Heat & Glo Wood Burning Fireplace HST-42D User manual

1
Owner’s Manual
Installation and Operation
Models:
HST-42D
Wood Burning Fireplace
DO NOT DISCARD THIS MANUAL
NOTICE
• Important operating
and maintenance
instructions included.
• Leave this manual with
party responsible for
use and operation.
• Read, understand
and follow these
instructions for safe
installation and
operation.
DO NOT
DISCARD
Installation and service of this fireplace
should be performed by qualified personnel.
Hearth & Home Technologies suggests NFI
certified or factory-trained professionals, or
technicians supervised by an
NFI certified professional.
Fire Risk
• For use with solid wood fuel or decorative
gas appliance only.
• DO NOT install unvented gas logs.
WARNING
If the information in these instruc-
tions is not followed exactly, a
fire may result causing property
damage, personal injury, or death.
• Do not store or use gasoline or other flam-
mable vapors and liquids in the vicinity of
this or any other appliance.
• Do not overfire. Overfiring will void your
warranty.
• Comply with all minimum clearances to
combustibles as specified. Failure to
comply may cause house fire.
WARNING WARNING
Hot screen/mesh and glass doors will cause burns.
• DO NOT touch screen/mesh or glass doors until
cooled
• NEVER allow children to touch screen/mesh or glass
doors
• 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.
HOT SURFACES!
Screen/mesh, glass doors
and other surfaces are hot
during operation AND cool
down.
Heat & Glo • HST-42D • 27177 • Rev AB • 11/08

2
Read this manual before installing or operating this fireplace.
Please retain this owner’s manual for future reference.
Homeowner Reference Information
Model Name: Date purchased/installed:
Serial Number: Location on fireplace:
Dealership purchased from: Dealer phone:
Notes:
We recommend that you record the following pertinent
information about your fireplace:
Listing Label Information/Location
The model information regarding your specific fireplace can be found on the rating plate located on the smoke shield of
the fireplace.
Congratulations!
Grate Fireplace
Model
Serial
Number
Note: An arrow ( ) found in the text signifies change in content.
Î
Heat & Glo • HST-42D • 27177 • Rev AB • 11/08
Congratulations on selecting a Heat & Glo wood burning
fireplace. The Heatilator fireplace you have selected is
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 refer-
ence. We suggest 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 wood burning fireplace will give you
years of durable use and trouble-free enjoyment. Wel-
come to the Heat & Glo family of fireplace products!
FIREPLACE NO.
MODEL NO.
MODEL NO.
MFG. DATE
WARNING: RISK OF
FIRE DAMAGE. REPLACE
GRATE WITH HEARTH & HOME
TECHNOLOGIES INC.
FIRECHAMBER INTENDED FOR USE WITH HEARTH & HOME TECHNOLOGIES INC. LISTED FIREPLACE PARTS. SEE INSTALLATION AND
OPERATING INSTRUCTIONS FOR THIS MODEL. ONLY HEARTH & HOME TECHNOLOGIES INC. GLASS DOOR KITS CAN BE INSTALLED ON THIS UNIT.
FIREPLACE ALSO FOR USE
IN MANUFACTURED HOMES
YES NO
CLEARANCE TO
COMBUSTIBLES:
CHIMNEY
2 IN. MIN.
FIREBOX
IN.
MIN.
FAN KIT
MODEL NO.
&RATED AT
115 VOLTS, 50/60 Hz., AMP.
DO NOT OVERFIRE. USE ONLY: SOLID WOOD FUEL OR
LISTED DECORATIVE GAS APPLIANCE. DO NOT USE A
FIREPLACE INSERT OR OTHER PRODUCTS NOT
SPECIFIED FOR USE WITH THIS PRODUCT. IF DOORS
ARE USED OPERATE FIREPLACE WITH DOORS FULLY
OPEN OR CLOSED ONLY. WHEN BURNING A
DECORATIVE GAS APPLIANCE IN THE FIREPLACE,
ADJUST DAMPER TO THE FULLY OPEN POSITION.
WARNING! THIS FIREPLACE HAS NOT BEEN TESTED WITH AN UNVENTED
GAS LOG SET. TO REDUCE THE RISK OF FIRE OR INJURY, DO NOT
INSTALL AN UNVENTED GAS LOG SET INTO FIREPLACE.
WARNING! THIS APPLIANCE IS NOT FOR USE AS COOKING EQUIPMENT.
IF INSTALLATION OR OPERATING INSTRUCTIONS ARE MISSING
CONTACT: HEARTH & HOME TECHNOLOGIES INC.,
1915 W. SAUNDERS ST., MT. PLEASANT, IA 52641.

