HearthStone Bennington 8350 User manual

Bennington Model: 8350
Manual: 6400-4041
Revised: 7/28/2011
Bennington
(Model 8350)
Woodstove
OWNER'S MANUAL
INSTALLATION & OPERATING
INSTRUCTIONS
READ THIS ENTIRE OWNER’S MANUAL BEFORE YOU INSTALL AND USE YOUR NEW
BENNINGTON WOOD STOVE.
To reduce the risk of fire, follow the installation instructions. Failure to follow these
instructions may result in property damage, bodily injury, or even death.
SAVE THESE INSTRUCTIONS FOR FUTURE REFERENCE!
CONTACT LOCAL AUTHORITIES HAVING JURISDICTION (BUILDING DEPARTMENT or
FIRE OFFICIALS) ABOUT PERMITS REQUIRED, RESTRICTIONS, AND INSTALLATION
INSPECTION IN YOUR AREA.

Hearthstone Quality Home Heating Products Inc ® Bennington Model 8350
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Hearthstone Quality Home Heating Products Inc ® Bennington Model 8350
Table of Contents
INTRODUCTION..................................................................................................................... 1
CODES .................................................................................................................................................................2
SAFETY INFORMATION ...........................................................................................................................................2
PERIODIC CHECKLIST ............................................................................................................................................3
SPECIFICATIONS ..................................................................................................................4
INSTALLATION...................................................................................................................... 6
UNPACKING...........................................................................................................................................................6
INSTALLING YOUR STOVE ......................................................................................................................................6
HEARTH REQUIREMENTS AND FLOOR PROTECTION ................................................................................................6
FABRICATING A HOMEMADE FLOOR PROTECTOR.....................................................................................................7
OUTSIDE AIR SUPPLY............................................................................................................................................7
VENTING COMPONENTS AND CONFIGURATION............................................................ 11
CONNECTING YOUR WOOD STOVE.......................................................................................................................12
INSTALLING IN AMOBILE HOME............................................................................................................................15
OPERATION......................................................................................................................... 16
CONTROLS AND FEATURES..................................................................................................................................16
CHOOSING FIREWOOD.........................................................................................................................................17
BUILDING AFIRE.................................................................................................................................................18
BREAKING IN YOUR WOOD STOVE .......................................................................................................................18
MAINTENANCE................................................................................................................................................20
TROUBLESHOOTING......................................................................................................................................22
TROUBLESHOOTING GUIDE ..................................................................................................................................24
REPLACEMENT PARTS &OPTIONAL ACCESSORIES................................................................................................25
SAFETY &RATING LABEL.....................................................................................................................................26
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Hearthstone Quality Home Heating Products Inc ® Bennington Model 8350
Introduction
Congratulations! You have just invested in a most
unique wood burning stove – the Bennington Wood
Burning Stove from Hearthstone Quality Home
Heating Products Inc®. The Bennington Model -
8350 is a clean burning EPA certified, non-catalytic
wood burning stove. At 2.5 cubic feet capacity and
3.5 grams per hour particulate emissions you can be
proud to join the Hearthstone family with our Premier
Cast Iron Wood Burning Stove. The generous
firebox depth allows for loading of wood through the
front door up to 19 inches long, and the side door
allows for wood up to 22 inches long!
Unlike most Cast Iron Wood Stoves, your
Bennington Wood Stove is a convective stove with
the outer walls separated from the firebox by an air
space. You will get “convective” air currents through
your stove, which reduces surface temperatures
while providing more heat. The Bennington is the
only cast iron, convective heater with a 12-pound
cast iron heat exchanger.
Your purchase ensures years of clean, comfortable
heat with minimal maintenance. You will receive the
benefits of the most advanced technology in wood
burning without the cost and maintenance
requirements of a catalytic stove. The Bennington
blends modern technology with the unique beauty of
cast iron. We trust that you will appreciate the
quality of our handcrafted product.
Please read this manual in its entirety. Its purpose
is to familiarize you with your stove's safe
installation, proper break-in, operation and
maintenance. It contains information that will be
useful to you now and in years to come, so keep it
handy and refer to it as needed.
Use these instructions as well as national, state, and
local building codes to install your stove. Be sure to
maintain the designated stovepipe and stove
clearances to walls, ceilings, hearth, and other
combustible surfaces. This will help reduce the risk
of fire. Failure to follow these instructions can result
in property damage, bodily injury, and even death.
Locate your stove in a safe, convenient, open area;
away from traffic flow, doors, and hallways; and near
a chimney and chimney connector. Review the
proper clearance measurements from combustible
surfaces. You can safely reduce required clearances
in most cases with a special connector pipe and
special wall coverings as specified by this manual,
the NFPA 211 codes, and your local authorities
having jurisdiction.
Keep furniture, drapes, curtains, wood, paper, and
other combustibles far away from the stove. Never
install the stove in a location where gasoline,
kerosene, charcoal lighter fluid or other flammable
liquids are used or stored.
