . . . . 33
C. Clean theAppliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
D. Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
E. Lava Rock and Glowing Ember Placement. . . . . . . . . . . . . . 33
F. Install the Log Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . 34
G. Fixed Glass Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
H. Install Trim Kits and Surrounds . . . . . . . . . . . . . . . . . . . . 36
I. Air Shutter Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
15 Troubleshooting
A. Intellifire Ignition System . . . . . . . . . . . . . . . . . . . . . . . . . 37
16 Reference Materials
A. Appliance Dimension Diagram. . . . . . . . . . . . . . . . . . . . . 39
B. Service Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
C. Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

5
Heatilator • GBST4336I, GBFL4136I • 2135-900 • 2/08
B. Limited Lifetime Warranty
Gas Appliance (Fireplace)
Limited Lifetime Warranty
HEARTH & HOME TECHNOLOGIES INC. (“HHT”) extends the following warranty for HEATILATOR® gas appliances installed
in the United States of America or Canada (the “Appliance”). Dealers and employees of HHT have no authority to make any
warranty or authorize any remedies in addition to or inconsistent with the terms of this warranty.
Limited Lifetime Warranty
HHTwarrantstheAppliance for componentfailure due toamanufacturing defect ofanyof the followingcomponents: combustion
chamber, burner pan, and logs. The Limited Lifetime Warranty specified above is subject to the conditions, exclusions and
limitations listed below, is for the period the Appliance is owned by the original homeowner only, and is nontransferable.
1 Year Limited Warranty
HHT warrants theAppliance to be free from failure of any of the following components for a period of one year after installation:
valve, flexible gas line connector, glass panel, fan, direct vent chimney components, factory paint, gasket, piezo ignitor,
thermopile, thermocouple, junction box, pilot assembly, shutoff valve, high limit switch, refractory liners, transformer, and control
box. If the Heatilator Appliance is found to be defective in either material or workmanship within one year of the date of original
installation, HHT will provide replacement parts at no charge and pay reasonable labor and freight costs, and is for the period
of one year following the date of original installation of the Appliance.
Conditions, Exclusions, & Limitations of Liability
A. Both the Limited Lifetime and 1 Year Limited Warranties supplied by HHT apply only while the Appliance is in its location of
originalinstallation. HHT’sobligationunderthiswarrantydoesnotextendtodamages resulting from (1) installation, operation
or maintenance of the Appliance not in accordance with the Installation Instructions, Operating Instructions, and the Listing
Agent Identification Label furnished with the Appliance; (2) installation which does not comply with local building codes;
(3) shipping, improper handling, improper operation, abuse, misuse, accident or unworkmanlike repairs; (4) environmental
conditions, inadequate ventilation or drafting caused by tight sealing construction of the structure, air handling devices
such as exhaust fans or forced air furnaces, or other causes; (5) use of fuels other than those specified in the Operating
Instructions; (6) installation or use of components not supplied with the Appliance or any other components not expressly
authorized and approved by HHT; and/or (7) modification of the Appliance not expressly authorized and approved by HHT in
writing. This warranty is limited to only the component parts manufactured or supplied by HHT.
B. HHT’s liability under both the Limited Lifetime Warranty and the 1 Year Limited Warranty is limited to the replacement and
repair of defective components or workmanship during the applicable period. HHT may fully discharge all of its obligations
under such warranties by repairing the defective component(s) or at HHT’s discretion, providing replacement parts at no
charge and paying reasonable labor and freight costs.
C. EXCEPT TO THE EXTENT PROVIDED BY LAW, HHT MAKES NO EXPRESS WARRANTIES OTHER THAN THE
WARRANTY SPECIFIED HEREIN. THE DURATION OF ANY IMPLIED WARRANTY IS LIMITED TO DURATION OF THE
WARRANTY SPECIFIED ABOVE.
D. Some states do not allow exclusions or limitations of incidental or consequential damages, so those limitations may not apply
to you. This warranty gives you specific rights; you may also have other rights which vary from state to state.
How to Obtain Service
To obtain service under this warranty you must:
1. Send written notice of the claimed condition to Heatilator Technical Service Department, Hearth & Home Technologies, 1915
W. Saunders Street, Mt. Pleasant, Iowa 52641-1563. You may also register your claim online at www.heatilator.com.
2. Provide proof of purchase, model number, serial number, and manufacturing date code to HHT.
3. Provide HHT reasonable opportunity to investigate the claim, including reasonable opportunity to inspect theAppliance prior
to any repair or replacement work and before the Appliance or any component of the Appliance has been removed from the
place of original installation.
4. Obtain HHT’s consent to any warranty work before the work is done.
ADDITIONAL INFORMATION:
If you would like information on current HEATILATOR products or want to locate a dealer in your area, call 1-800-927-6841.
®2003 Heatilator® is a Registered Trademark of Hearth & Home Technologies Inc.

