Heat & Glo GEM-42B User manual

Heat & Glo • GEM-42B • 2096-900 Rev. H • 3/06 1
Model:
GEM-42B
Owner’s Manual
Installation and Operation
• Donotstoreorusegasolineorotherflamma-
blevaporsand liquids in thevicinityof this or
anyother appliance.
• What to do if you smell gas
- Donottry to lightanyappliance
- Do not touch any electrical switch. Do not
useany phonein yourbuilding.
- Immediately call your gas supplier from a
neighbor’sphone.Followthegassupplier’s
instructions.
- If you cannot reach your gas supplier, call
thefire department.
• Installationandservicemustbeperformedby
aqualifiedinstaller,serviceagency,orthegas
supplier.
WARNING: Ifthe information inthese
instructionsis notfollowed exactly,a fire
or explosion may result causing proper-
ty damage, personal injury, or death.
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!DONOTTOUCH.
SEVEREBURNSMAYRESULT.
CLOTHINGIGNITIONMAYRESULT.
WARNING
• Keep children away.
• CAREFULLY SUPERVISE children in same room as
appliance.
• Alert children and adults to hazards of high
temperatures.
• Do NOT operate with protective barriers open or
removed.
• Keep clothing, furniture, draperies and other
combustibles away.
Glass and other surfaces are hot during
operation and cool down.
DO NOT DISCARD THIS MANUAL
CAUTION
Important operating
and maintenance
instructions included.
This appliance may be installed as an OEM installation in
manufactured home (USA only) or mobile home and must
be installed in accordance with the manufacturer’s instruc-
tions and the manufactured home construction and safety
standard, Title 24 CFR, Part 3280 or Standard for Installa-
tion in Mobile Homes, CAN/CSA Z240MH.
This appliance is only for use with the type(s) of gas indi-
cated on the rating plate.
Installation and service of this appliance should be
performed by qualified personnel. Hearth & Home
TechnologiessuggestsNFIcertified orfactory-trained
professionals, or technicians supervised
by an NFI certified professional.
•••
DO NODO NO
DO NODO NO
DO NOTT
TT
T
DISCARDDISCARD
DISCARDDISCARD
DISCARD
Read, understand and follow
these instructions for safe
installation and operation.
Leave this manual with
party responsible for
use and operation.
Í
IntheCommonwealthof Massachusetts:
• installation must be performed by a licensed plumber
or gas fitter;
SeeTableofContentsforlocationof additional
CommonwealthofMassachusettsrequirements.

Heat & Glo • GEM-42B • 2096-900 Rev. H • 3/062
Congratulations
Listing Label Information/Location
Model Name:___________________________________________ Datepurchased/installed: _________________
Serial Number: _________________________________________ Location on appliance: ____________________
Dealership purchased from: _______________________________ DealerPhone: __________________________
Notes: _______________________________________________________________________________________
____________________________________________________________________________________________
Congratulations on selecting a Heat & Glo gas appliance
—an elegant and clean alternative to wood burning
appliances.TheHeat & Glogasappliance you have
selected is designed to provide the utmost in safety,
reliability, and efficiency.
As the owner of a new appliance, 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.
ThisOwner’sManualshouldberetainedfor futurereference.
We suggest that you keep it with your other important
documentsandproduct manuals.
Theinformationcontained inthisOwner’sManual,unless
noted otherwise, applies to all models and gas control
systems.
Your new Heat & Glo gas appliance will give you years of
durableuseandtrouble-freeenjoyment.Welcometo theHeat
&Glofamilyof appliance products!
Read this manual before installing or operating this appliance.
Please retain this owner’s manual for future reference.
We recommend that you record the following
pertinent information about your appliance.
Gas and Electric
Information
Model Number
Serial Number
Type of Gas
The model information regarding your specific appliance can be found on
the rating plate usually located in the control area of the appliance.
Homeowner Reference Information
Heat & Glo, a of Hearth & Home Technologies, Inc. brand
20802 Kensington Boulevard, Lakeville, MN 55044
Not for use with solid fuel.
(Ne doit pas entre utilise avec un combustible solide).
This appliance must be installed in accordance with local codes, if any; if not, follow ANSI Z223.1
intheUSAor CAN/CGA B149installation codes.(Installer l’appareil selonlescodesou reglements
locaux ou, en l’absence de tels reglements, selon les codes d’installation CAN/CGA-B149.)
Type of Gas (Sorte De Gaz):
NATURAL GAS
MADE IN USA
Minimum Permissible Gas Supply for Purposes of Input Adjustment.
Approved Minimum (DeGaz)Acceptable 0.0 in w.c. (Po.Col.d’eau)
Maximum Pressure (Pression) 0.0 in w.c. (Po. Col.d’eau)
Maximum Manifold Pressure (Pression) 0.0 in w.c. (Po. Col.d’eau)
Minimum ManifoldPressure(Pression) 0.0 in w.c. (Po. Col.d’eau)
Model:
(Modele):
Serial
(Serie):
ANSI Z21XX-XXXX · CSA 2.XX-MXX · UL307B
XXXXXXXX
INCANADA
ALTITUDE: 0-0000 FT. 0000-0000FT.
MAX.INPUTBTUH: 00,000 00,000
MIN. INPUT BTUH: 00,000 00,000
ORIFICE SIZE: #XXXXX #XXXXX
XXXXXXXX
Total Electrical Requirements: 000Vac, 00Hz., less than 00 Amperes
This product ma
y
be covered b
y
one or more of the followin
g
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).
Where everything comes together