3
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: Indicates practices which may cause damage to the fireplace or to property.
!
Table of Contents
Congratulations! 2
Warranty 4
1 Listing and Code Approvals 6
A. Appliance Certification 6
B. Non-Combustible Materials 6
C. Combustible Materials 6
User Guide
2 Operating Instructions 7
A. Your Fireplace 7
B. Seasoned Wood 8
C. Starting a Fire 8
D. Grate 8
E. Firescreen 8
F. Flue Damper 8
G. Refractory 8
H. Glass Doors 9
I. Outside Air (optional) 9
J. Vented Gas Log Sets & Gas Log Lighters 9
K. Optional Components 9
L. Clear Space 9
M. Wood Fuel 10
3 Maintainance and Service 11
A. Disposal of Ashes 11
B. Chimney Inspection/Cleaning 11
C. Check Firebox Refractory 12
D. Inspect Grate 12
E. Glass Cleaning 12
4 Troubleshooting Guide 13
Installer Guide
5 Getting Started 14
A. Typical Fireplace System 14
B. Design and Installation Considerations 15
C. Draft 15
D. Negative Pressure 15
E. Locating Fireplace & Chimney 16
F. Tools and Supplies Needed 17
G. Fireplace System Requirements 17
H. Inspect Fireplace and Components 17
6 Framing & Clearances 18
A. Select Fireplace Location 18
B. Clearances 19
C. Sidewalls/Surrounds 20
D. Frame the Fireplace 20
7 Installation of Fireplace 21
A. Things to Consider 21
B. Position the Fireplace 21
C. Place Protective Metal Hearth Strips 21
D. Level Fireplace 21
E. Install Outside Air Kit 23
8 Chimney Assembly 24
A. Chimney Requirements 25
B. Using Offsets/Returns 26
C. Assemble Chimney Sections 27
D. Install Chimney Air Kit 27
E. Install Ceiling Firestops 28
F. Install Attic Insulation Shield 29
G. Cut out Hole in Roof 30
H. Complete Installation 30
I. Install Flashing 30
J. Chimney Termination Requirements 31
9 Chase Installations 32
A. Construct the Chase 32
B. Install Fireplace & Chimney 33
C. Install Chase Top 33
D. Install Termination Cap 34
10 Shrouds 36
A. Radiation Shield 36
B. Field Constructed Shrouds 36
11 Finishing 38
A. Non-Combustible Materials 38
B. Combustible Materials 38
C. Hearth Extension 38
D. Finishing Material 39
E. Combustible Mantel 40
F. Sidewalls/Surrounds 41
12 Accessories 42
A. Gas Log/Lighter Provision 42
B. Wood Burning Inserts 42
13 Reference Materials 43
A. Fireplace Dimensions 43
B. Optional Components 43
B. Chimney Components 44
D. Service Parts 47
E. Contact Information 48
Heat & Glo • HST-42D • 27177 • Rev AB • 11/08

4
Warranty
Hearth & Home Technologies LIMITED WARRANTY
Hearth & Home Technologies (“HHT”) and its respective brands extends the following warranty for HHT gas, wood,
pellet and electric appliances purchased from an authorized HHT dealer and installed in the United States of America or
Canada. Warranty starts with date of purchase by the original owner (End User) except as noted for replacement parts.
Warranty Period HHT Manufactured Appliances and Venting
Components Covered
Parts Labor Gas Wood Pellet EPA
Wood Electric Venting
1Year XXXXXX
All Parts and Material Except as
covered by Conditions, Exclu-
sion, and Limitations listed
2years
XX Igniters, Electronic Compo-
nents, and Glass
srewolBXXXX
slenaPyrotcarfeRdedloMX
stoperiFXsraey3
faB&sgnitsaCXXsraey3sraey5 ?es
7years 3years X X X
Firebox, HHT Chimney, Termi-
nation & Heat
Exchanger
10
years yrotcarfeR&sgoL,srenruBXraey1
Limited
Lifetime regnahcxEtaeH&xoberiFXraey1
90Days XXXXXX AllReplacementParts
See Conditions, Exclusions, and limitations. 9-01-08
CONDITIONS, EXCLUSIONS & LIMITATION OF LIABILITY
This warranty applies to the original owner and is transferable up to two years from date of purchase to the new
homeowner, provided the purchase was made through an authorized dealer or distributor of HHT, and the appliance
remains in its original place of installation.
The maximum amount recoverable under this warranty is limited to the purchase price of the product.
In no event shall HHT be liable for any incidental or consequential damages caused by defects in the product.
Adjustments, regular maintenance, cleaning and temporary repairs, or the failure to duplicate the problem in the home
is not covered under this warranty.
4021-645A 09-01-08 Page 1 of 2
Heat & Glo • HST-42D • 27177 • Rev AB • 11/08