Heatilator • GBST4336I, GBFL4136I • 2135-900 • 2/08
6
B. Tempered Glass Specifications
Hearth & Home Technologies appliances manufactured
with tempered glass may be installed in hazardous loca-
tions such as bathtub enclosures as defined by the Con-
sumerProductSafetyCommission(CPSC).Thetempered
glass has been tested and certified to the requirements
of ANSI Z97.1 and CPSC 16 CFR 1202 (Safety Glazing
Certification Council SGCC# 1595 and 1597. Architectur-
al Testing, Inc. Reports 02-31919.01 and 02-31917.01).
This statement is in compliance with CPSC 16 CFR Sec-
tion 1201.5 “Certification and labeling requirements”
which refers to 15 U.S. Code (USC) 2063 stating “…Such
certificate 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.
C. BTU SpecificationsA. Appliance Certification
E. Non-Combustible Materials Specification
Material which will not ignite and burn. Such materials are
those consisting entirely of steel, iron, brick, tile, concrete,
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 and UL763 shall be
considered non-combustible materials.
F. Combustible Materials Specification
Materials made of or surfaced with wood, compressed pa-
per, plant fibers, plastics, or other material that can ignite
and burn, whether flame proofed or not, or plastered or
unplastered shall be considered combustible materials.
NOT INTENDED FOR USE AS A PRIMARY HEAT SOURCE.
This appliance is tested and approved as either supplemen-
tal room heat or as a decorative appliance. It should not be
factored as primary heat in residential heating calculations.
D. High Altitude Installations
NOTICE: Iftheheating valueof thegashas beenreduced,
these rules do not apply. Check with your local gas utility
or authorities having jurisdiction.
When installing above 2000 feet elevation:
• IntheUSA: Reduceburnerorifice 4%foreach 1000feet
above 2000 feet.
• In CANADA: Reduce burner orifice 10% for elevations
between 2000 feet and 4500 feet. Above 4500 feet,
consult local gas utility.
1
1 Listing and Code Approvals
MODELS: GBST4336I, GBFL4136I
LABORATORY: Underwriters Laboratories, Inc. (UL)
TYPE: B-Vent Decorative
STANDARD: ANSI Z21.50-2007 • CSA 2.22-2007
Models
(U.S. or Canada)
Maximum
Input
BTU/h
Minimum
Input
BTU/h
Orifice
Size
(DMS)
GBST4336I (NG)
GBFL4136I (NG)
US
(0-2000 FT) 37,000 26,000 32
CANADA
(2000-4500 FT) 33,300 23,400 33
GBST4336I (LP)
GBFL4136I (LP)
US
(0-2000 FT) 36,000 27,000 50
CANADA
(2000-4500 FT) 32,400 24,300 51
This product is listed to ANSI standards for “Vented Gas
Fireplaces” and “Gas Fired Appliances for Use at High
Altitudes”.
This model (natural gas and propane) can be installed in
a bedroom (in the United States) which has a total volume
of unconfined space appropriate to the particular installa-
tion. Refer to the National Fuel Gas Code ANSI Z223.1/
NFPA 54 (current edition), The Uniform Mechanical
Code - (current edition), and local Building Officials for
the options allowed in obtaining an effective bedroom vol-
ume of unconfined space.
This model may be installed in a sleeping room when the
provisions for combustion, ventilation and dilution air are
met per the requirements ofANSI 223.1/NFPA54 Nation-
al Fuel Gas Code. In Canada, installation in a sleeping
room requires installation with a thermostat certified for
use with this product. Consult your local authorities hav-
ing jurisdiction.
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.

7
Heatilator • GBST4336I, GBFL4136I • 2135-900 • 2/08
2
2 Operating Instructions
Figure 2.1 General Operating Parts
B. Your Fireplace
WARNING! DO NOT operate fireplace before read-
ing and understanding operating instructions. Failure
to operate fireplace according to operating instructions
could cause fire or injury.
PRODUCT SPECIFIC
OUTSIDE AIR CONTROL
(NOT SHOWN)
SECTION 2.G.
DECORATIVE DOORS
(NOT SHOWN)
SECTION 2.D.
FIXED GLASS ASSEMBLY
(NOT SHOWN)
SECTION 14.H.
MANTEL
HEARTH
CLEAR SPACE
SECTION 2.C.
If you expect that small children or vulnerable adults may
come into contact with this fireplace, the following precau-
tions are recommended:
• Install a physical barrier such as:
- A decorative firescreen.
- Adjustable safety gate.
• Install a switch lock or a wall/remote control with child
protection lockout feature.
User Guide
A. Gas Fireplace Safety
WARNING
This appliance has been supplied with an integral barrier
to prevent direct contact with the fixed glass panel. DO
NOT operate the appliance with the barrier removed.
Contact your dealer or Hearth & Home Technologies if the
barrier is not present or help is needed to properly install one.
HOT SURFACES!
Glassandothersurfacesarehotduring
operation AND cool down.
Hot glass will cause burns.
• DO NOT touch glass until it is cooled
• NEVER allow children to touch glass
• Keep children away
• CAREFULLY SUPERVISE children in same room as
fireplace.
• Alert children and adults to hazards of high temperatures.
High temperatures may ignite clothing or other
flammable materials.
• Keep clothing, furniture, draperies and other flammable
materials away.
• Keep remote controls out of reach of children.
• Never leave children alone near a hot fireplace,whether
operating or cooling down.
• Teach children to NEVER touch the fireplace.
• Consider not using the fireplace when children will be
present.
Contact your dealer for more information, or visit: www.
hpba.org/staysafe.
To prevent unintended operation when not using your fire-
place for an extended period of time (summer months,
vacation/trips, etc):
• Remove batteries from remote controls.
• Turn off wall controls.
• Unplug 3 volt adapter plug and remove batteries on IPI
models.

