HearthStone 8321 Instruction Manual

Owner’s Manual & Installation Guide
for the Stowe (8321) GAS-FIRED
DIRECT-VENT HEATER
READ THIS OWNER’S MANUAL
Operate and maintain this gas heater
according to this instruction manual.
Read This Manual In Its Entirety.
WARNING: If the information in these
instructions is not followed exactly, a fire or
explosion may result causing property damage,
personal injury, or loss of life.
Do not store or use gasoline or other flammable
vapors and liquids near this or any other gas
appliance.
WHAT TO DO IF YOU SMELL GAS:
•Do not try to light any appliance.
•Do not touch electrical switches; do not use
the phone in your building.
•Immediately call your gas supplier from a
neighbors phone. Follow your gas supplier’s
instructions.
•If you cannot reach your gas supplier, call the
fire department.
A qualified installer, service agency or gas supplier
must perform installation and service. In the
Commonwealth of Massachusetts, all installation
of gas lines and gas fitting shall only be done by a
licensed gas fitter or licensed plumber.
AVERTISSEMENT: Assurez-vous de bien
suivre les instructions donné dans cette notice
pour réduire au minimum le risque d’incendie
ou pour éviter tout dommage matéeriel, toute
blessure ou la mort.
Ne pas entresposer ni utiliser d’essence ni d’autre
vaperurs ou liquides inflammables dans le
voisinage de cet apprareil ou de tout autre appareil.
QUE FAIRE SI VOUS SENTEZ UNE ODEUR
DE GAZ:
•Ne pas tenter d’allumer d’appareil.
•Ne touchez à aucun interrupteur.
Ne pas vous
servir des téléphones se trouvant dans le
batiment où vous vous trouvez.
•
Appelez immédiatement votre fournisseur de
gaz depuis un voisin. Suivez les instructions
du fournisseur.
•
Si vous ne pouvez rejoindre le fournisseur de
gaz, appelez le service dos incendies.
L’installation et service doit être
exécuté par un
qualifié installer, agence de service ou le
fournisseur de gaz.
6400-40422 11-24-04
HearthStone Quality Home Heating Products, Inc.
317 Stafford Avenue,
Morrisville, Vermont 05661-8695
E-Mail: [email protected]

HearthStone Quality Home Heating Products Inc Stowe Model #8321
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INFORMATION SHEET
Use this page to record all relevant information concerning the purchase, installation, and maintenance
of your STOWE Gas-Fired Direct-Vent heater. This information will facilitate servicing, purchase of
replacement parts, and warranty claims (if necessary). Keep your original receipt in a safe place as
proof of purchase.
Serial Number:
Fuel type (check one)Natural Gas Liquid Propane
Sold by:
Phone: Date of Purchase:
Installed by:
Phone: Date of Installation:
Gas Supplier:
Phone:
Read this Owner’s Manual before installing or operating the STOWE heater. Retain this manual for future
reference.
SERVICE RECORD
Date Who Performed Work Work Performed Notes:
WHAT WHEN WHAT WHEN
Firebox Cleaning............. annually Door Gasket.................... Replacement as needed
Glass Cleaning................ as needed

