HearthStone Stowe User manual

Stowe Model 8325
Manual: 6400-41425
R: 6/2/2022
Stowe (Model 8325)
Gas-Fired Direct Vent Heater
Owner’s Manual
Operation & Installation Guide
Read This Owner’s Manual
Operate and Maintain This Gas Heater
According to This Instruction Manual.
Save These Instructions!
WARNING: FOLLOW THE INFORMATION IN
THESE INSTRUCTIONS EXACTLY, IF NOT, A FIRE
OR EXPLOSION MAY RESULT CAUSING
PROPERTY DAMAGE, PERSONAL INJURY OR
LOSS OF LIFE.
WARNING: DO NOT STORE OR USE GASOLINE
OR ANY 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 phone
outside the structure. Follow your gas supplier’s
instructions.
If you cannot reach your gas supplier, call the fire
department or 911.
A qualified installer, service agency, or gas supplier must
perform installation and service of this appliance. In the
Commonwealth of Massachusetts, all installation of gas
lines and gas fittings must be performed 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.
AVERTISSEMENT: 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.
Ce manual est disponible en Francais a
www.hearthstonetech.com
WARNING: This product can expose you to
chemicals including glass wool fiber and carbon
monoxide which are known to the State of California to
cause cancer, birth defects or other reproductive harm.
For more information go to www.P65Warnings.ca.gov
California Prop 65
PFS File #20-640
Tested to: ANSI Z21.88-2017
CSA 2.33-2017, CSA 2.17-17

Page 1 of 33
Intentionally Blank

Page 2 of 33
Information Sheet
Use this page to record all relevant information concerning the purchase, installation, and maintenance of your
Stowe Model 8325 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:
Natural Gas
Liquid Propane
Sold by:
Date of Purchase:
Address:
Phone:
E-mail
Website:
Installed by:
Date of Installation:
Address:
Phone:
E-mail
Website:
Gas Supplier:
Address:
Phone:
E-mail
Website:
Read this Owner’s Manual before installing or operating your Stowe. Retain this manual for future reference.
SERVICE RECORD
Date
Who Performed Work
Work Performed
Notes:
WHAT WHEN
Firebox Cleaning............. annually
Glass Cleaning................ as needed
Gaskets.................... Replacement as needed
Glass inspection………… yearly, replace as needed

Page 1 of 33
INDEX
Specifications………………………………………………………………………………………4
Introduction………………………………………………………………………………………...5
Safety Information…………………………………………………………………………………5
Installation Preparation…………………………………………………………………………..7
Codes…………………………………………………………………………………………………………….....7
Items Required for Installation………………………………………………………………………………… 8
Packing List………………………………………………………………………………………………………. 8
Unpacking and Inspection……………………………………………………………………………………… 8
Clearances to Combustibles…………………………………………………………………….9
Hearth Requirement/Floor Protection………………………………………………………………………….. 9
Venting Information……………………………………………………………………………...10
Venting Connection……………………………………………………………………………………………. 10
Approved Systems……………………………………………………………………………………………. 11
Minimum Venting……………………………………………………………………………………………… 12
Electrical System Information………………………………………………………………….16
Gas Supply & Connections……………………………………………………………………..17
Gas Connections………………………………………………………………………………………………….18
Initial Leak Check………………………………………………………………………………………………...18
Pre-Ignition Checks ….………………………………………………………................................................18
Firebox/Log Set Placement……………………………………………………………………. 19
Installation………………………………………………………………………………………………………… 19
Removal…………………………………………………………………………………………………..............20
Initial Lighting Instructions……………………………………………………………………. 21
Manual Ignition Instructions…………………………………………………………………………………….. 21
Air Shutter/Restrictor…………………………………………………………………………………………... 22
Routine Maintenance and Care……………………………………………………………….. 23
Parts List………………………………………………………………………………………….. 26
Troubleshooting…………………………………………………………………………………. 27
Rating Label……………………………………………………………………………………….30
Warranty…………………………………………………………………………………………... 31

Hearthstone Quality Home Heating Products, Inc STOWE Model 8325
2
SPECIFICATIONS
Testing Agency: Intertek Testing Services NA, Inc.
(ITS)
Listing Agency: PFS Teco
Listed: Direct Vent Gas Heater
Model: Stowe Model 8325
Tested to: ANSI Z21.88-2017 CSA 2.33-2017
CSA 2.17-2017
Approved for Mobile Home Installation
Certified for use by:
Board of State Examiners of Plumbers and Gasfitters
100 Cambridge Street, Room 1511
Boston, Massachusetts 02202
Manufactured and Warranted by:
Hearthstone Quality Home Heating Products, Inc.
317 Stafford Ave.
Morrisville, VT 05661-8695, USA
www.hearthstonestoves.com
Figure 1 Stowe DV Dimensions
Specification
NG
LP
Input rating (Btu/hr) 0-2000 ft
22,400
22,400
Input rating (Btu/hr) 2000-4500 ft
22,400
22,400
Orifice size DMS 0-2000 ft
43
54
Orifice size DMS 2000-4500 ft
42
54
Man. press.-LO setting (in.w.c./kPa)
1.2/.030
4.2/1.05
Man. press.-HI setting (in.w.c./kPa)
3.6/0.90
10.1/2.52
Inlet press.-LO setting(in.w.c./kPa)
5.0/1.24
11.0/2.74
Inlet press.-HI setting(in.w.c./kPa)
7.0/1.74
13.0/3.22
Minimum input rating rating (Btu/hr)
15,000
15,000
12”
20 ½”