Heatilator • GBST4336I, GBFL4136I • 2135-900 • 2/08
8
C. Clear Space
WARNING! DO NOT place combustible objects in front
of the fireplace or block louvers. High temperatures may
start a fire. See Figure 2.2.
Avoid placing candles and other heat-sensitive objects on
mantel or hearth. Heat may damage these objects.
Figure 2.2 Clear Space
G. Outside Air (optional)
The outside air kit supplies some fresh combustion air for
your fireplace. It may help reduce the effects of negative
air pressure. (See Section 6.B.)
• Refer to Figure 2.1 for location of control.
• Close the inlet to prevent cold drafts when the fireplace
is not being used.
CAUTION! Risk of Burns! The outside air control handle
is HOT when fireplace is in operation. Adjust BEFORE
lighting fire.
E. Fixed Glass Assembly
See Section 14.K.
D. Decorative Doors and Fronts
WARNING! Risk of Fire! Install ONLY doors or fronts
approved by Hearth & Home Technologies. Unapproved
doors or fronts may cause fireplace to overheat.
This fireplace has been supplied with an integral
barrier to prevent direct contact with the fixed glass
panel. DO NOT operate the fireplace with the barrier
removed.
Contact your dealer or Hearth & Home Technologies if
the barrier is not present or help is needed to properly
install one.
Formoreinformation refertothe instructionssuppliedwith
your decorative door or front.
F. Remote Controls, Wall Controls and Wall
Switches
Follow the instructions supplied with the control installed
to operate your fireplace:
For safety:
• Install a switch lock or a wall/remote control with child
protection lockout feature.
• Keep remote controls out of reach of children.
See your dealer if you have questions.
CLEAR SPACE
3 FT. IN FRONT OF FIREPLACE
H. Before Lighting Fireplace
Before operating this fireplace for the first time, have a
qualified service technician:
• Verify all shipping materials have been removed from
inside and/or underneath the firebox.
• Reviewproperplacement oflogs, embermaterialand/or
other decorative materials.
• Check the wiring.
• Check the air shutter adjustment.
• Ensure that there are no gas leaks.
• Ensurethatthe glassis sealedandin theproper position
and that the integral barrier is in place.
WARNING! Risk of Fire/Asphyxiation! DO NOT oper-
ate fireplace with fixed glass assembly removed.