Locate the stove centrally in your living area to allow
the heat to travel naturally to distant rooms. We
recommend that you do not locate your stove in an
uninsulated basement. The amount of radiant
energy required to heat concrete basement walls is
so great that most of the usable heat is absorbed by
them and lost.
SAFETY NOTICE: A HOUSE FIRE MAY RESULT IF
THIS STOVE IS NOT INSTALLED PROPERLY.
FOR YOUR SAFETY, CAREFULLY FOLLOW THE
INSTALLATION DIRECTIONS. CONTACT LOCAL
BUILDING OR FIRE OFFICIALS ABOUT
RESTRICTIONS AND INSTALLATION INSPECTION
IN YOUR AREA.
The performance of your stove depends on many
variables. Since all installations are unique, the
general information and operating procedures
presented here can only serve as useful guidelines
rather than hard and fast rules. Should you have
any questions, do not hesitate to contact your dealer
for additional information.
Validate your warranty - return your warranty
registration card to Hearthstone within 30 days of
purchase. Once your warranty is validated by
returning your warranty card, contact your dealer for
any necessary warranty service.
This stove is manufactured and warranted by:
Hearthstone Quality Home Heating Products
Inc®
317 Stafford Ave.
Morrisville, VT. 05661
www.hearthstonestoves.com
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Hearthstone Quality Home Heating Products Inc ® Bennington Model 8350
CODES
When you install your Bennington wood stove, it is
imperative that you adhere to all local codes, which
can be obtained from either of the following two
National sources:
American National Standards Institute, Inc. (ANSI)
1430 Broadway
New York, NY 10018
National Fire Protection Association, Inc. (NFPA)
Battery March Park
Quincy, MA 02269
If you are installing your Bennington in a mobile
home, follow the guidelines described in the
Manufactured Home Construction and Safety
Standard, Title 24 CFR, Part 3280 (United States).
SAFETY INFORMATION
Read and understand this Owner's Manual
thoroughly before installing and using this
stove.
Ensure you install your stove:
According to the manufacturer's
recommendations.
In accordance with all applicable codes.
With the proper sized chimney.
When using your stove:
Warn children and others unfamiliar with
woodstoves of the danger of touching hot,
radiating surfaces of your stove. For your
additional safety, obtain hearth and stove guards
through your local dealer.
Follow recommended break-in procedure as
outlined in this manual.
Burn natural wood only. Higher efficiencies and
lower emissions result when burning air-dried,
seasoned wood, as compared to green or
freshly cut wood.
Use caution when loading firewood into a hot
stove.
Keep the side and front doors closed at all times
except when loading wood.
Keep the ash pan tray fully inserted and the ash
door closed tightly.
Inspect the stovepipe, chimney connector and
chimney, as recommended.
Ensure the removable ash lip is in place while
using the stove. If the ash lip is not installed
properly, the hearth surface may exceed safe
temperatures.
Follow these safety precautions:
Never modify this stove in any way, especially
the primary air control system.
Never burn kiln dried wood, painted or treated
wood, solvents, trash, plywood, colored or
glossy paper, artificial logs, cardboard, coal,
garbage or driftwood. Especially, do not burn
coal in this stove.
Never use gasoline type fuel, kerosene,
charcoal lighter fluid, or other liquid fuels or solid
fire starters to start or invigorate the fire. These
fuels can possibly generate carbon monoxide
that can sap the supply of oxygen. Keep all
such materials away from the stove.
Never use the stove if the ash pan door is open,
damaged, or not in place, or not sealing.
Never use a wood grate or other device to
elevate the fire.
Do Not allow logs to rest against or otherwise
come in contact with the glass when the door is
closed.
Do Not slam the door or use the door to force
wood in to the stove.
Never over-fire your stove. (See page 19)
Never put articles of clothing or candles on a hot
stove.
Do Not connect the stove to a flue that is
serving another appliance. (See page 11)
Other safety guidelines
Keep all combustible items such as furniture,
drapes, clothing, and other items, at least 36"
(0.92 m) from the stove (See page 8)
Install a smoke detector, preferably in an area
away from your wood stove.
Keep a fire extinguisher handy. We recommend
the type rated "A B C."
Dispose of ashes properly. (See page 20)
Keep children and pets away from the stove;
they could be burned by touching a hot stove.
Clean your chimney system as needed. (See
page 20)
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Hearthstone Quality Home Heating Products Inc ® Bennington Model 8350
3
PERIODIC CHECKLIST
Perform each of these tasks at the specified
intervals.
At the End of Every Week:
Empty ashes from the firebox and ash pan,
sooner if the firebox or the ash pan begin to fill
up.
At the Beginning of Every Other Month:
A visual inspection of the chimney connector
and chimney for creosote is recommended
depending upon your use of the stove. (Please
see page 17-Creosote Formation and Need For
Removal)
Check door seals using the "dollar bill test." -
When the fire is out and the stove is cool, shut
the door on a dollar bill. If the bill pulls out
without any resistance, then your stove’s door
isn't sealed properly. To tighten the seal,
change the door gasket. (Refer to page 17 –
Gaskets)
At the End of Every Season:
Dismantle the chimney connector and clean it
thoroughly. Replace any pieces that show signs
of rust or deterioration.