5
This limited warranty does not extend to or include surface ?nish on the appliance or terminations, door gasketing, glass
gasketing, glass discoloration, ?rebrick, pellet logs, kaowool or other ceramic insulating materials. Rust and/or corrosion
on any of the metal surfaces, cast iron components, baf?es, ?repots, doors, or ?rebox area are not covered by this
warranty.
Noise resulting from minor expansion, contraction, or movement of certain parts is normal and complaints related to
this noise are not covered by this warranty.
HHT’s obligation under this warranty does not extend to damages resulting from: (1) installation, operation or
maintenance of the appliance not in accordance with the installation instructions; operating instructions and the
listing agent identi?cation 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
or handling devices such as exhaust fans or forced air furnaces or other such causes; (5) use of fuels other than
those speci?ed 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) modi?cation of the appliance not
expressly authorized and approved by HHT in writing.
This warranty does not apply to non-HHT venting components, hearth components or other accessories used in
conjunction with the installation of this product.
This warranty is void if the appliance has been over-?red or operated in atmospheres contaminated by chlorine,
?uorine, or other damaging chemicals the appliance is subject to prolonged periods of dampness or condensation, or
there is any damage to the appliance or other components due to water or weather damage which is the result of, but
not limited to, improper chimney or venting installation.
HHT’s liability under this 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) at HHT’s discretion. Shipping costs are not covered under this warranty.
Some states do not allow exclusions or limitation of incidental or consequential damages, so those limitations may not
apply to you. This warranty gives you speci?c rights; you may also have other rights, which vary from state to state.
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.
This Limited Warranty is effective on all HHT appliances sold after September 01, 2008 and supersedes any and all
warranties currently in existence.
If warranty service is needed, you should contact your installing dealer. If the installing dealer is unable to provide
necessary parts or components, contact the nearest authorized HHT dealer or supplier.
4021-645A 09-01-08 Page 2 of 2
Heat & Glo • HST-42D • 27177 • Rev AB • 11/08

6
1
1 Listing and Code Approvals
NOTICE: This fireplace is tested and approved as a
decorative fireplace. It should not be factored as a primary
heat source in residential heating calculations.
WARNING! Risk of Fire! Hearth & Home Technologies
disclaims any responsibility for, and the warranty and
agency listing will be voided by the following actions.
DO NOT:
• install or operate damaged fireplace
• modify fireplace
• install other than as instructed by Hearth & Home
Technologies
• operate the fireplace without fully assembling all
components
• overfire
• install an unvented gas log set
• install any component not approved by Hearth &
Home Technologies
• install parts or components not Listed or approved
Improper installation, adjustment, alteration, service or
maintenance can cause injury or property damage. For
assistance or additional information, consult a qualified
installer, service agency or your dealer.
B. Non-Combustible Materials
• Materials which will not ignite and burn, composed of
any combination of the following:
- Steel - Iron
- Brick - Tile
- Concrete - Slate
- Glass - Plasters
• Materials reported as passing ASTM E 136, Standard
Test Method for Behavior of Metals, in a Vertical Tube
Furnace at 750° C
C. Combustible Materials
• Materials made of or surfaced with any of the following
materials:
- Wood - Compressed paper
- Plant fibers - Plastic
• Any material that can ignite and burn; flame proofed or
not, plastered or un-plastered
Heat & Glo • HST-42D • 27177 • Rev AB • 11/08
A. Appliance Certification
This fireplace may be installed in sleeping rooms EX-
CEPT in manufactured homes. If installed with a gas log
set, provisions for the National Fuel Gas Code must be
met.
This fireplace has been tested and listed for use with the
optional components specified in this manual. These op-
tional components may be purchased separately and in-
stalled at a later date. Installation of an outside air kit will
require significant reconstruction and is best if installed at
the time of fireplace installation.
Heat & Glo is a registered trademark of Hearth & Home
Technologies Inc.
This fireplace system has been tested and listed in accor-
dance with UL 127 and ULC-S610 standards by Under-
writers Laboratories Inc. for installation and operation in
the United States and Canada.