9
Heatilator • GBST4336I, GBFL4136I • 2135-900 • 2/08
I. Lighting Instructions (IPI)
The IPI system may be operated with two D-cell batteries. When using batteries, unplug the transformer. To prolong battery
life, remove them when using the transformer.
1. Turn off all electric power to the appliance.
2. This appliance is equipped with an ignition
device which automatically lights the burner.
DO NOT try to light the burner by hand.
3. Wait five (5) minutes to clear out any gas.
Then smell for gas, including near the floor. If
you smell gas, STOP! Follow “B” in the Safety
Information located on the left side of this la-
bel. If you do not smell gas, go to next step.
4. Turn on all electric power to the appliance.
5. To light the burner, flip the ON/OFF switch to
the “ON” position. (The ON/OFF switch may
include a wall switch if so equipped).
6. If the appliance will not operate, follow the in-
structions “To Turn Off Gas to Appliance” and
call your service technician or gas supplier.
LIGHTING
INSTRUCTIONS
(IPI)
TO TURN OFF
GAS TO APPLIANCE
1. Turn wall control or ON/OFF switch to “OFF”.
2. Turn off all electric power to the appliance if
service is to be performed.
FOR YOUR SAFETY
READ BEFORE LIGHTING
WARNING:Ifyoudonotfollow theseinstructions exactly,afireorexplosion
may result causing property damage, personal injury or loss of life.
CAUTION:
NOT FOR USE
WITH SOLID FUEL
WARNING:
593-913F
GAS
VALVE
For additional information on operating your
Hearth & Home Technologies fireplace, please refer to www.fireplaces.com.
A. This appliance is equipped with an
intermittent pilot ignition (IPI) device
which automatically lights the burn-
er. DO NOT try to light the burner by
hand.
B. BEFORELIGHTING,smellallaround
the appliance area for gas. Be sure to
smell next to the floor because some
gas is heavier than air and will settle
on the floor.
WHAT TO DO IF YOU SMELL GAS
• DO NOT try to light any appliance.
• DO NOT touch any electric switch; do
not use any phone in your building.
DO NOT CONNECT 110 VAC TO
THE CONTROL VALVE.
Improper installation, adjustment, al-
teration, service or maintenance can
cause injury or property damage. Re-
fer to the owner’s information manual
provided with this appliance.
This appliance needs fresh air for
safe operation and must be installed
so there are provisions for adequate
combustion and ventilation air.
If not installed, operated, and main-
tained in accordance with the man-
ufacturer’s instructions, this product
could expose you to substances in fuel
or fuel combustion which are known to
the State of California to cause can-
cer, birth defects, or other reproductive
harm.
Keep burner and control compartment
clean. See installation and operating
instructions accompanying appliance.
Hot while in operation. DO NOT touch.
Keepchildren,clothing,furniture,gaso-
lineandother liquids having flammable
vapors away.
DO NOT operate the appliance with
fixedglassassemblyremoved,cracked
or broken. Replacement of the fixed
glass assembly should be done by a
licensed or qualified service person.
• Immediately call your gas supplier
from a neighbor’s phone. Follow the
gas supplier’s instructions.
• If you cannot reach your gas sup-
plier, call the fire department.
C. DO NOT use this appliance if any
part has been under water. Imme-
diately call a qualified service tech-
nician to inspect the appliance and
to replace any part of the control
system and any gas control which
has been under water.
For use with natural gas and propane.
A conversion kit, as supplied by the
manufacturer, shall be used to convert
this appliance to the alternate fuel.
Also Certified for Installation in a
Bedroom or a Bedsitting Room.
For assistance or additional informa-
tion, consult a qualified installer, ser-
vice agency or the gas supplier.
Final inspection by

Heatilator • GBST4336I, GBFL4136I • 2135-900 • 2/08
10
Initial Break-in Procedure
• The fireplace should be run three to four hours
continuously on high.
• Turn the fireplace off and allow it to completely cool.
• Remove fixed glass assembly. See Section 14.K.
• Clean fixed glass assembly. See Section 3.
• Replace the fixed glass assembly and run continuously
on high an additional 12 hours.
This cures the materials used to manufacture the fire-
place.
NOTICE! Open windows for air circulation during fire-
place break-in.
• Some people may be sensitive to smoke and odors.
• Smoke detectors may activate.
J. After Fireplace is Lit
K. Frequently Asked Questions
ISSUE SOLUTIONS
Condensation on the glass This is a result of gas combustion and temperature variations. As the fireplace warms, this
condensation will disappear.
Blue flames This is a result of normal operation and the flames will begin to yellow as the fireplace is al-
lowed to burn for 20 to 40 minutes.
Odor from fireplace
When first operated, this fireplace may release an odor for the first several hours. This is
caused by the curing of materials from manufacturing. Odor may also be released from
finishing materials and adhesives used near the fireplace. These circumstances may require
additional curing related to the installation environment.
Film on the glass This is a normal result of the curing process of the paint and logs. Glass should be cleaned
within 3 to 4 hours of initial burning. A non-abrasive cleaner such as gas appliance glass
cleaner may be necessary. See your dealer.
Metallic noise Noise is caused by metal expanding and contracting as it heats up and cools down, similar to the sound produced by a furnace or heating duct. This noise does not affect the operation or
longevity of the fireplace.