Heat & Glo • GEM-42B • 2096-900 Rev. H • 3/06 3
- Table of Contents -
Î= Containsupdatedinformation.
Section 1: Listing and Code Approvals
A. Appliance Certification ................................. 4
B. BTU Specifications .......................................4
C. High Altitude Installations............................. 4
D. Non-Combustible Materials Specification ...4
E. Combustible Materials Specification ........... 4
F. Requirements for the Commonwealth
of Massachusetts.........................................5
Section 2: Getting Started
A. Design and Installation Considerations...... 5
B. Tools and Supplies Needed ........................ 5
C. Inspect Appliance and Components............ 5
Section 3: Framing and Clearances
A. Selecting Appliance Location .......................7
B. Constructing the Appliance Chase .............. 8
C. Clearances...................................................8
D. Mantel Projections ........................................9
E. Hearth Extension .......................................... 9
Section 4: Termination Locations
A.Vent Termination Minimum Clearances ....10
Section 5: Vent Information and Diagrams
A. Vent Table Key ............................................12
B. Use of Elbows ............................................12
C. Measuring Standards .................................12
D. Vent Diagrams............................................13
Section 6: Vent Clearances and Framing
A. Pipe Clearances to Combustibles ............16
B. Wall Penetration Framing ..........................16
C. Vertical Penetration Framing ......................17
Section 7: Appliance Preparation
A. Removing Non-combustible Facing..........18
B. Securing and Leveling the Appliance.........19
C. Installing Non-combustible Facing............19
D. Installing Flue Restrictors ..........................20
E. Adjusting Pilot Shield .................................20
Section 8: Installing Vent Pipe
A. Assembly of Vent Sections .........................21
B. Disassembly of Vent Sections ...................23
C. Installing Heat Shield & Termination Cap .24
D. Installing Roof Flashing and Vertical
Termination Cap.........................................25
Section 9: Gas Information
A. Fuel Conversions ....................................27
B. Gas Pressures ........................................27
C. Gas Connection.......................................27
Section 10: Electrical Information
A. Recommendation for Wire ......................29
B. Connecting to the Appliance....................29
C. Intellifire Ignition System Wiring ..............29
D. Junction Box Installation ..........................31
Section 11: Finishing
A. Mantel Projections ...................................32
B.Facing Material ........................................32
C. Finishing Material Requirements............33
D. Hearth Extension .....................................34
Section 12: Appliance Setup
A. Remove Shipping Materials ....................35
B. Clean the Appliance.................................35
C. Accessories .............................................35
D. Ember Placement....................................36
E. Positioning the Logs ...............................37
F. Glass Assembly.......................................40
G. Grilles and Trim .......................................40
H. Air Shutter Setting ....................................40
Section 13: Operating Instructions
A. Before Lighting Appliance........................41
B. Lighting Appliance ...................................42
C. After Appliance is Lit.................................43
D. Frequently Asked Questions ...................43
Section 14: Troubleshooting
A. Intellifire Ignition System .........................44
Section 15: Maintainingand Servicing Appliance. ...........46
Section 16: Reference Materials
A. Appliance Dimensions Diagram.............48
B. Vent Components Diagrams...................49
C. Service Parts ............................................52
D. Warranty ...................................................55
E. Contact Information..................................56
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Heat & Glo • GEM-42B • 2096-900 Rev. H • 3/064
A. Appliance Certification
NOTE: 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.
NOTINTENDED FOR USEASAPRIMARYHEAT 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.
Listing and Code Approvals
C. HighAltitude Installations
U.L.Listedgasappliancesare testedandapproved without
requiring changes for elevations from 0 to 2000 feet in the
U.S.A. and Canada.
When installing this appliance at an elevation above 2000
feet, it may be necessary to decrease the input rating by
changingtheexistingburner orifice to asmallersize.Input
rate should be reduced by 4% for each 1000 feet above a
2000 foot elevation in the U.S.A., or 10% for elevations
between2000and4500feet inCanada.Iftheheating value
of the gas has been reduced, these rules do not apply. To
identify the proper orifice size, check with the local gas
utility.
If installing this appliance at an elevation above 4500 feet
(in Canada), check with local authorities.
B. BTU Specifications
1
MODEL: GEM-42B
LABORATORY: Underwriters Laboratories, Inc. (UL)
TYPE: Direct Vent Gas Fireplace Heater
STANDARD: ANSI Z21.88-2002•CSA2.33-M02•UL307B
Model
(U.S. or Canada)
Maximum
Input BTUH Minimum Input BTUH
Orifice
Size
(DMS)
GEM-42B (NG)
US
(0-2000 FT) 47,000 35,000 29
CAN
(2000-4500 FT) 42,300 31,500 30
WARNING
Do NOT use this appliance if any part has been under
water. Immediately call a qualified service technician to
inspectthe applianceand toreplace any partofthe control
system and any gas control which has been under water.
This product is listed to ANSI standards for “Vented Gas
Appliance Heaters” and applicable sections of “Gas Burn-
ingHeatingAppliances forManufacturedHomes and Rec-
reational Vehicles”, and “Gas Fired Appliances for Use at
HighAltitudes”.
Heat & Glo Quality Systems
registeredbySGSICS
This model may be installed in a bedroom or bed-sitting
room in the U.S.A. and Canada. D. Non-Combustible Materials Specification
Material which will not ignite and burn. Such materials are
thoseconsistingentirelyofsteel, iron, brick, tile,concrete,
slate, glass or plasters, or any combination thereof.
Materialsthatarereported as passingASTM E 136, Stan-
dard Test Method for Behavior of Materials in a Verti-
cal Tube Furnace at 750oC, shallbe considerednon-com-
bustiblematerials.
E. Combustible Materials Specification
Materials made of or surfaced with wood, compressed pa-
per, plant fibers, plastics, or other material that can ignite
andburn,whetherflameproofedornot,orwhetherplastered
orunplasteredshall beconsideredcombustiblematerials.