7
2
2 Operating Instructions
WARNING! DO NOT operate fireplace before reading and understanding operating instructions. Failure to operate fireplace
according to operating instructions could cause fire or injury.
User Guide
WARNING
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.
HOT SURFACES!
Glass and other surfaces are hot during operation AND cool down.
Figure 2.1 General Operating Parts
A. Your Fireplace
If you expect that children may come into contact with this fireplace, we recommend a barrier such as a decorative
screen. See your dealer for suggestions.
Heat & Glo • HST-42D • 27177 • Rev AB • 11/08

8
• The first three or four fires should be of moderate size to
allow the oils and binders to be burned from the fireplace
and the refractory and paint to cure. You may notice
an industrial odor the first few fires. This is considered
normal.
• Use well-seasoned wood.
• Open the flue damper to a fully open position.
• Place crumpled or twisted paper under the fireplace
grate.
• Loosely arrange kindling or small pieces of wood to form
a ‘tent’ on the fireplace grate.
• Pre-warm the flue to establish a draft to help reduce
smoke spillage during start-up. Hold a rolled up piece
of burning newspaper under the flue damper for a few
moments.
• Light the crumpled paper to ignite the kindling.
• Add small pieces of wood until a hot bed of embers has
been established.
• Add a minimum of three average size pieces of split
firewood, placed to allow combustion air and flames
between them.
C. Starting a Fire
NOTICE: You must establish a good draft to prevent smoke
spillage into the room.
WARNING! Risk of Fire! Keep combustible materials,
gasoline and other flammable vapors and liquids clear of
the fireplace.
DO NOT:
• store flammable materials close to the fireplace
• use gasoline, lantern fuel, kerosene, charcoal lighter
fluid or similar liquids to start or “freshen up” a fire in this
fireplace.
Keep all flammable liquids well away from the fireplace while
it is in use. Combustible materials may ignite.
B. Seasoned Wood
Properly seasoned wood is important for successful
operation of your fireplace. Most woodburning fireplace
problems are caused by burning wet, unseasoned wood.
Seasoned firewood is wood that is cut to size, split and air
dried to a moisture content of around 20%.
Imagine a wooden bucket that weighs about eight
pounds. Fill it with a gallon of water, put it in the fireplace
and try to burn it. This sounds ridiculous but that is exactly
what you are doing if you burn unseasoned wood.
A tree cut down a year ago and not split is likely to have
almost as high a moisture content now as it did when it
was cut.
Please refer to Section 2.M. for more detail.
CAUTION! Odors and vapors released during initial
operation may be irritating to sensitive individuals.
Open windows for air circulation.
D. Grate
This fireplace is designed to be used with the grate sup-
plied with this unit or one approved by HHT. The grate will
break down over time and will need occasional replace-
ment.
WARNING! Risk of Fire! Use only the factory-supplied
integral grate.
• Keeps logs in place.
• Allows proper air circulation around the fire.
E. Firescreen
The firescreen is provided to control sparks. Keep it
closed when the fireplace is in use.
WARNING! Risk of Fire or Burns!
• Screen will not prevent burning materials from falling
out.
• Screen pulls or handles may be hot.
F. Flue Damper
• Refer to Figure 2.1 for location of control.
• Must be in fully open position (handle up toward the top
of the fireplace) during operation of the fireplace.
• Before lighting the fireplace, verify fully open position by
looking up from the inside of the fireplace.
WARNING! Risk of Fire and Asphyxiation! Open
damper prior to operating fireplace. A closed damper
overfires the fireplace and spills smoke and flames
into the room.
G. Refractory
• The refractory is supplied to contain heat and provide
an attractive interior.
• It will break down over time and will need occasional
replacement. Small hairline cracks and discoloration are
normal and do not affect its safety.
• (See refractory maintenance Section 3.C.)
WARNING! Risk of Fire! DO NOT burn fireplace with-
out refractory. Use only refractory supplied by Hearth &
Home Technologies, Inc.
Heat & Glo • HST-42D • 27177 • Rev AB • 11/08