11
Heatilator • GBST4336I, GBFL4136I • 2135-900 • 2/08
Glass Cleaning
Frequency: Seasonally
By: Homeowner
Tools Needed: Protective gloves, glass cleaner, drop
cloth and a stable work surface.
CAUTION! Handle fixed glass assembly with care.
Glass is breakable.
• Avoid striking, scratching or slamming glass
• Avoid abrasive cleaners
• DO NOT clean glass while it is hot
•Preparea workarea largeenough toaccommodate fixed
glass assembly and door frame by placing a drop cloth
on a flat, stable surface.
Note: Fixed glass assembly and gasketing may have res-
idue that can stain carpeting or floor surfaces.
•Remove door or decorative front from fireplace and set
aside on work surface.
• See Section 14.K for instructions to remove fixed glass
assembly.
• Clean glass with a non-abrasive commercially available
cleaner.
- Light deposits: Use a soft cloth with soap and water
- Heavy deposits: Use commercial fireplace glass
cleaner (consult with your dealer)
• Carefully set fixed glass assembly in place on fireplace.
Hold glass in place with one hand and secure glass
latches with the other hand.
• Reinstall door or decorative front.
3
3 Maintenance and Service
A. Maintenance Tasks-Homeowner
The following tasks may be performed annually by the
homeowner. If you are uncomfortable performing any of
the listed tasks, please call your dealer for a service ap-
pointment.
More frequent cleaning may be required due to lint from
carpeting or other factors. Control compartment, burner
and circulating air passageway of the fireplace must be
kept clean.
CAUTION!Risk ofBurns! Thefireplace shouldbeturned
off and cooled before servicing.
When properly maintained, your fireplace will give you
many years of trouble-free service. We recommend an-
nual service by a qualified service technician.
Doors, Surrounds, Fronts
Frequency: Annually
By: Homeowner
Tools needed: Protective gloves, stable work surface
• Assess condition of screen and replace as necessary.
• Inspect for scratches, dents or other damage and repair
as necessary.
•Check that louvers are not blocked.
• Vacuum and dust surfaces.
Remote Control
Frequency: Seasonally
By: Homeowner
Tools needed: Replacement batteries and remote con-
trol instructions.
• Locate remote control transmitter and receiver.
• Verify operation of remote. Refer to remote control
operation instructions for proper calibration and setup
procedure.
• Place batteries as needed in remote transmitters and
battery-powered receivers.
• Place remote control out of reach of children.
If not using your fireplace for an extended period of time
(summer months, vacations/trips, etc), to prevent unin-
tended operation:
• Remove batteries from remote controls.
• Unplug 3 volt adapter plug on IPI models.
Venting
Frequency: Seasonally
By: Homeowner
Tools needed: Protective gloves and safety glasses.
• Inspect venting and termination cap for blockage or
obstructionsuchplants, birdnests, leaves,snow,debris,
etc.
• Verify terminationcap clearanceto subsequentconstruc-
tion (building additions, decks, fences, or sheds). See
Section 6.
• Inspect for corrosion or separation.
• Verify weather stripping, sealing and flashing remains
intact.
• Inspect draft shield to verify it is not damaged or missing.
Any safety screen or guard removed for servicing must be
replaced prior to operating the fireplace.
Installation and repair should be done by a qualified service
technician only. The fireplace should be inspected before
use and at least annually by a professional service person.

Heatilator • GBST4336I, GBFL4136I • 2135-900 • 2/08
12
B. Maintenance Tasks-Qualified Service
Technician
The following tasks must be performed by a qualified ser-
vice technician.
Gasket Seal and Glass Assembly Inspection
Frequency: Annually
By: Qualified Service Technician
Tools needed: Protective gloves, drop cloth and a stable
work surface.
• Inspect gasket seal and its condition.
• Inspectfixed glassassembly forscratches andnicksthat
can lead to breakage when exposed to heat.
• Confirm there is no damage to glass or glass frame.
Replace as necessary.
• Verify that fixed glass assembly is properly retained and
attachment components are intact and not damaged.
Replace as necessary.
Logs
Frequency: Annually
By: Qualified Service Technician
Tools needed: Protective gloves.
• Inspectfordamagedormissinglogs. Replaceasnecessary.
Refer to Section 14 for log placement instructions.
• Verify correct log placement and no flame impingement
causing sooting. Correct as necessary.
Firebox
Frequency: Annually
By: Qualified Service Technician
Tools needed: Protective gloves, sandpaper, steel wool,
cloths, mineral spirits, primer and touch-up paint.
• Inspect for paint condition, warped surfaces, corrosion
or perforation. Sand and repaint as necessary.
• Replace fireplace if firebox has been perforated.
Control Compartment and Firebox Top
Frequency: Annually
By: Qualified Service Technician
Tools needed: Protective gloves, vacuum cleaner, dust
cloths
• Vacuum and wipe out dust, cobwebs, debris or pet hair.
Usecautionwhen cleaning these areas. Screwtipsthat
have penetrated the sheet metal are sharp and should
be avoided.
• Remove all foreign objects.
• Verify unobstructed air circulation.
Burner Ignition and Operation
Frequency: Annually
By: Qualified Service Technician
Tools needed: Protective gloves, vacuum cleaner, whisk
broom, flashlight, voltmeter, indexed drill bit set, and a
manometer.
• Verify burner is properly secured and aligned with pilot
or igniter.
• Cleanoff burnertop, inspectforplugged ports,corrosion
or deterioration. Replace burner if necessary.
• Replace ember materials with new dime-size pieces.
DO NOT block ports or obstruct lighting paths. Refer to
Section 14 for proper ember placement.
• Verify batteries have been removed from battery back-
up IPI systems to prevent premature battery failure or
leaking.
• Check for smooth lighting and ignition carryover to all
ports. Verify that there is no ignition delay.
• Inspect for lifting or other flame problems.
• Verify air shutter setting is correct. See Section 14 for
required air shutter setting. Verify air shutter is clear of
dust and debris.
• Inspect orifice for soot, dirt and corrosion. Verify orifice
size is correct. See Service Parts List for proper orifice
sizing.
• Verify manifold and inlet pressures. Adjust regulator as
required.
• Inspect pilot flame pattern and strength. See Figure 3.1
and 3.3 for proper pilot flame pattern. Clean or replace
orifice spud as necessary.
• Inspect IPI flame sensing rod for soot, corrosion and
deterioration. Clean with emery cloth or replace as
required.
• Verify IPI millivolt output. Replace as necessary.
Figure 3.1 IPI Pilot Flame Patterns