Heat & Glo • GEM-42B • 2096-900 Rev. H • 3/06 5
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)
feetabovefinished gradeinthe area oftheventing, includ-
ing but not limited to decks and porches, the following re-
quirements shall be satisfied:
Installation of Carbon Monoxide Detectors
Atthetimeof installation of thesidewall horizontal vented
gas fueled equipment, the installing plumber or gasfitter
shallobservethatahard wired carbon monoxidedetector
with an alarm and battery back-up is installed on the floor
level where the gas equipment is to be installed. In addi-
tion,theinstallingplumber or gasfitter shallobservethata
battery operated or hard wired carbon monoxide detector
with an alarm is installed on each additional level of the
dwelling,buildingorstructure served bythesidewall hori-
zontalventedgas fueledequipment.It shallbethe respon-
sibilityofthe propertyownerto securetheservices ofqual-
ifiedlicensedprofessionalsforthe installationofhard wired
carbonmonoxidedetectors.
In the event that the side wall horizontally vented gas fu-
eledequipmentisinstalled in acrawlspace or anattic,the
hard wired carbon monoxide detector with alarm and bat-
tery 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
ownershallhave a periodofthirty (30)daysto comply with
theaboverequirements;provided, however,thatduringsaid
thirty(30)day period, abatteryoperated carbonmonoxide
detector with an alarm shall be installed.
Approved Carbon Monoxide Detectors
Eachcarbonmonoxide detectorasrequired inaccordance
withtheabove provisions shallcomplywithNFPA720 and
beANSI/UL2034 listed and IAS certified.
Signage
Ametalorplasticidentification plate shall bepermanently
mountedtothe exteriorofthe buildingata minimumheight
of eight (8) feet above grade directly in line with the ex-
haust vent terminal for the horizontally vented gas fueled
heating appliance or equipment. The sign shall read, in
print size no less than one-half (1/2) inch in size, “GAS
VENT DIRECTLY BELOW. KEEP CLEAR OF ALL OB-
STRUCTIONS”.
Inspection
Thestateorlocal gasinspectorofthe sidewallhorizontally
ventedgasfueled equipmentshallnotapprove theinstalla-
tion unless, upon inspection, the inspector observes car-
bonmonoxidedetectorsandsignageinstalledin accordance
withtheprovisions of 248CMR5.08(2)(a)1 through 4.
Exemptions
Thefollowingequipmentisexemptfrom248CMR5.08(2)(a)1
through4:
• Theequipmentlistedin Chapter 10entitled“Equipment
Not Required To Be Vented” in the most current edition
of NFPA54 as adopted by the Board; and
• ProductApproved side wall horizontally vented gas fu-
eledequipmentinstalled inaroomor structureseparate
fromthedwelling,buildingor structure used inwholeor
inpartforresidential purposes.
MANUFACTURERREQUIREMENTS
Gas Equipment Venting System Provided
Whenthemanufacturerof ProductApproved sidewallhor-
izontally vented gas equipment provides a venting system
designorventingsystem components with theequipment,
the instructions provided by the manufacturer for installa-
tionoftheequipment and theventingsystemshall 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
ventingsystem.
Gas Equipment Venting System NOT Provided
When the manufacturer of a Product Approved side wall
horizontallyventedgasfueled equipment doesnotprovide
the parts for venting the flue gases, but identifies “special
venting systems”, the following requirements shall be sat-
isfiedbythemanufacturer:
• Thereferenced“specialventingsystem”instructionsshall
beincludedwiththe applianceorequipmentinstallation
instructions;and
• The“special ventingsystems”shallbeProductApproved
by the Board, and the instructions for that system shall
includeapartslist and detailed installationinstructions.
AcopyofallinstallationinstructionsforallProductApproved
sidewallhorizontally ventedgasfueledequipment,all vent-
ing instructions, all parts lists for venting instructions, and/
or all venting design instructions shall remain with the ap-
pliance or equipment at the completion of the installation.
See Gas Connection section for additional Common-
wealth of Massachusetts requirements.
NOTE: The following requirements reference various
Massachusetts and national codes not contained in
this document.
F. Requirements for the Commonwealth of
Massachusetts
Î