9
INCORRECT CORRECT
INCORRECT CORRECT
Figure 2.2 Operating Positions of Bi-fold Doors
WARNING! Risk of Fire and Smoke! Fireplaces
equipped with doors should be operated only with
doors fully open or doors fully closed. If doors are left
partly open, gas and flame may be drawn out of the
fireplace opening.
I. Outside Air (optional)
The outside air kit supplies some combustion air for your
fireplace. It may help reduce the effects of negative air
pressure. (See Section 5.D.)
• 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.
WARNING! Risk of Fire! Install ONLY doors ap-
proved by Hearth & Home Technologies, Inc.
• Glass doors are optional.
• Refer to Figure 2.2 for how to properly use them.
H. Glass Doors
48 in. (1219 mm)
Clear Space
Front of Fireplace
12 in. (305 mm)
Clear Space
Sides of Fireplace
(from the FP
opening)
Figure 2.3 Clear Space
J. Vented Gas Log Sets & Gas Log Lighters
• Optional
• Vented gas logs or gas log lighters can be installed in
this fireplace. Follow the instructions provided with the
accessory for operation.
K. Optional Components
• Other options may be available
• Consult your dealer/distributor
L. Clear Space
• Do not place combustible objects within areas indicated
in Figure 2.3.
WARNING! DO NOT place combustible objects in front
of the fireplace. High temperatures may ignite clothing,
furniture or draperies.
• Mantel - avoid placing candles and other heat-sensitive
objects on mantel or hearth. Heat may damage these
objects.
WARNING! Risk of Fire or Asphyxiation!
• DO NOT install unvented gas logs.
• Damper must be locked open.
• Gas flame may generate fumes.
WARNING! Risk of Fire! DO NOT install and or use
any component not approved by Hearth & Home Tech-
nologies Inc.
Heat & Glo • HST-42D • 27177 • Rev AB • 11/08

10
M. Wood Fuel
Hardwood vs Softwood
Your fireplace performance depends on the quality of the
firewood you use.
• Seasoned wood contains about 8,000 BTUs per pound
.
• Hard woods are more dense than soft woods.
• Hard woods contain 60% more BTUs than soft woods.
• Hard woods require more time to season, burn slower
and are harder to ignite.
• Soft woods require less time to dry, burn faster and are
easier to ignite.
• Start the fire with soft wood to bring the fireplace up to
operating temperature and to establish draft.
• Add hard wood for slow, even heat and longer burn
time.
The majority of the problems fireplace owners experience
are caused by trying to burn wet, unseasoned wood.
• Wet, unseasoned wood requires energy to evaporate
the water instead of heating your home, and
• Evaporating moisture cools your chimney, accelerating
formation of creosote.
WARNING! Risk of Fire!
• DO NOT burn wet or green wood.
• Wet, unseasoned wood can cause accumulation of
creosote.
Moisture
Soft woods Hard woods
• Douglas Fir • Oak
• Pine • Maple
• Spruce • Apple
• Cedar • Birch
• Poplar
• Aspen
• Alder
Storing Wood
Steps to ensure properly seasoned wood:
• Stack wood to allow air to circulate freely around and
through woodpile.
• Elevate wood pile off ground to allow air circulation
underneath.
• Smaller pieces of wood dry faster. Any piece over 6 in.
(152 mm) in diameter should be split.
• Wood (whole or split) should be stacked so both ends
of each peice are exposed to air. More drying occurs
through the cut ends than the sides.
• Store wood under cover to prevent water absorbtion
from rain or snow. Avoid covering the sides and ends
completely.
Seasoned Wood
• Cut logs to size
• Split to 6 in. (152 mm) or less
• Air dry to a moisture content of around 20%
- Soft wood - about nine months
- Hard wood - about eighteen months
NOTICE: Seasoning time may vary depending on drying
conditions.
WARNING! Fire Risk! DO NOT store wood:
• In front of the fireplace.
• In space required for loading or ash removal.
Processed Solid Fuel Firelogs
Manufactured firelogs may be used with this fireplace.
Hearth & Home Technologies Inc. recommends the use of
UL Classified processed fuel firelogs. Follow the manufac-
turer’s lighting and safety instructions.
Using firelogs may require more frequent chimney inspec-
tion and cleaning.
Do not poke or stir the logs while they are burning. Use
only firelogs that have been evaluated for the application
in manufactured fireplaces and refer to firelog warnings
and caution markings on packaging prior to use.
Heat & Glo • HST-42D • 27177 • Rev AB • 11/08