Hearthstone Quality Home Heating Products, Inc STOWE Model 8325
3
INTRODUCTION
Congratulations on your purchase of the Stowe
Model 8325, Gas-Fired Direct-Vent heater. The
Stowe, by Hearthstone, incorporates the latest in
direct vent gas technology, which will provide you
with clean, efficient heat for years to come. The
enameled or painted 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 and safely
installed and maintained by qualified service
personnel to ensure safe and trouble-free operation.
STOWE MODEL 8325 FEATURES:
1. SIT 820 valve system
2. 5-piece log set
3. Safety Barrier Screen
4. Platinum Bright Embers.
5. Optional blower
Part #
Description
8325-0010NP
Matte Black
8325-0020NP
Brown Enamel
8325-0031NP
Oyster Enamel
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.
Heater Must Be Installed and Maintained By
Qualified Service Personnel
Verify the gas connections and venting systems meet
the requirements of local, regional or national
installation codes. Qualified service personnel must
inspect the gas heater before use, and at least
annually.
Manufactured & warranted by:
Hearthstone Quality Home heating Products, Inc.
317 Stafford Ave.
Morrisville, VT 05661
www.hearthstonestoves.com
[e-mail]
SAFETY INFORMATION
Your Stowe is an attractive and extremely efficient
heater, 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.)
CAUTION: DO NOT USE THIS APPLIANCE IF ANY
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 HAS
BEEN UNDER WATER. (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 smoke and/or odor. This is normal
during the first several burns and also after long
periods when the stove is not burned. During these
initial burns, open a window(s) to assist in the
removal of the smoke/odor.
The appliance and its individual shutoff valve must be
disconnected from the gas supply piping system
during any pressure testing of that system at test
pressures in excess of ½ psig. (3.5k Pa). The
appliance must be isolated from the gas supply
piping system by closing its individual manual shutoff
valve during any pressure testing of the gas supply
piping system at test pressures equal to or less than
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.
Locate the Stowe out of traffic areas and away from
furniture, draperies, clothing, and flammable material.
Vent Only to the Outside.
Never vent the gas heater to other rooms or
buildings.
Service Caution
If you believe your Stowe is not, in any way,
performing properly, immediately discontinue