Heat & Glo • GEM-42B • 2096-900 Rev. H • 3/066
A. Design and Installation Considerations
Heat&Glodirect vent gas appliancesaredesignedto op-
erate with all combustion air siphoned from outside of the
buildingandallexhaust gases expelled totheoutside.No
additionaloutsideairsourceis required.
Getting Started
C. Inspect Appliance and Components
2
When planning an appliance installation, it’s necessary to
determine the following information before installing:
•Where the appliance is to be installed.
•The vent system configuration to be used.
•Gas supply piping.
•Electrical wiring.
•Framing and finishing details.
•Whether optional accessories—devices such as a fan,
wall switch, or remote control—are desired.
B. Tools and Supplies Needed
Before beginning the installation be sure that the following
tools and building supplies are available.
Reciprocating saw Framing material
Pliers Hi temp caulking material
Hammer Gloves
Phillips screwdriver Framing square
Flat blade screwdriver Electric drill and bits (1/4 in.)
Plumb line Safety glasses
Level 1/2 - 3/4 inch length, #6 or #8 Self-drilling screws
Manometer Voltmeter
Tape measure Noncorrosiveleakchecksolution
One 1/4 inch female connection (for optional fan).
• Carefully remove the appliance and components from
the packaging.
• Theventsystemcomponentsand trimdoorsareshipped
in separate packages.
• Thegas logs maybe packagedseparatelyandmust be
field installed.
• Report to your dealer any parts damaged in shipment,
particularly the condition of the glass.
• Read all of the instructions before starting the in-
stallation. Follow these instructions carefully dur-
ing the installation to ensure maximum safety and
benefit.
Check building codes prior to installation.
• Installation MUST comply with local, regional, state
and national codes and regulations.
• Consult local building, fire officials or authorities
having jurisdiction about restrictions, installation
inspection, and permits.
CAUTION
Keep appliance dry.
• Mold or rust may cause odors.
• Water may damage controls.
WARNING
Inspect appliance and components for
damage. Damaged parts may impair safe
operation.
WARNING
• Do NOT install damaged components.
• Do NOT install incomplete components.
• Do NOT install substitute components.
Report damaged parts to dealer.
Hearth & Home Technologies disclaims
any responsibility for, and the warranty will
be voided by, the following actions:
WARNING
• 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.
• Installation and/or use of any component part not
approved by Hearth & Home Technologies.
Any such action may cause a fire hazard.

Heat & Glo • GEM-42B • 2096-900 Rev. H • 3/06 7
3Framing and Clearances
NOTE:
•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.
WARNING
Fire Risk
Provide adequate clearance:
• Around air openings
• To combustibles
• For service access
Locate appliance away from traffic areas.
A. Selecting Appliance Location
When selecting a location for your appliance it is important
toconsiderthe requiredclearancesto walls(seeFigure 3.1).
Figure 3.1 Appliance Locations
ABCDEFG
Inches 55-1/4 47-1/2 78-1/2 36 65-1/2 1/2 18
Millimeters 1403 1207 1994 914 1664 13 457
NOTE: For actual appliance dimensions refer to Sec-
tion 16.
In addition to these framing dimensions, also reference the
following sections:
• Clearances and Mantel Projections (Sections 3.C and 3.D)
• Vent Clearances and Framing (Section 6).
A
A
F
C
TOP VENT,
ONE 90 ELBOW
0
B
D
E
ALCOVE
INSTALLATION
A
C
REAR VENT,
ONE ELBOW
B
A
REAR VENT,
NO ELBOWS
B
G

Heat & Glo • GEM-42B • 2096-900 Rev. H • 3/068
B. Constructing the Appliance Chase
A chase is a vertical boxlike structure built to enclose the
gas appliance and/or its vent system. Vertical vents that
run on the outside of a building may be, but are not re-
quired to be, installed inside a chase.
Construction of the chase may vary with the type of building.
Theseinstructionsarenotsubstitutes for the requirementsof
localbuildingcodes.LocalbuildingcodesMUST bechecked.
Chasesshouldbeconstructed in the mannerofalloutside
walls of the home to prevent cold air drafting problems.
The chase should not break the outside building envelope
in any manner.
Walls, ceiling, base plate and cantilever floor of the chase
shouldbeinsulated.Vapor andair infiltrationbarriersshould
be installed in the chase as per regional codes for the rest
of the home. Additionally, in regions where cold air infiltra-
tionmaybeanissue,theinsidesurfacesmaybesheetrocked
and taped for maximum air tightness.
Tofurtherpreventdrafts,thewall shieldand ceilingfirestops
shouldbecaulkedwithhigh temperaturecaulk tosealgaps.
Gas line holes and other openings should be caulked with
C. Clearances
Figure 3.2 Clearances to Combustibles
Fire Risk.
Odor Risk.
•Install appliance on hard metal or wood
surfaces extending full width and depth of
appliance.
•Do NOT install appliance directly on
carpeting, vinyl, tile or any combustible
material other than wood.
WARNING
CLEARANCES TO COMBUSTIBLES:
ABCDE F GHIJ
Rough
Opening
(Vent Pipe)
Rough
Opening
(Height)
Rough
Opening
(Depth)
Rough
Opening
(Width)
Clearance
to Ceiling Non-Combustible Floor Combustible Flooring Behind Appliance Sides of Appliance Front of Appliance
Inches 10 47-3/4 17-1/2 47-1/2 48 0 8 1/2 1/2 36
mm 254 1213 445 1207 1219 0 203 13 13 914
Fire Risk.
•Construct chase to all clearance
specifications in manual.
•Locate and install appliance to all
clearance specifications in manual
WARNING
high temp caulk or stuffed with unfaced insulation. 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.
G
F
KI
J
FROM TOP OF ARCH
OPENING TO CEILING
H
A
B
C
D
Î

Heat & Glo • GEM-42B • 2096-900 Rev. H • 3/06 9
D. Mantel Projections
Figure 3.3 Clearances to Mantels or other
Combustibles above Appliance
Figure 3.4 Clearances to Mantel Legs or Wall Projections
(Acceptable on both sides of opening.)
COMBUSTIBLE
FACING MATERIAL
CEILING
FIREPLACE
HEADER
1" 2" 3" 4" 5" 6" 7" 8" 9"10"
11"
12"
1 in. Typical
36-5/8 in. Min.
From top of arch
opening to ceiling
17 in. Min.
From top of arch
opening to first
mantel projection
NON-COMBUSTIBLE
FACING
MATERIAL
TOP OF ARCH OPENING
½ in.
5
3
2
1
MANTEL
LEG
Top View
4
12345
Note: Dimension are
shown in inches.
Fire Risk.
Hearth extension required to protect
combustible floors in front of appliance.
WARNING
•An 8 inch minimum hearth extension must be
constructedofnon-combustible material.
E. Hearth Extension
A
B
Figure 3.6 Hearth Extension Dimensions
AB
in. 47-1/2 8
mm 1207 203
Î
ÎFigure 3.5
COMBUSTIBLE
FACING MATERIAL
NON-COMBUSTIBLE
FACING MATERIAL
IN SHADED AREAS
FIREPLACE
ARCH
OPENING
36-5/8 in.
Min.
Clearance
to Ceiling
Bottom of Fireplace to
Bottom of Non-combustible Facing Material
1 in.
18-1/8 in.
Minimum
CEILING