Inspect and, if necessary, clean your chimney.
Thoroughly clean out the inside of the stove.
Inspect all door gasket material and replace if
worn, frayed, cracked or extremely hard.
EMERGENCY PROCEDURES
If you have a stovepipe or chimney fire, follow these
instructions:
1. If the fire is too threatening, leave the area and
call the fire department immediately! If not,
perform the next three steps.
2. Close the primary air control.
3. Close the stovepipe damper (if present).
4. Keep the stove front, side and ash doors closed!
WARNING: DO NOT ATTEMPT TO PUT OUT A
STOVEPIPE OR CHIMNEY FIRE BY THROWING
WATER ONTO THE STOVE, STOVEPIPE, OR
CHIMNEY. THE EXTREMELY HIGH
TEMPERATURE ASSOCIATED WITH SUCH FIRES
CAN CAUSE INSTANTANEOUS STEAM AND
SERIOUS BODILY HARM.
Once the chimney fire has expired, leave the primary
air control closed and let the fire in the stove die out
completely. The stove should not be fired again until
the stove, stovepipe, and chimney are all thoroughly
inspected for any sign of damage. You must correct
any damage before using your stove again.
WARNING: THIS STOVE IS ASSEMBLED WITH A
CERAMIC BAFFLE LOCATED DIRECTLY ABOVE
THE FIREBOX. THIS MATERIAL IS EXTREMELY
DURABLE, AND WILL LAST FOR YEARS IF
PROPER ATTENTION IS GIVEN TO IT. MAKE
SURE TO BE CAREFUL WHEN LOADING WOOD
INTO THE STOVE. DO NOT ALLOW WOOD TO
LIFT UP BETWEEN THE AIR PIPES AND DAMAGE
OR FRACTURE THE CERAMIC BAFFLE. THIS
BAFFLE IS IMPORTANT TO THE PERFORMANCE
OF THE UNIT.
HEARTHSTONE’S THERMO-CERAMIC BAFFLE
SYSTEM
To enhance the combustion efficiency and reduce
the emissions of the fire in your stove Hearthstone
has developed an advanced THERMO-CERAMIC
baffle system. This system uses a lightweight,
durable ceramic material above the burner tubes to
maintain the high temperatures in the secondary
combustion area and maintain the low emission –
high efficiency combustion you desire. This new
technology will not corrode, rust dissolve or lose its
strength, however it is vulnerable to puncture or
cracking due to rough handling.
Please exercise care when loading wood or
cleaning your stove, not to damage the
thermo-ceramic baffle
Located directly above the burner tubes in the
firebox, this white sheet of material will break if wood
or cleaning brushes impact it. Be careful when
loading and cleaning your stove to not break this
material. If this piece has been fractured or a hole is
punctured, it will cause the stove to function
improperly. You must replace the board through a
qualified HearthStone dealer.

Hearthstone Quality Home Heating Products Inc ® Bennington Model 8350
Specifications
Heat Output: 70,000 BTUs maximum per
hour of cordwood (based on
independent laboratory test
results).
Size Of Heated Area: Up to 2,000 square feet.
Firebox Capacity: 2.5 cubic feet (.071 cubic
meters) or 50 pounds of
wood (The amount and
weight of wood contained
per cubic foot of firebox
volume can vary from 15 to
36 lbs. per cubic foot
depending on type of wood,
moisture content, packing
density and other factors.
As a constant for
comparison and test
purposes, we are assuming
20 lbs. of seasoned
hardwood per cubic foot of
firebox volume).
Maximum Log Length.19" (501 mm) - front door
22" (571 mm) - side door
Height 29-3/8" (74.6 cm)
Width 30-1/4" (76.8 cm)
Depth 22-1/8" (56.2 cm)
Front Door Size 19-3/4" wide x 11-3/4" high
(501 x 298 mm)
Side Door Size 8" wide x 9" high 8" x 12"
(203 x 228 mm)
Stovepipe Size 6" (152 mm) diameter
Metal Chimney 6" (152 mm) inside diameter
Masonry Chimney 8" x 8" (203 x 203 mm)
(square flue)
Flue Exit Top or Rear Exit 90
Actual Weight 440 pounds
Optional Equipment. Outside Air Adapter, Blower
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Hearthstone Quality Home Heating Products Inc ® Bennington Model 8350
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Hearthstone Quality Home Heating Products Inc ® Bennington Model 8350
Installation
UNPACKING
Hearthstone Stoves packages your Bennington
stove with the greatest care so that it ships safely.
Under certain circumstances, however, damage can
occur during transit and handling. When you receive
your stove, unpack it carefully and inspect your
stove and all parts for damage. Also, make sure
that all parts are included in the box. If any parts are
damaged or missing, please contact your dealer
immediately.