HearthStone Quality Home Heating Products Inc Stowe Model #8321
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INTRODUCTION
Congratulations on your purchase of a
Stowe Gas-Fired Direct-Vent heater. The
Stowe, by HearthStone, incorporates the
latest in balanced vent gas technology,
which will provide you with clean, efficient
heat for years to come. The cast iron gives
the Stowe a pleasing look that is maintained
with minimum care.
The Stowe will provide you with years of
practical and convenient service. However,
as with any gas appliance, the unit must be
properly installed and maintained by
qualified service personnel to ensure safe
and trouble-free operation.
Your Stowe is equipped with a standing
pilot which:
1. Generates a milli-volt signal that
powers (opens) the millivolt gas
valve.
2. Lights the main burner when the
thermostat calls for heat.
This unit is equipped with an On/Off/T’stat
switch and a variable output control. The
variable output control is located on the gas
control valve. It allows you to vary the heat
output, along with the flame height to suit
personal taste. Heat output can be reduced
{set to “LOW”} during the Fall and Spring,
when the need for heat is reduced and
increased {set to “HIGH” during Winter
months, when the need for heat is the
greatest.
A wall-mounted thermostat is provided by
HearthStone. Regardless of how you set the
variable output control, when the optional
thermostat has been installed and the
On/Off/T’stat switch is set to “T’stat”, the
wall-mounted thermostat will control the
on/off cycling of the unit. At any time, you
can override the thermostat with the
On/Off/T’stat switch by setting it to “ON”
or “OFF”.
The Unit can also be equipped with an
optional blower-fan kit which operates
independently of the thermostat. The fan
switch allows you to turn the fan on or off
and control the speed of the fan to suit your
needs. The fan will automatically turn on
when the stove is hot and cycle off when the
unit is no longer hot.
Also available are two different optional
remote controls. Both of the remote controls
are capable of turning the unit on and off.
One of the optional remotes also allows you
to control the temperature of the room from
anywhere in the vicinity of the unit. If “ON”
& “OFF” are the only controls required; Kit
# 90-56912 can be used. If you would like to
control the temperature via the remote
control, use Kit # 90-56914.
READ THIS OWNER’S MANUAL
Operate, and maintain, this gas heater
according to the instructions in this manual.
For your safety, and years of trouble free
operation, read this manual in its entirety.
THIS HEATER MUST BE
INSTALLED AND MAINTAINED BY
QUALIFIED SERVICE PERSONNEL
Verify the gas connections and venting
systems with requirements of local, regional
or national installation codes. Qualified
service personnel must inspect the gas heater
before use, and at least annually.

HearthStone Quality Home Heating Products Inc Stowe Model #8321
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TABLE OF CONTENTS
INTRODUCTION...........................................3
SAFETY INFORMATION...............................4
SPECIFICATIONS:.................................7
OWNER’S INFORMATION............................8
INSTALLER’S INFORMATION ......................8
ITEMS REQUIRED FOR INSTALLATION.......9
UNPACKING AND INSPECTION....................9
VENTING INFORMATION...........................13
ELECTRICAL CONNECTIONS ....................21
GAS SUPPLY & CONNECTIONS.................23
LOG PLACEMENT .....................................24
LIGHTING THE UNIT FOR .........................26
THE FIRST TIME........................................26
INITIAL ADJUSTMENTS.............................27
ROUTINE MAINTENANCE AND CARE.......31
PARTS LISTS .............................................33
LIMITED WARRANTIES ................... 38
SAFETY INFORMATION
Your Stowe is a very attractive and extremely
efficient, utilizing today’s best technologies. By
following a few simple safety precautions and
by performing minimal maintenance, the unit
will remain appealing while providing years of
quality performance.
The installation must conform to local codes or,
in the absences of local codes, the current
National Fuel Gas Code, ANSI Z223.1 (NFPA
54) or CAN/CGA B149 Installation Code.
(Installer l’appareil selon les codes ou
réglements locaux, ou, en l’absence de tells
réglements, selon les Codes d’installation
CAN/CGA B149.)
Do not use this appliance if any gas control part
was under water. Immediately call a qualified
service technician to inspect the heater and to
replace any part of the control system and gas
control that was submerged. (Ne pas se servir de
cet appareil s’il a été plongé dans l’eau,
complétement ou en partie. Appeler un
technicien qualifié pour inspector l’appareil et
remplacer toute partie du systéme de contrôle et
toute commande qui ont été plunges dans l’lau.)
During the first few hours of operation, the
appliance may produce a slight smoke and/or
odor. This is normal during the first several
burns. During the initial burn, open a window(s)
to assist in the removal of the smoke/odor. If the
logs appear to smoke, turn the heater off and call
a qualified service technician.
The appliance and its individual shutoff valve
must be disconnected from the gas supply piping
system during any pressure testing of that supply
system at test pressures in excess of ½ psig.
(3.5k Pa).
FIRE HAZARD
Do not store or use gasoline or other
flammable vapors or liquids in the vicinity
of this appliance. The Stowe should be
located out of traffic and away from
furniture, draperies, clothing, and flammable
material.
SHOCK HAZARD
(When equipped with an optional blower)
This appliance is equipped with a three-prong
(grounding) plug for protection against shock
hazard, and should be plugged directly into a
properly grounded three-prong receptacle. Do
not cut, or remove, the grounding prong from
the plug.