Heat & Glo • GEM-42B • 2096-900 Rev. H • 3/0610
A. Vent Termination Minimum Clearances
Fire Risk.
Explosion Risk.
Maintain vent clearance to combustibles
as specified.
WARNING
• Do not pack air space with insulation or
other materials.
Failure to keep insulation or other materials
away from vent pipe may cause fire.
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 4.1
Figure 4.2 Minimum Height from Roof to
Lowest Discharge Opening
Termination Locations
4
Measure horizontal clearances from this surface.
Measure vertical clearances from this surface.
Figure 4.3 Multiple Vertical Termination
Figure 4.2 specifies minimum vent heights for various
pitched roofs.
(See Figure 4.4 for specific clearances)
* 3 foot minimum in snow regions
GAS, WOOD or FUEL
OIL TERMINATION 20 IN.
(MINIMUM) TO
PERPENDICULAR
WALL (GAS ONLY)
18 IN.
A
GAS
TERMINATION
Gas Termination Wood & Fuel Oil Termination
A 6 in. 20 in.
HORIZONTAL
OVERHANG
V
ERTICAL
WALL
TERMINATION
CAP
12 X
ROOF PITCH
IS X/ 12
LOWEST
DISCHARGE
OPENING
H (MIN.) - MINIMUM HEIGHT FROM ROOF
TO LOWEST DISCHARGE OPENING
2 FT.
MIN. 20 INCHES

Heat & Glo • GEM-42B • 2096-900 Rev. H • 3/06 11
V= VENT TERMINAL X= AIR SUPPLY INLET = AREA WHERE TERMINAL IS NOT PERMITTED
Figure 4.4 Minimum Clearances for Termination
A = 12 inches ............ clearances above grade, veran-
da, porch, deck or balcony
B = 12 inches ............ clearances to window or door
that may be opened, or to per-
manentlyclosed window. (Glass)
D* = 18 inches............. vertical clearance to unventilat-
ed soffit or to ventilated soffit lo-
cated above the terminal
*30 inches............ for vinyl clad soffits and below
electrical service
F = 9 inches .............. clearance to outside corner
G = 6 inches ............... clearance to inside corner
H = 3 ft. (Canada) ...... not to be installed above a gas
meter/regulatorassembly within3
feet (90cm) horizontally from the
center-line of the regulator
I = 3 ft. (U.S.A.)
6 ft. (Canada)....... clearance to gas service regula-
tor vent outlet
J = 9 inches (U.S.A.)
12 inches (Canada)clearance to non-mechanical air
supply inlet to building or the
combustion air inlet to any other
appliance
K = 3ft. (U.S.A.)
6 ft. (Canada) ......... clearance to a mechanical
(powered) air supply inlet
L** = 7 ft.......................... clearance above paved side-
walk or a paved driveway lo-
cated on public property
M*** = 18 inches .............. clearance under veranda, porch,
deck, balcony or overhang
42 inches .............. vinyl
CAUTION: IF EXTERIOR WALLS ARE FINISHED WITH VINYL SIDING, IT IS SUGGESTED THATAVINYL PROTECTOR KIT BE INSTALLED.
** a vent shall not terminate directly above a sidewalk or paved
driveway which is located between two single family dwellings and
serves both dwellings.
*** only permitted if veranda, porch, deck or balcony is fully open on
a minimum of 2 sides beneath the floor, or meets Note 2.
NOTE 1: On private property where termination is less than 7 feet
above a sidewalk, driveway, deck, porch, veranda or balcony, use of
a listed cap shield is suggested. (See vents components page)
NOTE 2: Termination in an alcove space (spaces open only on one side
and with an overhang) are permitted with the dimensions specified for
vinyl or non-vinyl siding and soffits. 1. There must be 3 feet minimum
between termination caps. 2. All mechanical air intakes within 10 feet
of a termination cap must be a minimum of 3 feet below the termination
cap. 3. All gravity air intakes within 3 feet of a termination cap must be
a minimum of 1 foot below the termination cap.
MN
P
R
Q
(See Note 1)
(See Note 1)
(See Note 2)
Electrical
Service
V
S
VS
V
T
D*
V
NOTE 3: Local codes or regulations may require different
clearances.
NOTE 4: Termination caps may be hot. Consider their proximity
to doors or other traffic areas.
NOTE 5: Location of the vent termination must not interfere with
access to the electrical service.
WARNING: In the U.S: Vent system termination is NOT permit-
ted in screened porches. You must follow side wall, overhang
and ground clearances as stated in the instructions.
In Canada: Vent system termination is NOT permitted in screened
porches. Vent system termination is permitted in porch areas with
two or more sides open. You must follow all side walls, overhang
and ground clearances as stated in the instructions.
Heat & Glo assumes no responsibility for the improper perfor-
mance of the appliance when the venting system does not meet
these requirements.
DE
B
L
v
v
v
v
v
v
v
v
BB
AH
M
X
J or K
I
A
G
F
U.S.
(3 FT)
B
S = 6 inches ................. clearance from sides of
electrical service
T = 12 inches................ clearance above electrical
service
(See Note 5)
(See Note 5)
______________________________________________________________________
______________________________________________________________________
______________________________________________________________________
______________________________________________________________________
QMIN RMAX
1 cap 3 feet 2 x Q ACTUAL
2 caps 6 feet 1 x Q ACTUAL
3 caps 9 feet 2/3 x Q ACTUAL
4 caps 12 feet 1/2 x Q ACTUAL
QMIN = # termination caps x 3 RMAX = (2 / # termination caps) x QACTUAL
N = 6 inches................. non-vinyl sidewalls
12 inches .............. vinyl sidewalls
P = 8 ft.
Alcove Applications