Hearthstone Quality Home Heating Products, Inc STOWE Model 8325
4
operation until the unit is inspected and approved by
qualified service personnel. Prior to servicing the
unit, turn the gas to the valve off, and disconnect any
electrical source. Ensure the unit is cool prior to
servicing and cleaning. Replace any safety screen,
guard, or component removed during servicing prior
to operation. Use of any components not supplied by
Hearthstone on the stove voids all warranties. Do not
substitute components.
Proper Fuel
This gas heater is designed to burn natural gas (NG)
or with conversion, liquid propane (LP). Never burn
any fuel gas not intended for use with this unit. Never
burn paper, wood, or other materials in this
appliance.
This heater is factory equipped to burn natural gas
(NG). To burn propane (LP), you must install the
included LP conversion kit #93-56241
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 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. )
WARNING: THIS GAS APPLIANCE MUST NOT BE
CONNECTED TO A CHIMNEY FLUE SERVING A
SEPARATE GAS OR SOLID-FUEL BURNING
APPLIANCE
WARNING: DO NOT OPERATE THE APPLIANCE
WITH THE FRONT GLASS REMOVED, CRACKED,
OR BROKEN. REPLACEMENT OF GLASS SHOULD
BE DONE BY A LICENSED OR QUALIFIED SERVICE
PERSON. ONLY OPEN FRONT FOR ROUTINE
SERVICE. DO NOT SLAM FRONT OR STRIKE
GLASS.
WARNING: HEARTHSTONE RECOMMENDS THAT
ONLY AN NFI CERTIFIED SERVICE TECHNICIAN
INSTALLS, AND REPAIRS THIS APPLIANCE. A
QUALIFIED SERVICE TECHNICIAN MUST INSPECT
THE APPLIANCE BEFORE USE, AND AT LEAST
ANNUALLY. MORE FREQUENT CLEANING MAY BE
REQUIRED DUE TO EXCESSIVE LINT FROM
CARPETING, BEDDING MATERIAL, PETS, ETC. IT IS
IMPERATIVE THAT THE CONTROL
COMPARTMENTS, BURNERS, AND CIRCULATING
AIR PASSAGES OF THE APPLIANCE ARE KEPT
CLEAN AND FREE OF OBSTRUCTIONS.
(S’ASSURER QUE LE BRÛLEUR ET LE
COMPARTIMENT DES COMMANDES SONT
PROPRES. VOIR LES INSTRUCTIONS
D’INSTALLATION ET D’UTILISATION QUI
ACCOMPAGNENT L’APPAREIL.)
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
SHOULD BE LOCATED OUT OF TRAFFIC AND
AWAY FROM FURNITURE, DRAPERIES, CLOTHING
AND FLAMMABLE MATERIALS. EN RAISON DES
TEMPÉRATURES ÉLEVÉES, L’APPAREIL DEVRAIT
ÊTRE INSTALLÉ DANS UN ENDROIT OÙ IL Y A PEU
DE CIRCULATION ET LOIN DU MOBILIER ET DES
TENTURES
CHILDREN AND ADULTS SHOULD BE ALERTED TO
THE HAZARDS OF HIGH SURFACE
TEMPERATURES AND SHOULD STAY AWAY TO
AVOID BURNS TO SKIN OR CLOTHING IGNITION.
LES ENFANTS ET LES ADULTES DEVRAIENT ÊTRE
INFORMÉS DES DANGERS QUE POSENT LES
TEMPÉRATURES DE SURFACE ÉLEVÉES ET SE
TENIR À DISTANCE AFIN D’ÉVITER DES
BRÛLURES OU QUE LEURS VÊTEMENTS NE
S’ENFLAMMENT.
CAREFULLY SUPERVISE YOUNG CHILDREN WHEN
THEY ARE IN THE SAME ROOM AS THE
APPLIANCE. TODDLERS, YOUNG CHILDREN, AND
OTHERS MAY BE SUSCEPTIBLE TO ACCIDENTAL
CONTACT BURNS. A PHYSICAL BARRIER IS
RECOMMENDED IF THERE ARE AT RISK
INDIVIDUALS IN THE HOUSE. TO RESTRICT
ACCESS TO A FIREPLACE OR STOVE, INSTALL AN
ADJUSTABLE SAFETY GATE TO KEEP TODDLERS,
YOUNG CHILDREN, AND OTHER AT RISK
INDIVIDUALS OUT OF THE ROOM AND AWAY
FROM HOT SURFACES. LES JEUNES ENFANTS
DEVRAIENT ÊTRE SURVEILLÉS ÉTROITEMENT
LORSQU’ILS SE TROUVENT DANS LA MÊME PIÈCE
QUE L’APPAREIL. LES TOUT PETITS, LES JEUNES
ENFANTS OU LES ADULTES PEUVENT SUBIR DES
BRÛLURES S’ILS VIENNENT EN CONTACT AVEC
LA SURFACE CHAUDE. IL EST RECOMMANDÉ
D’INSTALLER UNE BARRIÈRE PHYSIQUE SI DES
PERSONNES À RISQUES HABITENT LA MAISON.
POUR EMPÊCHER L’ACCÈS À UN FOYER OU À UN
POÊLE, INSTALLEZ UNE BARRIÈRE DE SÉCURITÉ;
CETTE MESURE EMPÊCHERA LES TOUT PETITS,
LES JEUNES ENFANTS ET TOUTE AUTRE
PERSONNE À RISQUE D’AVOIR ACCÈS À LA PIÈCE
ET AUX SURFACES CHAUDES.
CLOTHING OR OTHER FLAMMABLE MATERIAL
SHOULD NOT BE PLACED ON OR NEAR THE
APPLIANCE. ON NE DEVRAIT PAS PLACER DE
VÊTEMENTS NI D’AUTRES MATIÈRES
INFLAMMABLES SUR L’APPAREIL NI À
PROXIMITÉ.
CLEAN THE AREA AROUND, UNDER, AND BEHIND
THE UNIT ON A REGULAR BASIS TO PREVENT THE
ACCUMULATION OF DUST AND LINT