13
Heatilator • GBST4336I, GBFL4136I • 2135-900 • 2/08
A. Typical Appliance System
NOTICE: Illustrations and photos reflect typical installations and are for design purposes only. Illustrations/diagrams are not
drawn to scale. Actual product may vary from pictures in manual
CEILING FIRESTOP
ON FLOOR OF ATTIC
(SECTION 8B)
LISTED B-VENT TERMINATION CAP
(SECTION 4D)
VENT PIPE PENETRATES ROOF
PREFERABLY WITHOUT AFFECTING
ROOF RAFTERS (SECTION 8B)
FRAMING HEADED OFF
IN CEILING JOISTS
(SECTION 8B)
GAS LINE
(SECTION 11)
MANTEL AND
MANTEL LEG
(SECTION 5)
SURROUND
HEARTH EXTENSION
VENT PIPE (SECTION 7 & 8)
OPTIONAL
WALL SWITCH
STORM COLLAR
(SECTION 4D)
NON-COMBUSTIBLE ROOF FLASHING
MAINTAINS MINIMUM CLEARANCE
AROUND PIPE
FRAMING/HEADER
(SECTION 5)
ATTIC INSULATION SHIELD (NOT SHOWN)
MUST BE USED HERE TO KEEP
INSULATION AWAY FROM VENT PIPE IF
ATTIC IS INSULATED (SECTION 10D)
NOTE: MUST TERMINATE VERTICALLY
Figure 4.1 Typical System
4
4 Getting Started
Installer Guide
PRODUCT SPECIFIC

Heatilator • GBST4336I, GBFL4136I • 2135-900 • 2/08
14
B. Design and Installation Considerations
Heatilator B-type vent gas appliances are designed to op-
erate with all exhaust gases expelled to the outside of the
building, and combustion air pulled from the room.
Installation MUST comply with local, regional, state and
national codes and regulations. Consult insurance carrier,
local building inspector, fire officials 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 configuration to be used.
• Gas supply piping.
• Electrical wiring requirements.
• Framing and finishing details.
• Whether optional accessories—devices such as a fan,
wall switch, or remote control—are desired.
D. Inspect Appliance and Components
The following B-vent components are needed for installa-
tion (see Figure 4.2).
• Fireplace Box
• Pipe Components
• Firestops
• Attic Insulation Shield
• Elbows
• Strapping
• Roof Flashing or Chase Top
• Termination Cap
• Storm Collar
• Carefully remove the appliance and components from
the packaging.
C. Tools and Supplies Needed
Before beginning the installation be sure that the following
tools and building supplies are available.
Tape measure Framing material
Pliers High temperature caulking material
Hammer Phillips screwdriver
Gloves Framing square
Voltmeter Electric drill and bits (1/4 in.)
Plumb line Safety glasses
Level Reciprocating saw
Manometer Flat blade screwdriver
Noncorrosive leak check solution
1/2 - 3/4 in. length, #6 or #8 Self-drilling screws
One 1/4 in. female connection (for optional fan).
WARNING! Risk of Fire, Explosion or Electric Shock!
DO NOT USE THIS APPLIANCE IF ANY PART HAS
BEEN UNDER WATER. Call a qualified technician to in-
spect the appliance and to replace any part of the control
system and/or gas control which has been under water.
Improper installation, adjustment, alteration, service or
maintenance can cause injury or property damage. For
assistance or additional information, consult a qualified
service technician, service agency or your dealer.
Hearth& HomeTechnologies disclaimsanyresponsibilityfor,
and the warranty will be voided by, the following actions:
• Installation and use of any damaged appliance or vent
system component.
• Modification of the appliance or vent system.
• Installation other than as instructed by Hearth & Home
Technologies.
• Improper positioning of the gas logs or the glass door.
• Installationand/or use of anycomponentpartnotapproved
by Hearth & Home Technologies.
Any such action may cause a fire hazard.
Figure 4.2 Typical Vertical Installation
LISTED B-VENT
TERMINATION CAP
STORM COLLAR
ROOF FLASHING
OR CHASE TOP
FIRESTOP
SPACER
GAS B-VENT
SECTION
• The vent system components and decorative doors and
fronts may be shipped in separate packages.
• If packaged separately, the log set and appliance grate
must be installed.
• Report to your dealer any parts damaged in shipment,
particularly the condition of the glass.
•Read all of the instructions before starting the instal-
lation. Follow these instructions carefully during the
installation to ensure maximum safety and benefit.
WARNING! Risk of Fire or Explosion! Damaged parts
could impair safe operation. DO NOT install damaged, in-
complete or substitute components. Keep appliance dry.