11
3
3 Maintainance and Service
Figure 3.1 Chimney & Termination Cap Cleaning
A. Disposal of Ashes
Frequency: When they reach bottom of grate
By: Homeowner
WARNING! Risk of Fire! Ashes could contain hot em-
bers.
• Place ashes in a metal container with a tight-fitting lid.
• The closed container should be placed on a
noncombustible floor or on the ground, well away from
all combustible materials, pending final disposal.
• If the ashes are disposed of by burial in soil or otherwise
locally dispersed, they should be retained in the closed
container until all cinders have thoroughly cooled.
B. Chimney Inspection/Cleaning
Frequency: At least twice a year during heating season
or as recommended by a certified chimney sweep
By: Certified chimney sweep
WARNING! Risk of Fire! Ignited creosote is extremely
HOT. Prevent creosote buildup.
Refer to Figure 3.1 to remove/reinstall termination caps.
Creosote - Formation and Need for Removal
When wood is burned slowly, it produces tar and other
organic vapors, which combine with expelled moisture to
form creosote. The creosote vapors condense in the rela-
tively cool chimney flue of a slow-burning fire. As a result,
creosote residue accumulates on the flue lining. When
ignited this creosote makes an extremely hot fire.
WARNING! Risk of Fire! A chimney fire can permanently
damage your chimney system and nearby structures.
In the event of a chimney fire, Hearth & Home Technolo-
gies Inc. recommends
• replacement of the chimney, and
• inspection of the adjacent structure to the provisions of
NFPA Level III inspection criteria.
The chimney shall be inspected at least twice a year
during the heating season to determine when a creosote
buildup has occurred.
When creosote has accumulated it shall be removed to
reduce the risk of a chimney fire.
Heat & Glo • HST-42D • 27177 • Rev AB • 11/08
Chimney
Remove 4 screws
and lift top pan off.
Cap
Slip
Section
ST375
Square
Termination Cap
Cap
Remove screws,
lift top cover.
Top Cover
TR344/TR342
Round
Termination Cap
Chase
Cap
1. Remove the 4 screws.
2. Remove the screen.
3. Remove the baffle.
TS345/TS345P
Square
Termination Caps
TCT375
Terra Cotta
Termination Cap
Remove 2 screws from
the front and back and
lift the top off.

12
C. Check Firebox Refractory
Frequency: After each ash removal
By: Homeowner
D. Inspect Grate
Frequency: After each ash removal
By: Homeowner
Inspect grate for:
• Warping or sagging 1-1/2 in. (38 mm) or more
• Broken welds
• Burn-through of grate bars
For safe operation, replace only with an approved grate
from Hearth & Homes Technologies Inc.
WARNING! Risk of Fire! Inspect fireplace refractory.
Crumbling, deteriorated refractory can allow overheating
of surrounding materials.
Expansion and contraction will cause minor cracking of
the refractory. This is normal. The refractory will require
periodic replacement depending on use.
The panels should be replaced if
• Cracks exceed ¼ inch (6 mm) in width,
• Metal is exposed behind the refractory,
• Large pieces of refractory fall out.
E. Glass Cleaning
Frequency: As desired
By: Homeowner
Clean glass with a non-abrasive commercially available
cleaner or ashes:
• Light deposits
- Use household glass cleaner
• Heavy deposits
- Use wood ash on damp cloth or,
- Use commercial fireplace glass cleaner (consult with
your dealer)
CAUTION! Handle glass assembly with care. Glass is
breakable.
• Avoid striking, scratching or slamming glass
• Avoid abrasive cleaners
• DO NOT clean glass while it is hot
Heat & Glo • HST-42D • 27177 • Rev AB • 11/08