INSTALLING YOUR STOVE
First you must decide where your stove will reside.
After choosing an appropriate spot, inspect this
location to make sure that the stove will have
enough clearance to combustible materials that
would surround the stove. These combustibles
include walls, floor, ceiling, fireplace, and chimney.
You must carefully consider the clearances to all of
these combustibles before actually connecting your
stove. When considering these clearances, also
decide the kind of floor the stove will rest on.
Depending on your floor, you can install your stove
as it is, or use a floor protector.
Use this section to plan how to locate your stove in
your particular location. Consider both the
clearances of the stovepipe and the stove itself to
the surrounding combustibles.
Read this chapter to obtain a sound understanding
of how to properly install your stove.
CLEARANCES TO NFPA 211 PROTECTED
SURFACES
You can reduce the clearances to combustible
surfaces by using any National Fire Protection
Agency (NFPA) approved wall protection system.
Please refer to NFPA 211 for specifications and
complete details.
You can obtain this information directly from NFPA.
National Fire Protection Agency
Batterymarch Park
Quincy, MA 02269
1-800-344-3555
1-617-770-3000
HEARTH REQUIREMENTS AND FLOOR
PROTECTION
Install your stove on one of the following:
A *non-combustible floor, such as a slab,
cement, or stone hearth. (A noncombustible
floor will not ignite, burn, support combustion, or
release flammable vapors when subjected to fire
or the anticipated heat from your stove.) *An
example of a non-combustible floor protector
would be a hearth constructed with a continuous
layer of a listed backer board (such as Wonder-
Board or Durock) used for ember protection with
a tile, brick, slate, or another noon-combustible
facing.
A floor protector that you obtain from your
dealer. A floor protector is any noncombustible
surface laid on the floor underneath the stove
that extends, 16 inches -US (46 cm -CA) beyond
the front door, 16 inches -US (46 cm -CA)
beyond the side door, and 8 inches (20 cm)
beyond each side of the fuel loading and ash
removal opening(s). For placement of the
Bennington on carpeting, vinyl tile or other
combustible materials, the unit must be installed
on a non-combustible material extending the full
width and depth of the unit. Installation must
meet local codes.
NOTE: When using a double-wall chimney
connector, the floor protection in front of the
glass doors must have a minimum insulative
R-value of 0.9 (English units)or a composite
(homemade) floor protector with an R-value
of 0.9 or more.
Listed floor protectors come with various types of
specifications. To convert a floor protector’s
specifications to an R-value, do one of the following:
If the R-value is given, use that value – no
conversion is needed.
If a K-factor is given with a required thickness
(T) in inches, use this formula: R-value = 1/K x
T
If a C-factor is given, use the formula: R-value =
1/C
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Hearthstone Quality Home Heating Products Inc ® Bennington Model 8350
For horizontal chimney connector installations, the
floor protection must be installed beneath the
connector and 2” beyond each side.
To determine the R-value of the proposed alternate
floor protector:
Use either the K-factor or the C-factor formula
explained above to convert specifications not
expressed as R-values.
For multiple layers of floor protectors, simply add
the R-values of each layer to determine the
overall R-value.
If the overall R-value of your setup is greater than
the R-value of the specified floor protector, then your
setup is acceptable.
FABRICATING A HOMEMADE FLOOR
PROTECTOR
You can make your own floor protector by stacking
together noncombustible materials from the
following table. Simply add together the listed R-
values to attain the necessary requirements for
installing your stove.
The hearth pad or floor protector for the stove must
have minimum dimensions of 39" x 48" -US (107cm
x 127 cm-CA) and must be placed as illustrated
above. It must extend, 16 inches -US (46 cm -CA)
beyond the front door, 16 inches -US (46 cm -CA)
beyond the side door, and 8 inches (20 cm) beyond
each side of the fuel loading and ash removal
opening(s).
To fabricate a floor protector for a wood floor with an
R-value of at least 0.9, consider the following
examples:
¼” mineral wool insulation 0.78
½” plaster board 0.45
Total R-value 1.23
½” Wonderboard 0.20
4” solid clay brick 0.80
Total R-value 1.00
Noncombustible Material Thickness R-value
Gypsum or plaster board1 ½” 0.45
Wallboard, Wonderboard,
or Durock1 ½” 0.20
Ceramic board (Fiberfrax
or Micor)1 ½” 1.10
Nominal solid clay brick1 1” 0.20
Ceramic wall or floor tile1 ¼” 0.01
Mineral wool insulation2 1” 3.12
Cement mortar2 1” 0.20
Horizontal still air2* 1/8” 0.92
*Note: You cannot “stack” horizontal still air to
accumulate R-values; you must separate each layer
of the horizontal still air with another noncombustible
material
1According to Intertek Testing Services, Inc.
2According to ASHRAE Handbook of Fundamentals 1977
OUTSIDE AIR SUPPLY
You can connect an outside air source directly to
this stove using an outside air adaptor. The
advantage of providing outside air directly to the
stove is that the air used by the stove for combustion
is taken from outside of the residence rather than
from within the room where the stove is located.