Hearthstone Quality Home Heating Products, Inc STOWE Model 8325
5
Ceramic Logs, Burner, & Baffle
If the decorative ceramic log or burner material
supplied with the Stowe is damaged or parts are
missing, they must be replaced with the same, or
approved Hearthstone replacement parts. These
components affect the combustion quality and safety
of the heater. Do not replace ceramic logs, the
burner, or baffle with unapproved ceramic
components or any other material. We recommend
you always wear gloves and safety goggles while
handling the ceramic log set and burner materials.
Electrical Hazard
If present, any three-prong grounded plug must be
plugged directly into a properly grounded three-
prong
receptacle. Do not cut or remove the grounding
prong from any plug or otherwise attempt to
circumvent the grounding protection provided with
the unit. The Stowe must be electrically grounded in
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.
Do Not Light Pilot or Burner by Hand
The pilot light on this gas heater is lit by using the
remote control as described elsewhere in this
manual. Never attempt to light the pilot or main
burner by hand with a match or lighter.
INSTALLATION PREPARATION
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
(Installer l’appareil selon les codes ou règlements
locaux, ou, en l’absence de tels règlements, selon
les Codes d’installation CAN/CGA-B149.)
Installation Codes can be obtained from:
AMERICAN NATIONAL STANDARDS
INSTITUTE, INC.
1430 BROADWAY
NEW YORK, NY 10018
www.ansi.org
NATIONAL FIRE PROTECTION
ASSOCIATION, INC.
BATTERY MARCH PARK
QUINCY, MA 02269
www.nfpa.org
The appliance when 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.
Mobile Home Installations
This appliance may be installed in an aftermarket
permanently located, manufactured home (USA
only), where not prohibited by local codes.
This appliance is only for use with the type of gas
indicated on the rating plate. This appliance is not
convertible for use with other gasses, unless a
certified kit is used.
A manufactured home (mobile) OEM installation
must conform to the Manufactured Home
Construction and 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). This appliance is only for use with the
type(s) of gas indicated on the rating plate. Cet

Hearthstone Quality Home Heating Products, Inc STOWE Model 8325
6
appareil peut être installé comme du matériel
d’origine dans une maison préfabriquée (É.-U.
seulement) ou mobile et doit être installé selon les
instructions du fabricant et conformément à la norme
Manufactured Home Construction and Safety
Standard, Title 24 CFR, Part 3280 aux États-Unis ou
à la norme CAN/CSA-Z240 Série MM, Maisons
mobiles au Canada. Cet appareil doit être utilisé
uniquement avec les types de gaz indiqué s sur la
plaque signalétique.
This appliance is equipped for use at 0 to 2000 feet
(0-610 meters) altitude. (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 (LP) only)
LP conversion kit (for propane only))
Piping which complies with local codes
Pipe sealant approved for use with
propane (LP) (resistant to sulfur compounds).
Manual shutoff valve
Sediment trap (see page 18)
Pipe wrench
Phillips head screwdriver
7/16-inch wrench
5/23” (4mm) allen wrench
Other parts as required by local code
Safety Glasses
Gloves
Packing List
1- Stowe 8325 Gas-Fired Heater
1- Pan Burner
1- Owner’s Packet (manual, warranty card)
1- LP Conversion Kit
5- Decorative Ceramic Logs (in separate box)
1- Bag of Platinum Bright Embers
Note: Vent kits and components are supplied
separately. Failure to use the venting
components approved by Hearthstone for this
appliance will void your warranty.
Unpacking and Inspection
Hearthstone packages your Stowe to withstand
normal shipment without damage. However,
damage can still occur during transit. Take care to
inspect for damage when unpacking and installing
the unit.
DO NOT INSTALL, OR PUT INTO SERVICE, A
DAMAGED OR INCOMPLETE HEATER.
Remove the shrink-wrap and other packaging
materials taking care not to damage the stove’s
finish. Inspect the Stowe for visible or concealed
damage. The unit should be square and true. The
sheet metal parts should be smooth and free of
bends and dents. Any enameled cast iron should be
free of chips or cracks. If visible or concealed
damage is found or suspected, contact your dealer
for instructions.
Always use gloves and eye protection when
handling the decorative ceramic fire logs and burner.
Use care when handling these parts as they are
fragile and subject to damage and breakage if
handled roughly.
See the firebox access instructions on page 9.
Unpack and inspect the logs for damage. Inspect the
metal burner as well. Open the other boxes and
inspect the components. If log, burner or any other
component damage is encountered, contact your
dealer for a replacement. Otherwise, set the logs
and other components aside until called for during
the installation.
Dismounting from Pallet
With the accessory boxes removed and set aside,
remove the four lag screws that fasten the unit to the
pallet. Take care not to mar or chip the stove’s finish.
Have someone help lift the stove off the pallet,
taking care to avoid damaging components mounted
under the stove.
INSTALLER: Leave this manual with the appliance.
INSTALLATEUR : Laissez cette notice avec
l’appareil.
CONSUMER: Retain this manual for future
reference.
CONSOMMATEUR : Conservez cette notice
pour consultation ultérieure
Firebox Access
1. Remove top of the stove (lift off). Set carefully
aside on a soft surface.
Figure 2 –Top Removal