13
4
4 Troubleshooting Guide
Start Fire Problems Possible Cause Solution
Can’t get fire started
Excessive smoke or spillage
Burns too slowly
Smolders, sizzles
Not enough kindling/paper or no
kindling/paper
Use dry kindling, more paper. Arrange kindling &
wood for air movement.
Damper closed/not fully open Open damper.
Not enough air for fire to ignite Check for restricted cap/shroud.
Open air kit (if installed).
Check for flue blockage.
Pre-warm flue before starting fire (refer to starting
fire section).
Check for adequate vent height (refer to chimney
assembly section).
Open window below the fireplace towards the
wind.
Wood condition is too wet, too
large
Use dry, seasoned wood (refer to wood fuel
section).
Bed of coals not established
before adding wood
Start with paper & kindling to establish bed of
coals (refer to starting fire section).
Flue blockage such as birds’
nests or leaves in termination
cap
Have chimney inspected for creosote and cleaned
by a certified chimney sweep.
Down draft or negative pressure
Competition with exhaust
devices
Do not use exhaust fans during start-up (refer to
negative pressure section).
Open window below the fireplace towards the
wind.
Fire burns too fast Extremely dry or soft wood Mix in hardwood.
Mix in less seasoned wood after fire is established
(refer to wood fuel section).
No glass doors Add glass doors to slow down air flow.
Overdrafting Check for correct vent height; too much vertical
height creates overdrafting.
Check location of vent termination (refer to
chimney assembly section).
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5
5 Getting Started
A. Typical Fireplace System
Installer Guide
Heat & Glo • HST-42D • 27177 • Rev AB • 11/08
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Non-combustible
roof flashing maintains
minimum clearance
around chimney
Additional lateral
support for chimney
above roof (or enclosed
in chase) if needed
(Section 8)
Ceiling firestop
on floor of attic
(Section 8)
Support straps
on rafter support
chimney (not shown)
Termination cap
(Section 8 & 9)
Chimney penetrates roof
preferably without affecting
roof rafters (Section 9)
Offset & Return (with hanger straps)
(Section 8)
Framing headed off
in ceiling joists
(Section 8)
Enclosed space above
and around fireplace
(Section 6)
Mantel and surround
(Section 11)
Decorative facing
and trim
(Section 11)
Hearth extension
(Section 11)
Factory-built fireplace
Protective metal
hearth strip(s)
(Section 7)
Outside
combustion air
(Section 7)
Combustible framing/header
on top of V-shaped standoffs
(Section 6)
Chimney system
(Section 8)
Attic insulation shield (not shown)
must be used here to keep
insulation away from chimney
if attic is insulated (Section 8)
Storm Collar
(Section 8)
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.
Chimney Air Kit
(Section 8)
Required in
Canada. Outlet
must be no
less than 6 ft.
(1.83m) off
ground level.
Figure 5.1 Typical Fireplace System

15
Negative pressure results from the imbalance of air avail-
able for the fireplace to operate properly. It can be stron-
gest in lower levels of the house.
Causes include:
• Exhaust fans (kitchen, bath, etc.)
• Range hoods
• Combustion air requirements for furnaces, water heaters
and other combustion appliances
• Clothes dryers
• Location of return-air vents to furnace or air
conditioning
• Imbalances of the HVAC air handling system
• Upper level air leaks such as:
- Recessed lighting
- Attic hatch
- Duct leaks
To minimize the effects of negative air pressure:
• Install the outside air kit with the intake facing prevailing
winds during the heating season
• Ensure adequate outdoor air for all 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
• Recessed lighting should be a “sealed can” design
• Attic hatches weather stripped or sealed
• Attic mounted duct work and air handler joints and seams
taped or sealed
• Basement installations should be avoided
WARNING! Risk of Asphyxiation! Negative pressure
can cause spillage of combustion fumes and soot. Fire
must draft properly for safe operation.
NOTICE: Hearth & Home Technologies Inc. recommends
the use of direct vent fireplaces in basements.
D. Negative PressureB. Design and Installation Considerations
Draft is the pressure difference needed to vent fireplaces
successfully. When a fireplace is drafting successfully, all
combustion byproducts are exiting the home through the
chimney.
Considerations for successful draft include:
• Preventing negative pressure
• Location of fireplace and chimney
Before installing, determine the following:
• Where the fireplace 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
NOTICE: Check building codes prior to installation.
• 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.
NOTICE: Hearth & Home Technologies assumes no
responsibility for the improper performance of the fireplace
system caused by:
• Inadequate draft due to environmental conditions
• Downdrafts
• Tight sealing construction of the structure
• Mechanical exhausting devices
• Improper location of the chimney
C. Draft
NOTICE: Junction box should be installed during initial
setup to avoid major reconstruction.
Heat & Glo • HST-42D • 27177 • Rev AB • 11/08