With outside air supplied directly to the stove, drafts
within the room and air infiltration within the building
are reduced. Use of the outside air adaptor may
also improve stove performance in a particularly
airtight house. The outside air adaptor for this stove
allows for the direct connection of the stove's air
intake to a minimum 3" (76 mm) diameter duct
(supplied by others) which leads to the outside of the
house.
When considering placement of the duct from the
outside of the house to the hearth, keep in mind the
need to avoid structural members of the house. See
illustration for all connection options. Choose which
is most convenient.
Locate the termination of the duct on the outside
wall of the house in such a manner as to preclude
the possibility of obstruction by snow, leaves or
other material. Screened the opening against
animals and insects.
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Hearthstone Quality Home Heating Products Inc ® Bennington Model 8350
8
SIDE
VIEW FRONT VIEW
ALCOVE CLEARANCE TO COMBUSTIBLES
REAR
VIEW VIEW
SIDE
CLEARANCES TO COMBUSTIBLES
PARALLEL CORNER
STOVE CLEARANCE TO COMBUSTIBLES
* * * * * * * * You must follow minimum clearances for the
Bennington stove to combustibles such as walls and
ceilings. You may reduce the general clearances if
installing the stove near Protected Surfaces (see
”CLEARANCES TO NFPA 211 PROTECTED
SURFACES” below and following diagrams).
Please use this section to plan the layout for
your stove. Consider clearance of pipe to
combustibles and stove to combustibles.
More specifics on installation follow.
* * * * * * * *
FREESTANDING MINIMUM CLEARANCES TO COMBUSTIBLES (from closest point of stove)
Unprotected Surfaces Protected Surfaces (NFPA 211)
Parallel Corner Parallel Corner
Installation type Side Rear Side Rear
single wall connector
.
* R=18 in. (381
mm) 18 in. 13 in. 6 in. 9 in. 7 in.
L=12 in. (305 mm
)
(460 mm) (330 mm) (150 mm) (230-mm) (180-mm)
double wall
connector. * R=18 in. (381
mm) 16 in. 12 in. 6 in. 9 in. 7 in.
L=12 in. (305 mm
)
(405-mm) (305-mm) (150 mm) (230-mm) (180-mm)

Hearthstone Quality Home Heating Products Inc ® Bennington Model 8350
ALLOWABLE ALCOVE DIMENSIONS
Unprotected Surfaces Protected Surfaces (NFPA 211)
Min.
Width Max. Depth
Min. Height
(stove to ceiling
above.) Min. Width Max. Depth Min. Height (stove to ceiling above.)
58 in. 38 in. 48 in. 43 in. 48-in. 24 in.
(1475
mm) (965 mm) (1220 mm) (1090 mm) (1220 mm) (610 mm)
*With Kit #93-70500(Side Door Lock Kit) left side clearances can be used for the right side.
CLEARANCES FROM STOVEPIPE (Chimney Connector)
MINIMUM CLEARANCE TO COMBUSTIBLES (from Chimney Connector)
Connector type Unprotected Surfaces Protected Surfaces (NFPA 211)
Single wall connector pipe 16-in. 6-in.
380-mm 150-mm
Double wall connector pipe 14-in. 6-in. **
(**SEE Manuf. Specs.) 205-mm 150-mm **
DO NOT CONNECT THIS UNIT TO A CHIMNEY
FLUE SERVING ANOTHER APPLIANCE
Single wall connector is 24 MSG or 25 MSG
blued steel stovepipe.
Double wall connector (close clearance pipe)
which must be used with a listed factory-built
“Type HT" chimney and may also be used with a
masonry chimney to reduce clearances, is
available from several manufacturers, your dealer
can help you choose. Some air insulated
connector pipe models available are Simpson
Dura Vent DVL and Metalbestos DS. Security,
GSW and Ameritec also have acceptable close
clearance connector pipe.
When used in a mobile home, a spark arrester is
required. (See page 15)
Chimney connector shall not pass through floor
or ceiling, nor any attic or roof space, closet or
similar concealed space. Where passage
through a wall or partition of combustible
construction is desired, the installation shall
conform to NFPA 211 or CAN/CSA - B365.
It is very important to follow minimum clearances
for chimney connectors to combustibles such as
walls and ceilings when installing the stove near
non-combustible surfaces. Typical chimney
connector clearances are outlined below. The
single wall
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Hearthstone Quality Home Heating Products Inc ® Bennington Model 8350
clearances are generic; the Double wall
clearances are for Simpson Dura Vent DVL,
CHECK THE SPECIFICATIONS FROM THE
MANUFACTURER OF YOUR CONNECTOR.
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Hearthstone Quality Home Heating Products Inc ® Bennington Model 8350
Venting Components and Configuration
COMPONENTS OF A VENTING SYSTEM
The complete venting system consists of several
components: chimney connector, wall thimble, wall
pass-through, chimney, and liner. It is absolutely
necessary that you install all of these components
within the clearances to combustibles discussed
earlier to install your stove safely.