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MUST BE VENTED TO THE
OUTSIDE
Never vent the gas heater to other rooms, or
buildings. This gas appliance must not be
connected to a chimney flue serving a
separate solid-fuel burning appliance.
SERVICE CAUTION
If you believe your Stowe is not performing
properly, in any way, immediately
discontinue operation until the unit is
inspected, and approved for use by qualified
service personnel. Prior to servicing the
unit, turn the valve control knob clockwise
to “OFF”. The unit should be cool prior to
servicing and cleaning. Any safety screen,
guard, or component removed during
servicing must be replaced before operation.
Use of any components not supplied by
HearthStone voids all warranties. Do not
substitute components.
HOT SURFACES
Certain exposed surfaces of the Stowe will
reach high temperatures during normal
operation. Clearances to combustibles must
be maintained, as specified in the
“Clearances To Combustibles” section of
this manual. Due to high temperatures, the
appliance must be located out of traffic
and away from furniture, draperies,
clothing, and flammable materials. Alert
children, and adults, to the hazards of
high surface temperatures, and that they
should stay away to avoid burns to skin
or possible clothing ignition. Carefully
supervise young children when in the
same room as the appliance. Do not place
clothing, or other flammable material, on
or near, the appliance. (Surveille les
enfants. Garder les vêtements, les meubles,
l’essence ou autres liquides à vapeur
inflammables lin de l’appareil.)
Clean the area around, under, and behind the
unit on a regular basis to prevent the
accumulation of dust and lint.
NEVER BURN PAPER, WOOD OR
OTHER MATERIALS
This gas heater is designed to burn natural
gas, or liquid propane (LP). Never burn any
fuel not intended for use with this unit.
•WARNING! This gas appliance
must not be connected to a
chimney flue serving a separate
solid-fuel burning appliance
•WARNING! Do not operate the
appliance with the front glass
removed, cracked, or broken.
Replacement of glass must be done
by a licensed, or qualified, service
person. Only open front for
routine service. Do not slam or
strike glass.
CERAMIC LOG SAFETY
INFORMATION
If the decorative ceramic log material
supplied with the Stowe is damaged, or
missing, it must be replaced with the same,
approved replacement parts supplied by
HearthStone. These components affect the
combustion quality, and safety of the heater.
Do not replace ceramic logs with
unapproved ceramic logs, or any other
material.
Always wear gloves and safety goggles
while handling the log set and ember
materials.
ELECTRICAL HAZARD!
When the optional blower kit is installed, the
Stowe must be electrically grounded in

HearthStone Quality Home Heating Products Inc Stowe Model #8321
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accordance with local codes, or in the
absence of local codes, with the National
Electrical Code, ANSI.NFPA 70 in the U.S.
or CSA C22.1 Canadian Electrical Code in
Canada. The three-prong grounded plug
must be plugged directly into a properly
grounded three-prong receptacle. Do not cut,
or remove, the grounding prong from the
plug or otherwise attempt to circumvent the
grounding protection provided with the unit.
DO NOT LIGHT PILOT OR PAN
BURNER BY HAND
The standing pilot light on this gas heater is
lit by using a piezoelectric spark generator
as described elsewhere in this manual.
Never attempt to light the pilot, or main
burner, by hand with a match or lighter. If,
after repeated attempts, the pilot light fails to
light, discontinue operation; turn off the gas
at the gas control valve, and immediately
contact qualified service personnel for
assistance.
Certified for use by:
Board of State Examiners of Plumbers and Gasfitters
100 Cambridge Street, Room 1511
Boston, Massachusetts 02202
Mobile Home Installations
This appliance may be installed in an
aftermarket, permanently located,
manufactured (mobile) home, where not
prohibited by local codes.
This appliance is only for use with the
type(s) of gas indicated on the rating plate.
This appliance is not convertible for use
with other gases, unless a certified kit is
used.
(Cet appareil peut être installé dans un
maison préfabriquée (mobile) déjá installée
á demeure si les réglements locaux le
permettent.
Cet appareil doit être atilisé uniquement
avec les types de gas indiqués sur la plaque
signalétique. Ne pas l’utiliser avec d’autres
gas sauf si un kited conversion certifié est
installé. )
SERVICE CAUTION
Replace any shield, door, or safety screen
component removed for servicing prior to
operating the stove. If you believe your
Stowe is not performing properly in any way
what so ever; immediately discontinue
operation until qualified service personnel
have inspected the unit. Always shut off the
gas, and electricity (if equipped), to the
stove while servicing. Make sure the unit is
not hot when servicing, or cleaning. Use of
any components not supplied, or specified
by HearthStone on the stove or vent system
voids all warranties. Do not substitute
components.