16
Marginal Location:
• Below peak
Location NOT recommended:
• Not the highest point of the roof
• Wind loading possible
Multi-level Roofs
Windward
Leeward
Recommended Location:
• Above peak
Recommended:
• Insulated exterior chase
in cooler climates
Recommended Location:
• Above peak
• Inside heated space
Location NOT recommended:
• Too close to tree
• Below adjacent structure
• Lower roof line
• Avoid outside wall
Marginal Location:
• Wind loading possible
Figure 5.2 Recommended Chimney Locations
E. Locating Fireplace & Chimney
Location of the fireplace and chimney will affect perfor-
mance.
• Install within the warm airspace enclosed by the building
envelope. This helps to produce more draft, especially
during lighting and die-down of the fire.
• Penetrate the highest part of the roof. This minimizes
the effects of wind loading.
• Locate termination cap away from trees, adjacent
structures, uneven roof lines and other obstructions.
• Minimize the use of chimney offsets.
• Consider the fireplace location relative to floor and ceiling
and attic joists.
• Take into consideration the termination requirements in
Section 8 and Section 9.
NOTICE: Locating the fireplace in a basement or in a location
of considerable air movement can cause intermittent smoke
spillage from fireplace. Do not locate fireplace near
• frequently open doors
• central heat outlets or returns
Heat & Glo • HST-42D • 27177 • Rev AB • 11/08

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Before beginning the installation be sure the following
tools and building supplies are available:
Reciprocating saw Framing material
Pliers Non-combustible sealant
Hammer Gloves
Phillips screwdriver Framing square
Flat blade screwdriver Electric drill and bits
Plumb line Safety glasses
Level Tape measure
1/2-3/4 in. length, #6 or #8 self-drilling screws
Misc. screws and nails
F. Tools and Supplies Needed H. Inspect Fireplace and Components
WARNING! Risk of Fire and/or Explosion! Damaged
parts could impair safe operation. DO NOT install dam-
aged, incomplete or substitute components. Keep fire-
place dry.
• Remove fireplace and components from packaging and
inspect for damage.
• Vent system components and doors are shipped in
separate packages.
• Report to your dealer any parts damaged in shipment.
• Read all the instructions before starting the
installation. Follow these instructions carefully
during the installation to ensure maximum safety
and benefit.
G. Fireplace System Requirements
This fireplace system requires:
• Hearth Refractory
• Grate Assembly
• Outside Air Hood
- Duct must be installed, but sold separately.
Heat & Glo • HST-42D • 27177 • Rev AB • 11/08

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6
6 Framing & Clearances
52 in.
(1321 mm)
36 in.
(914 mm)
16 in. (406 mm)
(hearth
extension)
48 in.
(1219 mm)
12 in. (305 mm)
min. to
perpendicular
wall.
Figure 6.1 Fireplace Locations
A. Select Fireplace Location
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B. Clearances
WARNING! Risk of Fire! You must comply with all minimum air space clearances to combustibles as specified in Fig-
ure 6.2. DO NOT pack required air spaces with insulation or other materials.
Heat & Glo • HST-42D • 27177 • Rev AB • 11/08
(insulation)
0 in. to level
of standoffs
Attic
Insulation
Shield
(ceiling)
(roof)
(attic)
(ceiling)
Ceiling Firestop
Offset/Return (secured
with hanger straps)
Storm Collar
Roof Flashing
1/2 in. (13 mm) to back &
sides of appliance
Must have 2 in. (51 mm)
minimum clearance
to header
0 in.
to floor
2 in. (51 mm) min.
Shaded areas
represent
2 in. (51 mm) min.
air space clearance
required around pipe
Combustible Object
48 in.
1219 mm
Figure 6.2 Clearances to Combustible Materials
Note: Chimney air kit is not shown, but is required in Canada.

20
40 in.
[1016 mm]
36 in.
[914 mm]
12 in.
[305 mm]
9 3/4 in.
[248 mm]
12 in.
[305 mm]
12 in.
[305 mm]
Grid represents 1 in. (25 mm) squares
FLUSH
FRONT
4 in.
[102 mm]
BRICK
FRONT
50° angle
39° angle
D. Frame the Fireplace
Figure 6.4 shows typical framing using combustible materials (2x4 lumber shown).
• Observe all required air space clearances to combustible materials as shown in Figure 6.1 & 6.2.
• Framing across the top of fireplace must be above top standoffs.
You must maintain
2 in. (51 mm) min. air space
clearance from the
chimney to the
enclosure.
23 in.
(584 mm)
Note: Fireplace
Header cannot be
positioned until after
the fireplace assembly
is in place.
41 in.
(1041 mm)
Figure 6.4 Framing the Fireplace
C. Sidewalls/Surrounds
• Adjacent combustible sidewalls must be located a minimum of 12 in. (305 mm) from the fireplace opening.
• Combustible and noncombustible mantel legs, surrounds and stub walls may be constructed within the gridded area,
Figure 6.3.
Figure 6.3 Mantel Leg or Wall Projections (Acceptable on both sides of opening)
Heat & Glo • HST-42D • 27177 • Rev AB • 11/08