Heat & Glo • GEM-42B • 2096-900 Rev. H • 3/0612
5Vent Information and Diagrams
Fire Hazard.
Explosion Risk.
Asphyxiation Risk.
Do NOT connect this gas appliance to a
chimney flue serving a separate solid-fuel or
gas burning appliance.
• Vent this appliance directly outside.
• Use separate vent system for this
appliance.
May impair safe operation of this appliance or
other appliances connected to the flue.
WARNING
CAUTION
ALL vent configuration specifications MUST be followed.
• This product is tested and listed to these
specifications.
• Appliance performance will suffer if specifications are
not followed.
B. Use of Elbows
Diagonal runs have both vertical and horizontal vent as-
pectswhencalculating the effects. Use theriseforthe ver-
tical aspect and the run for the horizontal aspect (see Fig-
ure 5.1).
Two450elbows maybeused in placeofone 900elbow.On
450runs, one foot of diagonal is equal to 8.5 inches hori-
zontal run and 8.5 inches vertical run. A length of straight
pipe is allowed between two 450elbows (see Figure 5.1).
Figure 5.1
A. Vent Table Key
The abbreviations listed in this vent table key are used in
the vent diagrams.
Symbol Description
V1First section (closest to appliance) of vertical length
V2Second section of vertical length
H1First section (closest to appliance) of horizontal length
H2Second section of horizontal length
C. Measuring Standards
Vertical and horizontal measurements listed in the vent
diagrams were made using the following standards.
1. Pipemeasurementsareshown usingtheeffectivelength
ofpipe(seeFigure5.2).
2. Measurementsaremadefromtheapplianceouterwrap,
notfromthestandoffs.
3. Horizontal terminations are measured to the outside
mounting surface (flange of termination cap) (see Fig-
ure4.1).
4. Vertical terminations are measured to bottom of termi-
nation cap.
5. Horizontalpipeinstalledlevel with no rise.
Figure 5.2 DVP Pipe Effective Length
Effective
Height/Length
DVP4 4
DVP6 6
DVP12 12
DVP24 24
DVP36 36
DVP48 48
DVP6A 3 to 6
DVP12A 3 to 12
DVP12MI 3 to 12
DVP24MI 3 to 24
Length/
Inches
Pipe
DVP PIPE
Horizontal
Vertical
8-1/2 in.
8-1/2 iN.
12 in.

Heat & Glo • GEM-42B • 2096-900 Rev. H • 3/06 13
Figure 5.3
Figure 5.4
D. Vent Diagrams
Fire Risk. Explosion Risk.
Do NOT pack insulation or other combustibles between ceiling firestops.
• ALWAYS maintain specified clearances around venting and firestop systems.
• Install wall shield and ceiling firestops as specified.
Failure to keep insulation or other material away from vent pipe may cause fire.
WARNING
1. Top Vent - Horizontal Termination
One Elbow
Two Elbows
V
1
H 1
H 2
H 1
V
1
INSTALLED
HORIZONTALLY
NOTE: Musthavean18 inch minimum
verticalventbefore attachinga 90oelbow
to the unit.
NOTE: Must have an 18 inch minimum
verticalventbeforeattachinga90oelbow
to the unit.
V1Minimum H1Maximum
1.5 ft 457 mm 2 ft 610 mm
2 ft 610 mm 5 ft 1.5 m
3 ft 914 mm 8 ft 2.4 m
4 ft 1.2 m 11 ft 3.4 m
5 ft 1.5 m 14 ft 4.3 m
6 ft 1.8 m 17 ft 5.2 m
7 ft 2.1 m 20 ft 6.1 m
8 ft 2.4 m 23 ft 7.0 m
V1= 40 ft (12.2m) Maximum
H1= 23 ft (7.0 m) Maximum
V1+ H1= 63 ft (19.2m) Maximum
V1Minimum H1+ H1Maximum
1.5 ft 457 mm 2 ft 610 mm
2 ft 610 mm 5 ft 1.5 m
3 ft 914 mm 8 ft 2.4 m
4 ft 1.2 m 11 ft 3.4 m
5 ft 1.5 m 14 ft 4.3 m
6 ft 1.8 m 17 ft 5.2 m
7 ft 2.1 m 20 ft 6.1 m
8 ft 2.4 m 23 ft 7.0 m
V1+ H1+ H2= 63 ft (19.2 m) Maximum
H1 + H2= 23 ft (7.0 m) Maximum