Hearthstone Quality Home Heating Products, Inc STOWE Model 8325
7
2. Release the front panel by lifting up and off of
the stove body. Set aside on a soft surface.
Figure 3 –Front Panel Removal
3. While holding the glass to the firebox with one
hand in the top middle, remove the glass
retention clips one side at a time by grasping the
spring-loaded retention clip handle, pulling
forward and moving the clip free of the glass
frame hook. Lean the glass away from the
firebox at the top and pick straight up off of the
stove.
Figure 4 –Glass Removal
4. Reinstall by reversing the previous steps.
Clearances to Combustibles
Note: Ensure clearances are in accordance with
local installation codes and the requirements of
the gas supplier. Dégagement conforme aux
codes d’installation locaux et aux exigences du
foumisseunde gaz.
Due to high surface temperatures, locate the
unit out of traffic areas and away from furniture
and draperies. Do not place clothing and other
flammable material 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 Figures 5 - 8.
Note: The rear clearance to combustibles is
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. Ensure you
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 clearance for the blower assembly if
present, or planned in the future
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.
Hearth Requirement/Floor Protection
You can place the Stowe directly on any non-
combustible surface or on a wood floor. When
placing the Stowe on any other type of combustible
surface you must install a panel made of metal,
wood, stone, or glass under the appliance. The
panel must extending the full width and depth of the
appliance. Installations must meet all local codes.
Installing the stove in a room with Luxury Vinyl Plank
(LVP) or Luxury Vinyl Tile (LVT) flooring requires a
minimum clearance from the stove to the LVP or

Hearthstone Quality Home Heating Products, Inc STOWE Model 8325
8
LVT flooring. LVP and LVT flooring begins to warp at
110 degrees Fahrenheit. The minimum required
clearance for the LVP or LVT flooring to the front
glass of the stove is 6”.
Figure 5 - Minimum Wall Clearances
Figure 6 - Corner Clearances
Figure 7 - Horizontal Vent Mantle Clearance
Figure 8 - Snorkel Termination Mantle Clearance

Hearthstone Quality Home Heating Products, Inc STOWE Model 8325
9
VENTING INFORMATION
VENTING COMPONENTS
Starter collar is installed by Hearthstone.
Use the following instructions along with the pipe
manufacturer’s instructions to complete the
installation. Do not mix vent components from
different manufacturers within the same venting
system.
APPROVED VENTING MANUFACTURERS
The Stowe Direct Vent (8325) is approved for
installation only with the venting components
provided by manufactures listed on this page.
Simpson Dura-Vent, Inc.
P.O. Box 1510
Vacaville, CA 95696-1510 800-835-4429
American Metal Products (AmeriVent)
8601 Hacks Cross Rd.
Olive Branch, MS 38654 800-423-4270
Selkirk Corporation
1301 W. President George Bush Hwy, Suite 330
Richardson, TX 75080-1139 800-992-8368
Security Chimneys International Ltd (Secure Vent)
2125 Monterey, Laval, Quebec
Canada, H7L 3T6 450-973-9999
ICC, Inc.
400 J-F Kennedy, St. Jerome, Quebec
Canada, J7Y 4B7 450-565-6336
Metal-Fab, Inc.
P.O. Box 1138
Wichita, Kansas 67201 316-943-2351
VENTING TERMINATIONS
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 this manual. After
determining the venting configuration for your stove,
select the vent system that will best accommodate
your installation.
CAUTION: ENSURE ALL STOVE AND
TERMINATION CAP CLEARANCES ARE
OBSERVED PER THIS OWNER’S MANUAL.
CAUTION: ENSURE THERE IS NO WIRING OR
PLUMBING IN THE CHOSEN LOCATION.
CAUTION: DO NOT RECESS VENTING
TERMINALS INTO A WALL OR SIDING.
APPROVED VENTING CONFIGURATIONS
WARNING: IN HIGH WIND AREAS AND
PARTICULARLY COLD CLIMATES IT MAY BE
NECESSARY TO HEAT YOUR VENT SYSTEM
WITH THE PILOT PRIOR TO IGNITION OF THE
MAIN BURNER. IN THESE INSTANCES IT IS
RECOMMENDED THAT YOU LEAVE THE PILOT
RUNNING FOR 5 MINUTES PRIOR TO IGNITING
THE MAIN BURNER. THIS WILL ALLOW FOR
PROPER START UP AND IGNITION OF ALL
PORTS ON THE BURNER.
There are three types of venting configurations
approved for use with this appliance:
Vertical Venting/Vertical Termination
Vertical Venting/Horizontal Termination
Horizontal Venting/ Snorkel Termination
Pipe Clearances to combustibles:
1" to vertical runs
1" below and to the side of horizontal runs
2" from the top of horizontal runs
Vertical Venting and Termination
The Stowe 8325 is approved for venting vertically
through a roof or ceiling. When installing a vertical
vent and/or vertical terminations you must adhere to
the following requirements:
When terminating vertically you must have at
least 10’ of vertical pipe.
Always maintain a minimum of 1” clearance from
all sides of the vent system to any combustible
material (2” from top).
A listed fire stop is required at any floor
penetration. The opening must be framed in
according to the venting manufacturer’s
instructions.
Steep roofs, nearby trees, or predominantly
strong windy conditions can promote poor draft
or down draft conditions. In this event, an
increase to the height of the vent may improve
performance.
A maximum of two 90⁰or four 45⁰elbows may
be used in vertical terminations. (This includes
the one 45⁰elbow off the stove outlet)
Whenever possible use 45⁰elbows instead of
90⁰elbows as they offer less restriction to the
flue gases.
Vertical terminations may require additional
restriction in order to perform as intended.
Please refer to Figures 29 & 30 to adjust your
vent restrictor accordingly