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SPECIFICATIONS:
LISTED: Gas-Fired Direct-Vent Fireplace Heater
Model: Stowe Direct-Vent Gas Fireplace Heater (8321)
Testing Agency: Intertek Testing Services NA, Inc. (ITS)
Tested to: ANSI Z21.88-2002, CSA 2.33-M02, CAN/CGA2.17-M91
Certified for Canada, CSA P.4.1
Approved for Mobile Home Installation (see page 6)
Figure 1: Stowe Dimensions
FUEL TYPE: NG LP
INPUT RATING (Btu/hr) 0-2000 ft 26,000 26,000
INPUT RATING (Btu/hr) 2000-4500 ft 25,500 25,500
ORIFICE SIZE (DMS) 0-2000 ft 40 53
ORIFICE SIZE (DMS) 2000-4500 ft 41 54
MANIFOLD PRESSURE-LO SETTING (in. W.c./kpa) 1.2/0.3 3.3/0.8
MANIFOLD PRESSURE-HI SETTING (in. W.c./kpa) 3.5/0.87 10.0/2.48
INLET PRESSURE-LO (in.w.c./kpa) 5.0/1.24 11.0/2.88
INLET PRESSURE-HI (in.w.c./kpa) 7.0/1.74 13.0/3.22
MINIMUMINPUT RATING (btu/hr) 15,600 15,600
MAXIMUMOUTPUT (btu/hr) 0-2000 ft 18,100 18,100

HearthStone Quality Home Heating Products Inc Stowe Model #8321
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OWNER’S INFORMATION
The installation must conform with local codes
or, in the absences of local codes, the current
National Fuel Gas Code, ANSI Z223.1 (NFPA
54) or CAN/CGA B149 Installation Code.
(Installer l’appareil selon les codes ou
règlements locaux, ou, en l’absence de tels
règlements, selon les Codes d’installation
CAN/CGA-B149.) Do not use this appliance if
any gas control part was under water.
Immediately call a qualified service
technician to inspect the heater, and to
replace any part of the control system and gas
control that was submerged. (Ne pas se servir
de cet appareil s’il a été plongé dans l’eau,
complètement ou en partie. Appeler un
technicien qualifié pour inspector l’appareil et
remplacer toutepartie du système de contrôle et
toute commande qui ont été plongés dans l’lau.)
DAILY OPERATION
The Stowe gas-fired heater is operated easily
by the homeowner once it is installed and
adjusted by qualified service personnel. The
unit is controlled via the wall-mounted
thermostat during the heating season. Set the
thermostat to the desired room temperature
and the unit will cycle on and off as
required. By adjusting the variable output
control located on the gas control valve, the
rate of heat output can be varied to meet the
heating requirements of the season.
Choosing a low flame setting will result in
longer burn cycles at a reduced output, while
choosing a high flame setting will result in a
shorter, hotter burn cycle. Through trial and
error, the homeowner can select the
optimum flame size for their setting, and
application.
During the summer non-heating season,
switch the wall thermostat to “OFF”, and
turn off the pilot by turning the gas control
to “OFF”. This will improve the overall
efficiency of the unit as the heat from the
pilot is wasted. When putting the unit back
into service, follow the lighting instructions
described on page 28.
When the unit is first lit, especially when
cool, it is normal to experience some
condensation on the inside of the window
glass. This condensation will evaporate
within the first few minutes of operation. If
continuous condensation is observed on the
window glass, or dripping water is seen
coming from any part of the unit or venting
system (chimney), immediately discontinue
operation of the unit, and contact qualified
service personnel.
INSTALLER’S
INFORMATION
CODES
Adhere to all local codes or, in their
absence, the latest edition of THE
NATIONAL FUEL GAS CODE ANSI
Z223.1 (NFPA 54) or CAN/CGA B149
Installation Code that can be obtained from:
AMERICAN NATIONAL STANDARDS
INSTITUTE, INC.
1430 BROADWAY
NEW YORK, NY 10018
OR
NATIONAL FIRE PROTECTION
ASSOCIATION, INC.
BATTERY MARCH PARK
QUINCY, MA 02269
The appliance when operated with a blower
installed, must be electrically connected and
grounded in accordance with local codes or,
in the absence of local codes, with the
current NFPA 70-National Electrical Code
or CSA C22.1-Canadian Electric Code.
A manufactured home (mobile) OEM
installation must conform with the
Manufactured Home Construction and