To protect against the possibility of a house fire, you
must properly install and constantly maintain the
venting system. Upon inspection, immediately
replace rusted, cracked, or broken components.
The chimney connector is the stovepipe from the
woodstove to the chimney. The chimney
connector stovepipe must be 6" (152 mm)
diameter, 24 MSG or 25 MSG blued steel
connector pipe. Do not use aluminum or
galvanized steel pipe - they cannot withstand the
extreme temperatures of a wood fire.
A thimble is a manufactured (or site-constructed)
device installed in combustible walls through
which the chimney connector passes to the
chimney. It keeps the walls from igniting. You
must use a wall thimble when installing a
chimney connector through a combustible wall
to the chimney.
A wall pass-through (or chimney support
package) also keeps the walls from igniting.
You must use one when connecting through a
wall or ceiling to a prefabricated chimney.
Only install this stove to a lined masonry
chimney or an approved high temperature
prefabricated residential type building heating
appliance chimney. Do not connect this stove to
a chimney serving another appliance; you will
compromise the safe operation of both the wood
stove and the connected appliance.
▌WARNING:
DO NOT CONNECT THIS APPLIANCE TO
ANY AIR DISTRIBUTION DUCT OR SYSTEM.
A liner is the UL 1777 or ULC S635 (for factory
built fireplace or masonry) chimney.
You must connect your stove to a chimney
comparable to those recommended in this manual.
Do not use stovepipe as a chimney. Use stovepipe
for freestanding installations only to connect the
stove to a proper chimney.
INSTALLING A VENTING SYSTEM
Stovepipe sections must be attached to the stove
and to each other with the crimped end toward the
stove. If creosote builds up, this allows the creosote
to run into the stove and not the outside of the
stovepipe and onto the stove.
Secure all joints, including attaching the stovepipe to
the stove's flue collar, with three sheet metal screws.
Install #10 x 1/2" (3 mm x 13 mm) sheet metal
screws into the holes pre-drilled in the flue collar.
Leaving off the screws can cause joints to separate
from the vibration that results from a creosote
chimney fire.
You can simplify connecting stovepipe by using
additional accessories such as telescoping pipes,
slip-connectors or clean-out tees. These
accessories ease the inspection of your chimney, as
well as allow you to easily dismantle the stovepipe
(without moving the stove) when you periodically
inspection the stovepipe connection and chimney.
Install the stove as close as practical to the chimney,
while maintaining all proper clearances. Install
stovepipe that is as short and as straight as
possible. Horizontal runs of stovepipe should
always rise away from the stove a minimum of 1/4"
per foot (21mm/m).
Long runs of stovepipe to increase heat dispersal
are not recommended. Using longer lengths of
stovepipe or more connecting elbows than
necessary increase the chances of draft resistance
and the accumulation of creosote buildup.
In general, you do not need to install a stovepipe
damper with the Bennington. Some installations,
however, could benefit from a stovepipe damper,
such as a tall chimney which can create a higher
than normal draft. In such cases, a damper can help
regulate the draft. The Bennington requires a draft
between 0.06" wc and 0.1" wc. For drafts above
0.1" wc, install a stovepipe damper.
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Hearthstone Quality Home Heating Products Inc ® Bennington Model 8350
12
Remember, the NFPA has
recommended, minimum
clearances for chimney
connectors to combustibles
such as walls and ceilings.
Once the stove is installed at
safe distances from these
combustible surfaces, it is
important to maintain these
connector clearances for the
remainder of the installation.
CONNECTING YOUR
WOOD STOVE
You can install your
Bennington to a prefabricated
metal chimney or a masonry
chimney.
CONNECTING TO A
PREFABRICATED METAL
CHIMNEY
When connecting the
Bennington to a prefabricated
metal chimney, you must
follow, precisely, the
manufacturer's installation
instructions. Use only Type
HT (2100 deg. F),
prefabricated metal chimneys
listed per UL 103 or ULC
S629 standards.
▌WARNING:
DO NOT CONNECT THE STOVE TO A
CHIMNEY FLUE SERVING ANOTHER
APPLIANCE.
Make sure the size of the chimney’s flue is
appropriate for the Bennington. The Bennington
requires a 6" (152 mm) inside diameter flue for new
installations. A 6” diameter flue provides adequate
draft and performance. You can use an 8" (203 mm)
diameter existing flue with a reducer. An oversized
flue contributes to creosote accumulation. (In this
case, bigger is NOT better.)
When purchasing a prefabricated chimney to install
with your stove, be sure to also purchase from the
same manufacturer the wall pass-through (or ceiling
support package), "T" section package, fire-stops
(when needed), insulation shield, roof flashing,
chimney cap, and any other needed accessories.
Follow the manufacturer’s instructions when
Chimney is supported by Tee Support Bracket.