Hearthstone Quality Home Heating Products, Inc STOWE Model 8325
10
All termination caps must be no less than 18”
(457mm) horizontally from any roof or vertical
surface. See Figure 9.
The termination must fall within the chart in
Figure 13.
The maximum vertical run is 35’
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
Figure 9 - Termination Cap clearances
PREFABRICATED &FIREPLACE CHIMNEY
INSTALLATIONS
The Stowe 8325 is approved for use with direct vent
chimney conversion kits in masonry or prefabricated
solid fuel listed chimneys. The following installation
requirements must be followed:
The termination must fall within the chart shown
in Figure 12.
In a masonry chimney, a fireclay liner or listed
steel liner, must be present the entire length of
the chimney.
The maximum length of vent is 35’.
The liner must have an inside dimension or
diameter 6” or greater.
Prefabricated chimneys must be UL103 or ULC
S-629 listed and have a minimum INSIDE
diameter of 6”. Prefabricated chimneys must be
listed for the specific manufacturer’s conversion
kit.
The use of an existing chimney as an air intake is
not listed under the ANSI Z21.88 / CSA 2.33-2016
test methods; this installation has been tested and
approved by Intertek Testing Services with an
appropriate test. The code authority having
jurisdiction must be consulted p rior to proceeding
with this installation method.
HORIZONTAL TERMINATION
The termination must fall within the area shown
in Figures 9 & 12.
A minimum of 9" rise is required either directly
off the heater or with the use of a minimum of a
14” snorkel.
Use a vinyl siding Stand-Off when installing
against vinyl siding. The termination cap must
not be recessed into the wall or siding. Do not fill
air spaces with any type of insulation material.
A minimum 10”X10” square hole is necessary
for proper pipe clearance through a wall,
provided the vent is positioned to maintain 2”
minimum clearance at the top. A 1” minimum
clearance must be maintained to combustible
materials around the other sides.
All horizontal terminations must also comply with
the clearance specifications to adjacent
structures outlined in Figures 9 & 12.
Horizontal sections require a 1/4" rise every 12"
of horizontal run.
NOTE: For each 90 0 elbow after 2, remove 5' from
the allowable horizontal run. For Canadian
installations: remove 4' from the allowable
horizontal run.
At minimum vertical rise, maximum horizontal
run is 10’. (If a 14” snorkel termination is used a
maximum horizontal run of 10’ is also
applicable.)
WARNING: FAILURE TO USE ONLY PARTS
SPECIFICALLY APPROVED FOR USE WITH THIS
APPLIANCE MAY RESULT IN PROPERTY
DAMAGE OR PERSONAL INJURY.

Hearthstone Quality Home Heating Products, Inc STOWE Model 8325
11
MINIMUM VENTING INSTALLATION
INSTRUCTIONS
1. Install the 45º elbow over the outer collar. Place
the elbow so that the twist lock end is pointing
up.
2. 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.
3. 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.
4. 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 BUILDINGS WITH VINYL SIDING,
INSTALL A VINYL SIDING STANDOFF BETWEEN
THE VENT CAP AND THE EXTERIOR WALL.
5. Install the horizontal vent termination on the
outside of the wall. Ensure 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.
6. 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 the
screws as 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.
Figure 11 - Components for a Typical Minimum
Horizontal Venting Installation
Centerlines shown are approximate. Ensure you dry
fit your venting and take a measurement. Pipe
dimensions will vary by manufacturer and supplier.
These dimensions are using typical Simpson Dura-
Vent GS components. See installation instructions
on this page.
Figure 10 - Components for a Typical Snorkel
Installation