HearthStone Quality Home Heating Products Inc Stowe Model #8321
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Safety Standard, Title 24 CFR, Part 3280
(U.S.) or Standard for Manufactured Home
Installation, ANSI/NCBCS A225.1 or
Standard for Gas Equipped Recreational
Vehicles and mobile Housing, CSA
Z240.4.CAN/SCA Z240 MH (Canada).
(Installer l’appareil selon les codes ou
règlements locaux, ou, en l’absence de tels
règlements, selon les Codes d’installation
CAN/CGA-B149.)
For installations from 610-1370 meters
(2000-4500 ft.) the orifice sizes (DMS) for
natural and propane gas are 41 and 54
respectively. See data plate for additional
information. For high altitude installations
consult the local gas distributor or the
authority having jurisdiction for proper
rating methods. If the installer must convert
the unit to adjust for varying altitudes, the
information sticker must be filled out by the
installer, and adhered to the appliance at the
same time of conversion. (Cet appareil est
equipè pour des altitudes compries entre 0
et 2000 pieds (0-610 m) seulement.)
ITEMS REQUIRED FOR INSTALLATION
* External regulator (for propane/L.P.G. only)
* Piping which complies with local codes
* Pipe sealant approved for use with
propane/L.P.G. (resistant to sulfur compounds)
* Manual shutoff valve
* Sediment trap (see page 24)
* Tee joint
* Pipe wrench
* Phillips head screwdriver
* 7/16-inch wrench
* Other parts as required by local code
*Safety Glasses
*Gloves
PACKING LIST
1-Stowe Gas-Fired Heater
4-Decorative Ceramic Logs
1-Bag Charcoal Embers Only
1-Bag Charcoal Embers and “Rock Wool”
1-Owner’s Manual
1-Thermostat
1-40’ Thermostat wire
1-L.P. Fuel Conversion Kit
1-Warranty Validation Form
1-Exhaust Restrictor Plate with Mounting Screw
Note: Vent kits and components are supplied
separately. Failure to use the venting
components suggested by HearthStone will
void your warranty.
UNPACKING AND INSPECTION
Unpack and Inspect for Damage
The Stowe is packaged by HearthStone to
withstand normal shipment without damage.
However, damage can still occur during
transit; so take care to inspect for damage
when unpacking and installing the unit. If
any damage, or missing parts are detected,
immediately contact your dealer.
Do not install, or put into service, a
damaged or incomplete heater.
Caution: The top grill is NOT cemented,
or otherwise permanently fastened in
place! We recommend your Stowe be
moved into place, venting attached, gas and
electrical connections made, and any
accessory blower installed before installing
the top grille.
Inspect the Stowe for visible or concealed
damage. The unit should appear to be square
and true. The sheet metal parts should be
smooth and free of bends and dents. The
enameled cast iron should be free of chips or
cracks. If visible or concealed damage is
found, or suspected, contact your dealer for
instructions.
With the accessory box removed and set
aside, undo the lag bolts that fasten the unit
to the pallet. Take care not to mar or chip
the enameled legs. Have someone help lift
the stove off the pallet and set it into place.