15
Heatilator • GBST4336I, GBFL4136I • 2135-900 • 2/08
Figure 4.2
E. Negative Pressure
WARNING! Asphyxiation Risk! Negative pressure can
cause spillage of combustion fumes and soot. Fireplace
needs to draft properly for safety.
Draft is the pressure difference needed to vent fireplaces
successfully. Considerations for successful draft include:
• Preventing negative pressure
• Location of fireplace and chimney
Negative pressure results from the imbalance of air
available for the fireplace to operate properly. Causes for
this imbalance include:
• Exhaust fans (kitchen, bath, etc.)
• Range hoods
• Combustionair requirementsforfurnaces,waterheaters
and other combustion appliances
• Clothes dryers
• Location of return-air to furnace or air conditioning
• Imbalances of the HVAC air handling system
• Upper level air leaks (recessed lighting, attic hatch
opening, duct leaks)
To minimize the effects of negative air pressure, the fol-
lowing must be considered:
• Install the fresh air kit. Install the intake on the side of
the house towards prevailing winds during the heating
season.
• Ensure adequate outdoor air is supplied for combustion
appliances and exhaust equipment.
• Ensure furnace and air conditioning return vents are not
located in the immediate vicinity of the fireplace.
• Avoid installing the fireplace near doors, walkways or
small isolated spaces.
• Recessedlightingshould beof “sealedcan”design; attic
hatches weather stripped or sealed; and attic mounted
ductwork and air handler joints and seams taped or
sealed.
• Basement installations should be avoided due to stack
effect. Stack effect creates negative pressure in lower
levels. Hearth & Home Technologies recommends the
use of direct vent fireplaces in basements.
Location of the fireplace and chimney will affect perfor-
mance. As shown in Figure 4.2, the chimney should:
• Be installed through the warm space enclosed by the
building envelope. This helps to produce more draft,
especially during lighting and die-down of the fire.
• Penetratethehighest partof theroof.Thisminimizes the
effects of wind turbulence.
• Belocatedaway fromtrees, adjacentstructures,uneven
roof lines and other obstructions.
Offsets can restrict draft so their use should be minimized.
Consider the fireplace location relative to floor and ceiling
and attic joists.
Recommended
Location
Marginal
Location
Location
Not
Recommended
Recommended
Location
Location NOT
Recommended
Multi-level Roofs
Windward Leeward

Heatilator • GBST4336I, GBFL4136I • 2135-900 • 2/08
16
MINIMUM CLEARANCE
36 in.
914 mm
MINIMUM CLEARANCE
36 in.
914 mm
GBFL4136I
GBST4336I
MINIMUM CLEARANCE
36 in.
914 mm
MINIMUM
CLEARANCE
36 in.
914 mm
5
5 Framing and Clearances
A. Selecting Appliance Location
When selecting alocation for the applianceit is importantto
consider the required clearances to walls (see Figure 5.1).
WARNING! Risk of Fire or Burns! Provide adequate
clearance around air openings and for service access.
Due to high temperatures, the appliance should be locat-
ed out of traffic and away from furniture and draperies.
NOTICE: Illustrations reflect typical installations and are
FOR DESIGN PURPOSES ONLY. Illustrations/diagrams
are not drawn to scale.Actual installation may vary due to
individual design preference.
Figure 5.1 Appliance Locations

17
Heatilator • GBST4336I, GBFL4136I • 2135-900 • 2/08
C
B
D
A
B. Constructing the Appliance Chase
Achase is a vertical box-like structure built to enclose the
gas appliance and/or its vent system. In cooler climates
the vent should enclosed inside the chase.
NOTICE: Treatment of ceiling firestops and wall shield
firestops 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.
Chases should be constructed in the manner of all out-
side 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 floor of the chase
should be insulated. Vapor and air infiltration barriers
should be installed in the chase as per regional codes for
the rest of the home. Additionally, in regions where cold
air infiltration may be an issue, the inside surfaces may be
sheetrocked and taped for maximum air tightness.
Figure 5.2 Clearances to Combustibles, Model GBST4336I
C. Clearances
NOTICE: Installapplianceon hardmetal or woodsurfaces
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 specified air space
clearances to appliance and vent pipe:
• Insulationand othermaterialsmustbesecured toprevent
accidental contact.
• Failuretomaintain airspacemaycause overheatingand
a fire.
To further prevent drafts, the wall shield and ceiling fire-
stops should be caulked with high temperature caulk to
seal gaps. Gas line holes and other openings should be
caulked with high temp caulk or stuffed with unfaced in-
sulation. If the appliance is being installed on a cement
slab, a layer of plywood may be placed underneath to
prevent conducting cold up into the room.
MINIMUM FRAMING DIMENSIONS*
GBST4336I
A B C* D E F G H I J
Rough
Opening
(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
Inches 7 38-1/2 23 43 31-5/8 0 0 36 1/2 36
Millimeters 178 978 584 1092 803 0 0 914 13 914
* Adjust framing dimensions for interior sheathing (such as sheetrock)
I
F
G
E
J
H