Tee Support Bracket
Tee clean-out
Adjustable Roof
Wall Strap
Chase Enclosure
Chimney Sections
Flashing
Storm Collar
Chimnet Cap
Chimney through outer wall with enclosed chase.
Starter section
Collar with built-in
Support Box and Trim
Two story house installation with attic.
Firesafe Enclosure
Firestop Radiation
Adjustable Roof
Chimney Cap
Wall Thimble
Tee
Stovepipe
Attic Insulation Shield
Chimney Sections
Twist-Lock
Support Bracket
Extended Roof
not included)
(Conduit
Flashing
Storm Collar
or other Lined Masonry Chimney
Tee
Chimney pipe through Clay tile
section
Adjustable Roof
Flashing
Storm Collar
Chimnet Cap
Chimney is supported by Ceiling.
Starter
with built-in
Support Box
One story house installation with attic.
Access door
other Liner
Clay tile or
Shield
Wall Thimble
Access door
Stovepipe
Shield
Insullation
Masonry Chimney
Chimney Sections
Tee clean-out
Adjustable Roof
Flashing
Storm Collar
Chimnet Cap

Hearthstone Quality Home Heating Products Inc ® Bennington Model 8350
installing the chimney and accessories. In addition,
be sure to maintain all manufacturers’
recommendations for the proper clearances to the
chimney.
There are basically two ways to install a
prefabricated metal chimney:
An interior installation where the chimney
passes inside the residence through the ceiling
and roof.
An exterior installation where the chimney
passes through the wall behind the stove
then up the outside of the residence.
Whenever possible, choose an interior chimney. An
interior chimney heats up more quickly and retains
its heat; thus promotes a better draft and
discourages the formation of creosote. An exterior
chimney does not benefit from the warmth of being
surrounded by the building, so it typically operates at
lower flue temperatures than an interior chimney.
An exterior chimney’s draft is not as strong and may
experience increased creosote accumulation.
CONNECTION TO AMASONRY CHIMNEY
Consider two primary elements when connecting
your stove to a masonry chimney: the chimney itself
and the thimble where the stovepipe connects to the
chimney.
Use only Code approved masonry chimneys with a
flue liner. Before connecting to a masonry chimney,
hire a professional to examine the chimney for
cracks, loose mortar, and other signs of deterioration
and blockage. If the chimney needs repair,
complete them before installing and using your
stove. Do not install your stove until the chimney is
safe for use.
Make sure the chimney’s cleanout is complete and
working properly. To avoid a loss of draft, the
cleanout must close off completely. If allowed to
cool, your stove will perform poorly and creosote will
build up in the chimney.
Make sure the size of the chimney’s flue is
appropriate for this stove and that it is not too large.
Use a masonry chimney with a maximum of 8" x 8"
(203 mm x 203 mm) tile size for best results. An
oversized flue will contribute to the accumulation of
creosote.
Use the following checklist to ensure that your
masonry chimney meets these minimum
requirements:
Chimney wall construction:
Brick or modular block at least 4" (102 mm)
thick.
A rubble or stone wall.
Flue liner:
Minimum thickness of 5/8" (16 mm).
Installed with refractory mortar.
At least 1" (25 mm) air space.
An equivalent flue liner must be a listed chimney
liner system meeting type HT requirements or
other approved material.
Interior chimney requirements:
At least 2" (51 mm) clearance to combustible
structure
Fire stops must be installed at the spaces where
the chimney passes through floors and/or
ceiling.
Insulation must be 2" (51 mm) from the chimney.
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Hearthstone Quality Home Heating Products Inc ® Bennington Model 8350
14
Exterior chimney requirements:
At least 1" (25 mm) clearance to combustible
structure.
Chimney height requirements: (See Illustration)
At least 3 feet (0.9 m) higher than the highest
part of the roof opening through which it passes.
At least 2 feet (0.6 m) higher than any part of the
roof within 10 feet (3 m) measured horizontally
from the top of the chimney.
We recommend a minimum chimney height of 13
feet (4 m). The maximum allowable chimney height
is 30 feet (9m).

Hearthstone Quality Home Heating Products Inc ® Bennington Model 8350
INSTALLING IN AMOBILE HOME
Follow these special requirements for installing your
stove in a mobile home.
Install the stove in accordance with 24 CFR,
Part 3280 (HUD)
Permanently attach the stove to your mobile
home’s floor. Use 1/4" holes in each leg base to
bolt down the stove.
Install one of the following Dura-Vent Mobile
Home Chimney & Connector Kits:
6DP-MH 6” Diameter S/N 9096N
7DP-MH 7” Diameter S/N 9196N
8DP-MH 8” Diameter S/N 9296N
Each kit includes:
Stainless spark arrester cap, storm collar,
Adjustable vented flashing – 0/12 – 6/12,
Two 24” Dura/Plus* chimney pipes, 24”
support box with built-in starter section and
trim.
* (UL or ULC approved equipment is
acceptable)
Chimney must be removed when transporting
Mobile Home.