HearthStone Quality Home Heating Products Inc Stowe Model #8321
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The decorative ceramic logs supplied with
the Stowe are contained within the firebox.
Always use great care when handling the
decorative ceramic fire logs, as they are
fragile and subject to damage and breakage
if handled roughly. Open the firebox door
and inspect the logs for damage. If a broken
log is encountered, contact your dealer for
replacement logs. Otherwise, set the logs
aside until called for during the installation.
HEARTH REQUIREMENT/FLOOR
PROTECTION
The Stowe may be placed on a non-
combustible surface or wood floor. For
placement of the Stowe on carpeting, vinyl
tile or other combustible materials, the
appliance must be installed on a metal or
wood panel extending the full width and
depth of the appliance. Installations must
meet local codes.
CLEARANCE TO COMBUSTIBLES
Due to high surface temperatures, the unit
should be located out of traffic, and away
from furniture and draperies. Clothing and
other flammable material should not be
placed on or near the heater. When
positioning the unit always maintain
adequate clearances around air openings into
the combustion chamber and allow for
adequate ventilation. Minimum clearances
to combustibles must be maintained as
shown in the illustrations on page 12.
Note: The rear clearance to combustibles
will be determined by either the unit’s or the
vent pipe’s minimum clearance, depending
on whether the installation calls for vertical
rise within the room or a rear exit, through-
the-wall vent pipe.
Be sure to consider the need for access to
the gas control valve access door on the
front of the unit as well as full access for
periodic cleaning and servicing. Also
consider the location of the Optional Blower
Fan.
•Caution: These clearances represent
minimum distances in all cases, which,
through testing in an independent
laboratory to ANSI and CSA
standards, will prevent fire or
spontaneous combustion. We do not
control the combustible materials
exposed to heat by this product;
therefore, an assessment must be
made by the installer to prevent
consequential damage of walls and
flooring.
The corner clearance for the Stowe is 2”
to be measured from the edge of the top
castings, to the adjacent wall.

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Figure 2: Minimum Venting-Mantle Clearance To
Combustibles
Figure 3: Minimum Venting-Wall Clearance To
Combustibles
Figure 4: Snorkel-Mantle Clearance To
Combustibles
Figure 5: Snorkel-Wall Clearance To
Combustibles
The corner clearance for the Stowe is 2”
to be measured from the edge of the top
castings, to the adjacent wall.

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Acceptable Direct-Vent TERMINATION Cap locations.
Figure 6

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VENTING INFORMATION
VENT CONNECTION
Starter collar is installed by HearthStone.
1. The Stowe Direct Vent is approved for
installation only with the vent
connecting components listed on this
page and Simpson Dura-Vent Direct
Vent GS, AmeriVent Direct, or Secure
Vent systems. Use the following
instructions along with the pipe
manufacturer’s instructions to complete
the installation.
2. To attach the Restrictor Plate; see
instructions included with it. It will
attach from inside the firebox, after
removal of the brick patterned baffle.
The two screws required are included in
the appliance. Be sure you can see the
screw head for future adjustments.
a. NOTE: For minimum venting
configurations, discard the
restriction plate-see section
“Approved Vertical
Termination Venting
Configurations”
3. Install the rest of the vent system
according to the manufacturer’s
instructions.
Figure 9: Gasket & Stove Adapter Installation
Figure 7: Starter collar and Restriction Plate
assembly
Figure 9: Key
1. Restriction Plate 5950-922
2. Gasket 4” 3160-155
3. Inner starter 924H1
4. Gasket 6” 3160-157
5. Outer Starter 924H1