Heatilator • GBST4336I, GBFL4136I • 2135-900 • 2/08
18
C
A
B
D
* Adjust framing dimensions for interior sheathing (such as sheetrock)
**See pipe manufacturer’s installation instructions
MINIMUM FRAMING DIMENSIONS*
GBFL4136I
ABC*DE F GHI
Rough
Opening
(Vent Pipe)
Rough
Opening
(Height)
Rough
Opening
(Depth)
Rough
Opening
(Width)
Clearance
to Ceiling Combustible Floor Combustible Flooring End of Appliance Sides of Appliance
Inches ** 38-1/2 23 41 31-5/8 0 0 1/2 36
Millimeters ** 978 584 1041 803 0 0 13 914
E
G
H
I
F
I
Figure 5.3 Clearances to Combustibles, Model GBFL4136I

19
Heatilator • GBST4336I, GBFL4136I • 2135-900 • 2/08
MEASUREMENTS FROM
TOP EDGE OF THE OPENING
510 11 12
2-1/2
13 14
15 16 17 18 19
32
TO CEILING
91011 12
8
7
6
5
4
3
25
18
D. Mantel and Wall Projections
WARNING! Risk of Fire! Comply with all minimum clear-
ances to combustibles as specified. Framing or finishing
material closer than the minimums listed must be construct-
ed entirely of noncombustible materials (i.e., steel studs,
concrete board, etc).
Figure 5.4 Minimum Clearances to Combustible Mantels
or Other Combustibles Above Appliance
Note: All
measurements
in inches.
GBST4336I Mantel Projection
TOP VIEW
3-1/4 in.
MIN.
2-7/16
in. MIN.
1/2 in.
MIN.
UNLIMITED
1 in.
MAX.
Figure 5.6 Clearances to Combustible Mantel Legs or Wall
Projections (Acceptable on both sides of opening.)
Note: Clearance from
opening to perpendicular
wall.
Combustible Mantel Legs or Wall Projections
Figure 5.7 Non-Combustible Zone
SHEETROCK
AIR SPACE REQUIRED
3-1/4 in.
MEASUREMENTS FROM
TOP EDGE OF THE OPENING
510 11 12
1
13 14
15 16 17 18 19
32
TO CEILING
91011 12
8
7
6
5
4
3
25
18
Note: All
measurements
in inches.
Figure 5.5 Minimum Clearances to Combustible Mantels
or Other Combustibles Above Appliance
GBFL4136I Mantel Projection

Heatilator • GBST4336I, GBFL4136I • 2135-900 • 2/08
20
Figure 6.3 Leveled Termination Caps
A. Vent Termination Minimum Clearances
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
Figure 6.1 Minimum Height From Roof To Lowest Discharge
Opening
* 3 foot minimum in snow regions
6
6 Termination Locations
Fire Risk.
Maintain vent clearance to combustibles as
specified.
• DO NOT packair space withinsulationor other
materials.
Failure to keep insulation or other materials away
from vent pipe may cause overheating and fire.
WARNING
B-VENT GAS, WOOD OR FUEL
OIL TERMINATION
A
GAS
TERMINATION
B
C
Termination Wood & Fuel Oil
Termination Comments
A6 in. 20 in. min. Horizontal distance between terminations
B8 ft. 8 ft. min. Distance to perpendicular wall
C18 in. 18 in. Vertical distance between terminations
Figure 6.2 Staggered Termination Caps
VERTICAL
WALL
LISTED B-VENT
TERMINATION
CAP
12 X
ROOF PITCH
IS X/ 12
LOWEST
DISCHARGE
OPENING
H (MIN.) - MINIMUM HEIGHT FROM ROOF
TO LOWEST DISCHARGE OPENING
8 FEET
B-VENT GAS, WOOD OR FUEL
OIL TERMINATION
8 FT.
(2.4 M)
(MINIMUM) TO
PERPENDICULAR
WALL
(GAS ONLY)
WOOD OR
GAS TERMINATION
20 IN. MIN. *
(508 MM)
* IF USING DECORATIVE CAP COVER(S), THIS DISTANCE MAY
NEED TO BE INCREASED. REFER TO THE INSTALLATION
INSTRUCTIONS SUPPLIED WITH THE DECORATIVE CAP COVER.