Heat & Glo • GEM-42B • 2096-900 Rev. H • 3/0614
Figure 5.5
1. Top Vent - Horizontal Termination - (continued)
Three Elbows
H 1
V 2
H 2
V
1
NOTE: Must have an 18 inch
minimumverticalvent beforeat-
taching a 90oelbow to the unit.
Figure 5.6
V1 Minimum H1+ H2Maximum
1.5 ft 457 mm 4 ft 1.2 m
2 ft 607 mm 7 ft 2.1 m
3 ft 914 mm 10 ft 3.0 m
4 ft 1.2 m 13 3.4 m
5 ft 1.5 m 16 4.9 m
6 ft 1.8 m 17 5.2 m
7 ft 2.1m 22 6.7 m
H1+ H2 = 22 ft (6.7 m) Max.
V1+ V2 + H1+ H2 = 62 ft (18.9 m) Max.
V1= 40 FT MAX. (12.4 M)
NOTE: Onverticalventing config-
urations install the vertical baffle
foundinthe appliancetotheleftof
the control panel. Follow flue re-
strictorinstructionsin Section7B.
Straight Up Vertical Venting
CAP
V
1
2. Top Vent - Vertical Termination

Heat & Glo • GEM-42B • 2096-900 Rev. H • 3/06 15
2. Top Vent - Vertical Termination - (continued)
Three Elbows
NOTE: Must have an 18 inch minimum
verticalventbeforeattachinga90oelbow
to the unit.
Figure 5.8
V1 + V2 Minimum H1+ H2Maximum
1.5 ft 457 mm 4 ft 1.2 m
2 ft 610 mm 7 ft 2.1 m
3 ft 914 m 10 ft 3.0 m
4 ft 1.2 m 13 ft 4.0 m
5 ft 1.5 m 16 ft 4.9 m
6 ft 1.8 m 19 ft 5.8 m
7 ft 2.1 m 22 ft 6.7 m
H1+ H2 = 22 ft (6.7 m) Max.
V1+ V2 + H1+ H2 = 62 ft (18.9 m) Max.
H 1
V
2
H 2
V
1
INSTALLED
HORIZONTALLY
NOTE: Musthavean18inchmini-
mum vertical vent before attach-
ing a 90oelbow to the unit.
V
1
H 1
V 2
Two Elbows V1+ V2 Minimum H1 Maximum
1.5 ft 457 mm 2 ft 610 mm
2 ft 610 mm 5 ft 1.5 m
3 ft 915 m 8 ft 2.4 m
4 ft 1.2 m 11 ft 3.4 m
5 ft 1.5 m 14 ft 4.3 m
6 ft 1.8 m 17 ft 5.2 m
7 ft 2.1 m 20 ft 6.1 m
8 ft 2.4 m 23 ft 7.0 m
H1= 23 ft (7.0 m) Max.
V1+ V2+ H1= 63 ft (19.2 m) Max.
Figure 5.7

Heat & Glo • GEM-42B • 2096-900 Rev. H • 3/0616
A. Pipe Clearances to Combustibles
Vent Clearances and Framing
6
Combustible Wall Penetration
Frameahole ina combustiblewallfor aninteriorwall shield
firestop, (Figure 6.2) whenever a wall is penetrated. Use
samesizeframingmaterials as thoseusedinthe wall con-
struction.Thewallshieldfirestop maintainsminimumclear-
ancesandpreventscoldair infiltration.
Non-Combustible Wall Penetration
Ifthehole beingpenetratedis surroundedbynoncombusti-
ble materials such as concrete, a hole with diameter one
inch greater than the pipe is acceptable.
Fire Risk.
Explosion Risk.
Maintain vent clearance to combustibles
as specified.
WARNING
• Do not pack air space with insulation or
other materials.
Failure to keep insulation or other materials
away from vent pipe may cause fire.
B. Wall Penetration Framing
Figure 6.1 Pipe Clearances
1 in. CLEARANCE
AROUND VERTICAL
SECTIONS
3 in. TOP
CLEARANCE
1 in. SIDE AND
BOTTOM CLEARANCE
Figure 6.2 Exterior Wall Hole
A* B
33-3/4 in. 65 in.
* Heat-Out framing is 12 inches wide by 10 inches tall, oppo-
site of vent framing. Center of Heat-Out framing is 1-1/16
inch LOWER than the center of the Heat-Out pipe.
Figure 6.2 Horizontal Venting Clearances to
Combustible Materials
NOTE: Slope
not required.
Shows center of 10” x 12” vent framing holes for top and
rearventing.Thecenterof the holeisone (1) inch(25.4mm)
above the center of the horizontal vent pipe.
WALL
HEAT
SHIELD HEAT
SHIELD
3 in. TOP
CLEARANCE
WALL
SHIELD
FIRESTOP
1 in. CLEARANCE
BOTTOM & SIDES
B
A*
HEAT-OUT
10 in.
12 in.

Heat & Glo • GEM-42B • 2096-900 Rev. H • 3/06 17
C. Vertical Penetration Framing
Installing the Ceiling Firestop
• Framean opening10 inchesby10 inch-
es whenever the vent system pene-
trates a ceiling/floor (see Figure 6.3).
• Frametheareawiththesamesizedlum-
ber as used in ceiling/floor joist.
• Wheninstallingatopventverticaltermi-
nation appliance the hole should be di-
rectly above the appliance, unless the
flueisoffset.
• Donotpack insulation aroundthevent.
Insulation must be kept away from the
pipe.
Figure 6.3
ATTIC
ABOVE
A
B
WARNING
Fire Hazard
Keep loose materials or
blown insulation from touch-
ing the vent pipe.
InstallingAttic Shield
Note: An additional ceiling firestop is not
required if attic shield is used.
• Frame opening for attic shield.
• Attic shield may be installed above or
belowceiling(see Figure 6.4).
• Secure with three fasteners on each
side.
• Fold tabs at top of attic shield in toward
vent pipe. Tabs must keep vent pipe
centered within shield.
• Field construct additional shield height
if insulation is deeper than height of at-
tic shield.
Figure 6.4 Installing the Attic Shield
•Nationalbuilding codesrecommend us-
ing attic shield to keep loose materials/
blown insulation from contacting vent.
•Hearth & Home Technologies requires
the use of an attic shield.
A B
10 in. 10 in.
DVP
PIPE
3 FASTENERS
PER SIDE
BEND TABS IN
AROUND PIPE
ATTIC SHIELD INSTALLED
BELOW CEILIN
G
ATTIC SHIELD INSTALLED
ABOVE CEILING