HearthStone Quality Home Heating Products Inc Stowe Model #8321
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RESTRICTION PLATE
The restriction plate is used to control the
draft of the heater. Controlling the draft also
changes the aesthetics of the flame. The
restriction plate has eight settings, one (1)
being the lowest and eight (8) being the
highest. For a fast moving flame with lots
of action, use a low setting. For a slow, lazy
flame, a high setting should be used. See
Figure 9 for instructions on how to adjust
the restriction plate settings.
RESTRICTION PLATE POSITION
A vent restriction plate is available for the
appliance to adjust the flow rate of exhaust
gases. This insures proper flames for the
wide variety of vent configurations, and
efficiency. The restriction plate consists of a
rotating shutter below the starter section of
pipe and an adjustment plate with index
holes used to hold the shutter in a fixed
position. Depending on the vent
configuration, you may be required to adjust
the restriction plate position. Refer to page
17-18 for positioning of the restriction plate.
ADJUSTMENT TO RESTRICTION
PLATE
Remove the log set before adjusting the
restriction plate by following the log set
removal instructions on page 24. Make sure
the unit is cool before touching any part of
the firebox and log set. Remove the exhaust
baffle by removing the one screw in the
center of the baffle (refer to Figure 9). The
baffle will come out once the screw is
removed. Be careful not to drop the baffle
on the pan burner. Once the baffle is set
aside, check the restriction plate screw
location. There are eight locations that the
restriction plate can be positioned. (Refer to
Venting Configuration –Figures 10 –15 for
recommended restriction plate positions)
(Refer to Figure 7 for proper adjustment
plate index location) ‘A’ in Figure 9 shows
the locating screw that determines the
position of the plate.
NOTE: These positions are based on lab
results and can have some variance.
Remove the screw and position the
restriction plate in the desired location.
Fasten the screw into the proper hole and
tighten. Reinstall the exhaust baffle by
setting the back edge of the baffle into the
baffle clip attached to the back wall of the
firebox. Then push the baffle against the
heat exchanger and reinstall the screw.
Reinstall the log set and ember strip as
described in the log set installation
procedure on page 27.
Figure 8: Baffle Removal
Figure 9: Restriction Plate Adjustments

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VENTING COMPONENTS &
CONFIGURATION
The Stowe cannot be vented jointly with any
other solid fuel or gas appliance. It must be
vented directly to the outside of the building
using a proper termination as listed in the
manual. The only type of venting pipe
approved for use with your Stowe Direct-
Vent stove is Simpson Dura-Vent’s GS,
AmeriVent Direct, and Secure Vent Direct-
Vent Pipe. The venting configurations are
shown in Figures 10 -15. After determining
the venting configuration for your stove,
select the vent system that will
accommodate your installation.
Caution: Make sure all stove and
termination cap clearances have been
observed per the Owner’s Manual.
Caution: Be sure there is no wiring or
plumbing in the chosen location.
Caution: Venting terminals shall not be
recessed into a wall or siding.
Note: If further direction is needed for
installation, please refer to the venting
instructions, which are provided with the
venting components.
ACCEPTABLE DIRECT-VENT
TERMINATION CAP LOCATIONS
The vent/air intake termination clearances
above the high side of an angled roof are as
follows:
Roof Pitch Feet Meters
Flat to 6/12 1 0.3
7/12 to 9/12 2 0.6
10/12 to 12/12 4 1.2
13/12 to 16/12 6 1.8
17/12 to 21/12 8 2.4
Listed below are Simpson Dura-Vent,
AmeriVent Direct, and Secure Vent
components acceptable for installation,
along with the minimum venting kit
available. The venting system must be
comprised of the appropriate venting
components as specified.
APPROVED VENTING SYSTEM
COMPONENTS
*Component Description
900 Elbow
450 Elbow
6" Straight
9" Straight (Simpson only)
12" Straight
24" Straight
36" Straight
48" Straight
11"-14 5/8" Adjustable Pipe Length
Horizontal Vent Cap
Vertical Vent Cap
14” Snorkel
Vinyl Siding Standoff 4 x 65/8"
Round Ceiling Support Wall
Thimble Covers
Wall thimble
CHIMNEY LINER SYSTEM
1. Direct-Vent Chimney Liner Termination
Kit
2. Chimney Liner Flex
3. Co-Linear Flex Connector
4. Co-Axial to Co-Linear Appliance
Connect
*MINIMUM VENT KIT
*HearthStone Stove Starter Collar
45º Elbow
90º Elbow
(2) 9” Straight
Round Ceiling Support
Wall Thimble Cover
Wall Thimble
Horizontal Vent Cap
*Supplied by HearthStone

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Centerlineof
vent, with a 45
degree elbow
attached.
45degreeelbow
wall thimble cover
9"straight
wall thimble
14" snorkel
Figure 10: Components For a Typical Snorkel Installation
907B
942
940
945B
907B
990B
984
Figure 11: Components for a Typical Minimum Horizontal Venting Installation
Centerlines shown are approximate.
Please dry fit your venting and take a
measurement. Pipe dimensions will vary
by manufacturer and supplier.
See installation instructions on page 23.