Hearthstone Quality Home Heating Products, Inc STOWE Model 8325
12
Figure 12 - Acceptable Direct Vent Terminal Vent Cap Locations
A = Clearance above grade, veranda, porch, deck, or
balcony: 12 inches (30cm) minimum.
B = Clearance to window or door that may be opened:
**Min. 9 inches U.S./*12 inches (30cm) CAN. We
recommend 12 in, minimum to prevent condensation on
the window.
C = Clearance to permanently closed window: **Min. 9
inches, U.S./*12 inches (30cm) CAN.
We recommend 12 in. minimum to prevent condensation
on the window.
D = Vertical clearance to ventilated soffit located above
the termination within a horizontal distance of 2 feet
(60cm) from the center line of the termination: 18 inches
(46cm) minimum.
E = Clearances to unventilated soffit: 12 inches (30cm)
minimum.
F = Clearance to outside corner: **Min. 9 inches, U.S./12
inches (30cm) CAN. We strongly recommend 12 inches,
particularly where windy conditions prevail.
G = Clearance to inside corner: **Min. 6 inches, U.S./12
inches (30cm) CAN. We strongly recommend 12 inches,
particularly where strong winds prevail.
H = *Not to be installed within 15 feet (4.5m) above a
meter/regulator assembly within 3 feet (91cm)
horizontally from the center line of the regulator.
I = Clearance to service regulator vent: 3 feet (91cm)
J = Clearance to non-mechanical air supply inlet to
building or the combustion air inlet to any other appliance:
12inches (30cm) minimum.
K = Clearance to a mechanical air supply inlet: **Min. 3
feet (91cm) above if within 10 feet horizontally, U.S./*6
feet (1.83m) CAN minimum.
L = ¹Clearance above paved sidewalk or a paved
driveway located on public property: 7 feet (2.1m)
minimum.
M = ²Clearance under veranda, porch, deck, or balcony:
12 inches (30cm) minimum.
*In accordance with CSA B149 Installation codes.
**In accordance with the current ANSI Z223.1/NFPA 54,
National Fuel Gas Code. Note: Local Codes and
Regulations may require different clearances.
¹A vent shall not terminate directly above a sidewalk or
driveway which is located between two single family
dwellings and serves both dwellings
²Only permitted if veranda, porch, deck or balcony, is fully
open on a minimum of two sides beneath the floor.*

Hearthstone Quality Home Heating Products, Inc STOWE Model 8325
13
Figure 13 - Venting Termination Diagram

Hearthstone Quality Home Heating Products, Inc STOWE Model 8325
14
ELECTRICAL SYSTEM INFORMATION
CAUTION: LABEL ALL WIRES PRIOR TO DISCONNECTION WHEN SERVICING CONTROLS. WIRING ERRORS
CAN CAUSE IMPROPER AND DANGEROUS OPERATION. VERIFY PROPER OPERATION AFTER SERVICING.
(ATTENTION: AU MOMENT DE L’ENTRETIEN DES COMMANDES, ÉTIQUETEZ TOUS LES FILS AVANT LE
DÉBRANCHEMENT. DES ERREURS DE CÂBLAGE PEUVENT ENTRAÎUN FONCTIONNEMENT INADEQUATE ET
DANGEREUX.)
The proper location of wire connections is shown in the following figure.
Figure 14 –Stowe 8325 Wiring Diagram

Hearthstone Quality Home Heating Products, Inc. STOWE Model 8325
15
Gas Supply & Connections
Connection Location
The gas supply connection is made to the Stowe’s
gas control valve under the bottom right center of
the unit using a 3/8” male NPT fitting. The supply
line should be ½” diameter, or appropriately sized to
provide a sufficient gas supply to meet the maximum
demand of the unit without undue loss of pressure.
We recommend a flexible line to avoid undue
mechanical load on the valve and to ease thread
alignment, but refer to local codes.
The Stowe is factory equipped to use natural gas
(NG) and requires conversion for use with propane
(LP). A propane (LP) fuel conversion kit is included
with your stove purchase.
Gas Supply
This appliance and its individual shutoff valve must
be disconnected from the gas supply piping system
during any pressure testing of that system at test
pressures in excess of ½ psig. The Stowe must be
isolated from the gas supply piping system by
closing its individual manual shutoff valve during any
pressure testing of the gas supply piping system at
test pressures equal to or greater than ½ psig. Over
pressurizing can damage the control resulting in
leakage or control malfunction.
NOTICE: A QUALIFIED TECHNICIAN MUST
CONNECT THE HEATER TO THE GAS SUPPLY
AND LEAK TEST THE UNIT BEFORE IT IS
APPROVED FOR USE. CONSULT ALL CODES.
WARNING: THE UNIT MUST BE INSTALLED AND
CONNECTED IN ACCORDANCE WITH LOCAL
CODES, OR IN THE ABSENCE OF LOCAL CODES,
WITH THE MOST CURRENT EDITION OF THE
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
NFPA Code and Hearthstone require the use of
a dedicated sediment trap just upstream of the
unit. Damage to the valve, or other components
due to the lack of a sediment trap are not
covered by warranty (see figure 16).
High Altitude Installations
For high altitude installations consult the local gas
distributer or the authority having jurisdiction for
proper rating methods.
The decreased atmospheric pressure at higher
altitudes affects the heat value of fuel gases. Gas
suppliers typically derate the gas intended for use at
elevations above 2000 feet (610 meters). Refer to
the instructions in kit #95-56242 for NG high altitude
adjustment.
Figure 15 –SIT 820 Valve