Heat & Glo • GEM-42B • 2096-900 Rev. H • 3/0618
Appliance Preparation
7
Í
A. Removing Non-combustible Facing
Material Assembly
The non-combustible assembly is located on the back of
appliance(seeFigure7.1).
Figure 7.1 Non-Combustible Facing Material Assembly
• Holdnon-combustiblepiecesinplace.
• Removeandsave twoscrewsfromboth upperbrackets
(seeFigure7.1).
• Removenon-combustiblepieces.
• Remove andsave threescrewsfrom lowerbracket (see
Figure7.1).
• Remove 5 screws fromuppershelf (seeFigure7.2).
• Bend sheetmetal brace away from unit (see Figure
7.2) until tabs on shelf are released from standoffs.
• Remove 3 screws at bottom of sheetmetal brace
andremovebrace from unit.
• Discard brackets, sheetmetal brace and shelf.
• Replace screws in holes where these pieces were at-
tachedtoappliance.
Handle with care.
•Non-combustible material may be damaged if dropped.
CAUTION
Figure 7.2 Sheetmetal Brace and Shelf (rear of appliance viewed from appliance front).
Remove screws
from upper
brackets.
Lower
Bracket
Î
A
A
AA
A
D
B
DD
Standoff
Standoff
Shelf
Sheetmetal
Brace
CC
A
B
C
D

Heat & Glo • GEM-42B • 2096-900 Rev. H • 3/06 19
B. Securing and Leveling the Appliance
Thediagram shows (Figure 7.3) the location of the nailing
tabswhich areprovided tosecure theappliance tothe fram-
ing members .
Figure 7.3 Proper Positioning, Leveling and
Securing of a Appliance
WARNING
Fire Risk.
• ALWAYS maintain specified
clearances around the appliance.
• Do NOT notch into the framing around the appliance spacers.
Failure to keep insulation, framing or other material away
from the appliance may cause fire.
NAILING TABS
(BOTH SIDES)
CAUTION
Sharp Edges
• Wear protective gloves
and safety glasses
during installation.
Fire Risk.
•Prevent contact with sagging, loose
insulation.
•Do NOT install against combustible
materials such as exposed insulation,
plastic and insulation backer.
WARNING
• Place the appliance into position.
• Level the appliance from side to side and front to back.
• Shim the appliance, as necessary. It is acceptable to
use wood shims.
• Bend out nailing tabs on each side.
• Keep nailing tabs flush with the framing.
• Securetheappliancetotheframingbyusingnailsorscrews
through the nailing tabs.
Î
C. Installing Non-combustible Facing
Material
WARNING
Figure 7.4 Attaching Non-combustible Facing Material
Fire Risk.
• Follow these instructions exactly.
• Facing materials must be installed properly
to prevent fire.
• No materials may be substituted without
authorization by Hearth & Home
Technologies.
• Center and attach top board to the framing members
(seeFigure7.4).
• Use fasteners from fastener packet (in manual bag) in
shadedareas(Figure7.4).
• Useregularsheetrock screwsinnon-shadedareas (see
Figure7.4).
Í
Apply fasteners from
fastener packet in
shaded areas.

Heat & Glo • GEM-42B • 2096-900 Rev. H • 3/0620
FLUE
RESTRICTOR
D. Installing Flue Restrictors
Locate the flue restrictors inside the unit to the left of the
control panel. Use the following table to determine which
restrictors to use for the vent run.
Vent Run Vertical 15 ft. - 30 ft. 30 ft. - 40 ft.
GEM-42B NG 1-3/4 in. 1-1/2 in.
LP 2 in. 1-3/4 in.
Figure 7.6
Insert one restrictor into either the left or right of the 3 inch
exhaustcollar(seeFigure 7.6).
FLUE
RESTRICTOR
Î
• Attachtheleftand right sidepiecestothe framing mem-
bers.(SeeFigure7.4).
• Use a wet or dry towel or soft brush to remove dust or
dirtfromfacingmaterial.
• Apply a non-combustible adhesive to attach tile, stone
or other non-combustible finishing materials per
manufacturer’sinstructions.
Figure 7.5 Complete Installation of Non-combustible
Facing Material
1 in.
50 in.
52 in.
NON-COMBUSTIBLE
FACING MATERIAL
E. Adjusting Pilot Shield
Note: When venting this unit with high vertical (10
feet or more) with very little horizontal the pilot shield
will need to be in the closed position (see Figure 7.7).
Figure 7.7
PILOT SHIELD SHOULD BE
CLOSED AND TOUCHING
THE PILOT BRACKET
(MORE THAN 10 FEET VERTICAL)
PILOT SHIELD
PILOT
BRACKET
Figure 7.8
Note: When venting this unit with long horizontal
runsand/ormultiple elbows,the pilot shield will need
to be inthe opened position (see Figure 7.8).
PILOT SHIELD
BEND PILOT SHIELD TO
ALLOW FOR A 3/8 INCH AIR GAP
(3 FEET HORIZONTAL, OR
TWO OR MORE ELBOWS)