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APPROVED VERTICAL TERMINATION VENTING CONFIGURATIONS WITH
NO ELBOWS OR (2) 45º OFFSETS (FIGURE 12), AND (2) 90º ELBOWS
(FIGURE 13)
•10’ minimum system height (with or without offsets)
•35’ maximum system height
•6’ maximum offset (refer to Figure 12)
•12’ maximum offset (refer to Figure 13)
•The termination must fall within the outline shown in Figures 12 & 13. Use the indicated
restriction plate position. The restriction Plate part # is 5950-922.
CLEARANCES FROM THE PIPE TO COMBUSTIBLES:
1” to vertical runs
1” below and to the side of horizontal runs
2” from the top of horizontal runs
FIGURE 12 VERTICAL TERMINATIONS USING STRAIGHT
PIPE
FIGURE 13 VERTICAL TERMINATIONS USING (2)
90º ELBOWS

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APPROVED VENTING CONFIGURATION FOR HORIZONTAL TERMINATION,
(1) 90º ELBOW
•The termination must fall within the area outlined by the shaded area shown in the
illustration below.
•A minimum of a 9” rise is required directly off the heater.
•Use a vinyl siding standoff when installing against vinyl siding.
•Horizontal sections require a ¼” rise every 12” of horizontal run.
NOTES:
1. The vent must terminate within one of the regions outlined by the shaded area.
2. For each 90º elbow after 2, remove 5’ from horizontal run.
3. For Canadian installations: remove 4’ from horizontal run.
4. At minimum vertical rise, maximum horizontal run 14”.
5. Use with snorkel termination 14” maximum horizontal run.
FIGURE 14 HORIZONTAL TERMINATION

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APPROVED CONFIGURATION FOR FIREPLACE INSTALLATION
•The termination must fall within the demarcation line shown in the illustration. Use the
indicated restriction plate position. Restriction plate # 5950-922.
FIGURE 15. CO-LINEAR & CHIMNEY AS ANAIR INLET

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INSTALLATION INSTRUCTIONS
FOR THE STANDARD HORIZONTAL
TERMINATION MINIMUM
VENTING KIT (KIT #97-65001)
1. The starter collar is factory installed.
Determine if you need a Restriction
disc, and install or not.
2. Install the 45º elbow over the outer
collar. Place the elbow so that the
twist lock end is pointing up.
3. Install one of the 9” pipe sections
into the elbow by fully inserting it
and turning approximately ¼ turn
clockwise, until the 2 sections are
fully locked. Install the 90º elbow in
similar fashion.
4. Move the stove and pipe assembly
back until the 90º elbow is flush to
the wall. The 9” vertical pipe should
be parallel to the wall. Draw a circle
around the pipe. Use the center of
this circle as the center point of the
10” x 10” square wall pass through.
Cut and frame the wall pass through.
5. Place the interior wall thimble into
the 10” x 10” wall pass through.
Secure it with 4 screws (not
provided). Install the exterior portion
of the thimble in similar fashion,
overlapping the 2 sections.
•Caution: For building with vinyl
siding, a vinyl siding standoff should
be installed between the vent cap and
the exterior wall.
6. Install the horizontal vent
termination on the outside of the
wall. Make sure both of the retaining
straps extend through interior wall
thimble. Before attaching the vent
termination to the outside of the
house, run a bead of non-hardening
mastic around its’ outside edges, so
as to make a seal between it and the
wall. The arrow on the end cap
should point up. Secure the cap to
the wall with the appropriate screws.
7. Place the thimble cover onto the 90º
elbow. Put the 9” pipe into the
horizontal vent cap, (the vent pipe
must extend into the horizontal vent
cap a minimum of 1-1/4”). Move the
stove and vent pipe into position,
insert the 9” pipe into the 90º elbow
and twist to lock it. Secure the straps
from the horizontal vent termination
to the interior pipe with 2 sheet metal
screws, keeping screws close to wall
thimble as possible. Bend or cut the
excess strapping so that the thimble
cover will fit properly. Screw the
thimble cover to the wall.