Hearthstone Quality Home Heating Products, Inc. STOWE Model 8325
16
WARNINGS
•Fire or Explosion Hazard. Can cause property
damage, severe injury, or death. Do NOT bend
tubing at gas valve connection point after
compression fitting has been tightened. This
can result in gas leakage at the connection.
•Use new properly prepared pipe free from metal
or material chips. When tubing is used, assure
that ends are square, de-burred and clean. All
tubing bends must be smooth and free of
distortion.
•Do NOT over tighten connections.
Over tightening can damage the control body
resulting in leakage or control malfunction.
•Do NOT remove screws from the gas valve. Do
NOT adjust and/or alter any components
marked with tamper indicating paint. Motor
knob is not to be removed.
•Turn off gas supply at the appliance service
valve before starting installation, and perform a
Gas Leak Test after the installation is complete.
•Install the sediment trap (where required) in the
gas supply line to prevent contamination of the
gas valve (see figure 16).
•Use only your hand to push in or turn, the
gas Control knobs. Never use tools. If a
knob will not push in or turn by hand, do
NOT try to repair it. Call a qualified service
technician. Force or attempted repair will
void warranty and can result in a fire or
explosion.
GAS CONNECTIONS
Connection Main Gas (Tubing connections)
1. Do NOT use pipe joint compound or
Teflon®/PTFE tape.
2. Slip nut and ferrule over tubing.
3. Slide nut and ferrule into place, and insert
tubing into inlet/outlet connection until it
bottoms. Turn until finger-tight.
4. Use a wrench to tighten nut about 1 turn beyond
finger tight.
Connection Main Gas (Pipe Connections)
1. Do NOT use Teflon®/PTFE tape.
2. Pipe to be inserted into the valve must be the
proper thread length and to gauge. Thread
that IS cut too long can cause distortion or
malfunction if inserted too deeply.
3. Apply a moderate amount of approved
pipe\sealant to the pipe only, leaving the
two end threads bare.
1. Connect pipe to valve inlet and outlet.
Figure 16 –Sample Gas Supply Sediment Traps
PERFORM INITIAL GAS LEAK TEST
1. Check carefully for gas leaks immediately after
the appliance has been installed and the gas
turned on. Do this before attempting to operate
the appliance or other gas burning device.
1. Use an approved non-corrosive leak detection
fluid, or other approved leak detection method,
around the diaphragm flanges, pipe connections,
seal cap, and all other joints. Bubbles indicate a
leak.
2. If no leakage is detected, proceed with the
instructions listed on page 21 to light the main
burner and perform a secondary leak check of
the appliance gas supply system.
5. If a leak is detected, tighten pipe connections
(including adapters) according to "GAS
CONNECTIONS" (page 17).

Hearthstone Quality Home Heating Products, Inc. STOWE Model 8325
17
WARNING
Absolutely no leakage should occur, otherwise
there is a danger of fire or explosion depending
upon conditions. Never use if leakage is detected.
Log Set Placement
CAUTION: FRAGILE! HANDLE LOG SET WITH
CARE. ALWAYS WEAR GLOVES AND SAFETY
GOGGLES WHILE HANDLING THE LOG SET.
WARNING: FAILURE TO POSITION THE PARTS IN
ACCORDANCE WITH THESE DIAGRAMS OR
FAILURE TO USE ONLY PARTS SPECIFICALLY
APPROVED WITH THIS APPLIANCE MAY RESULT
IN PROPERTY DAMAGE OR PERSONAL INJURY.
AVERTISSEMENT. RISQUE DE DOMMAGES OU
DE BLESSURES SI LES PIÈCES NE SONT PAS
INSTALLÉES CONFORMÉMENT À CES SCHÉMAS
ET OU SI DES PIÈCES AUTRES QUE CELLES
SPÉCIFIQUEMENT APPROUVÉES AVEC CET
APPAREIL SONT UTILISÉES.
Place only the ceramic log set supplied with the unit
in the firebox. Do not place any other ceramic logs,
wood logs, or other materials in the firebox. If the
log set is damaged or broken contact your dealer for
replacement. The ceramic logs will last a long time;
however, they will break if subjected to rough or
improper handling. Exact positioning of the log set is
required in order to obtain a pleasing flame pattern
and efficient combustion. Incorrect log placement
may cause carbon build-up; excess thermal stress
on the log set and stove parts, reduced efficiency,
and high levels of carbon monoxide. Position the log
set exactly as shown in order to obtain a pleasing
flame pattern and efficient combustion. Incorrect log
placement can cause carbon build-up; excess
thermal stress on the log set and stove parts,
reduced efficiency, and high levels of carbon
monoxide. If the log set does not fit into the firebox
exactly as outlined, contact your dealer for
assistance.
INSTALLATION OF THE LOG SET
(Refer to the following images in this section for log
set assembly)
1. Remove the packaging material around the log
set assembly. Be careful not to damage the log
set when unpacking.
Figure 17 –Log Set Numbering
2. Place log 1 on support bracket as shown in
Figures 18 & 19.
Figure 18 –Log 1 Mounting Detail
Figure 19 –Log 1 in Position
3. Place Log 2 into the channel in the burner in
front of log 1 as shown in Figure 20.
1
2
3
4
5