WARNING: DO NOT INSTALL IN A SLEEPING
ROOM
CAUTION: MAINTAIN THE STRUCTURAL
INTEGRITY OF THE MOBILE HOME WALLS,
FLOOR, CEILING, AND ROOF WHILE YOUR
STOVE IS INSTALLED AND IN USE.
Adjustable Roof
Flashing
Storm Collar
Chimney Cap
Chimney is supported by Ceiling.
Starter section
with built-in
Support Box
Typical Mobile Home Installation.
Stovepipe
Chimney Section
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Hearthstone Quality Home Heating Products Inc ® Bennington Model 8350
Operation
Once your Bennington is set in place, connected,
and assembled, you are ready to light a fire.
Hearthstone tests each woodstove before we ship,
so you should be able to easily light your first fire.
You may, however, have to make a few small
adjustments to compensate for altitude and other
factors particular to your installation.
WARNING: HOT WHILE IN OPERATION. KEEP
CHILDREN, CLOTHING AND FURNITURE AWAY.
CONTACT MAY CAUSE SKIN BURNS.
Please read this entire chapter before lighting your
first fire. It explains the controls and features of your
wood stove, how to choose firewood, and how to
break-in your stove and use it on a daily basis.
CONTROLS AND FEATURES
Before lighting any fires, become familiar with the
location and operation of your stove's controls and
features and learn how to use them. For your own
safety, do not modify these features in any way.
REMOVABLE FRONT DOOR HANDLE:The front
doors allow you to load wood into your stove; the
removable handle allows you to operate the front
doors, latch them closed, then remove so the handle
does not become warm while the stove is in use. To
open the doors, lift the handle to the 2 o’clock
position and pull the door. To latch the doors, push
the left door closed first, then close the right door
tightly and lower the handle to the 4 o’clock
position. Pull on the door handle to make sure it is
properly latched, then remove the handle. Your
handle can be stored to the left of the ash door in
the provided holder
SIDE DOOR HANDLE:The side door allows you to
load wood into your stove; a fixed handle allows you
to operate the side door and latch the door closed.
To open the door, lift the handle to the 12 o’clock
position and pull the door. To latch the door, push
the door closed tightly then lower the handle to the 3
o’clock position. Pull on the door to make sure it is
properly latched.
PRIMARY AIR CONTROL: This feature is located
in the front lower right of the stove. The primary air
control allows you to regulate the amount of air
entering the firebox. Generally speaking, the more
air allowed into the firebox, the faster and hotter the
rate of burn; conversely, less air creates a slower
burn. Push the lever down to open the primary air
control; push the lever up to close the primary air
control.
ASH PAN:The ash pan is located under the ash
lip. The ash pan collects burned ash from a fire and
allows you to conveniently remove the ash from your
wood stove. The ash pan is easy to remove. While
the stove is cool, sift the ashes across the grate into
the ash pan then rotate the ash door handle counter-
clockwise and pull to open. Remove the ash pan by
sliding it out carefully. After you have disposed of
the ashes, push the ash pan all the way into the
stove and close the ash door.
Do not operate the stove unless the ASH
PAN is inserted into the stove and the ash
door is closed. This could overheat and
damage the stove.
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Hearthstone Quality Home Heating Products Inc ® Bennington Model 8350
CHOOSING FIREWOOD
Your Bennington Woodstove is designed to only
burn firewood - also known as cordwood.
CAUTION: DO NOT USE CHEMICALS OR
FLAMMABLE FLUIDS SUCH AS GASOLINE,
NAPHTHA, KEROSENE, CHARCOAL LIGHTER
FLUID OR ENGINE OIL TO START A FIRE. DO
NOT USE CHARCOAL, PELLETS, COAL,
ARTIFICIAL LOGS OR ANY OTHER MATERIALS
AS FUEL; THEY ARE NOT SAFE. DO NOT BURN
GARBAGE.
The quality of your firewood directly affects heat
output, duration of burn and performance of your
stove. Softwoods generally burn hotter and faster,
while hardwoods burn longer and produce better
coals. Density and moisture content are two critical
factors to consider when purchasing wood for your
stove.
The following is a list of some wood species and
their relative BTU (British Thermal Unit) content. The
higher the BTU content, the longer the burn.
Firewood with higher BTUs is generally ideal for a
wood stove.
Wood Heat Value: Sorted By Btu
Content
Common Name Lb/ cord MBTU/
cord
High
Osage Orange (Hedge) 4,728 32.9
Hickory, Shagbark 4,327 27.7
Hop Hornbeam (Ironwood) 4,267 27.3
Beech, Blue (Ironwood) 3,890 26.8
Birch, Black 3,890 26.8
Locust, Black 3,890 26.8
Hickory, Bitternut 3,832 26.7
Locust, Honey 3,832 26.7
Apple 4,100 26.5
Mulberry 3,712 25.8
Oak, White 4,012 25.7
Medium High
Beech, European 3,757 24
Maple, Sugar 3,757 24
Oak, Red 3,757 24
Ash, White 3,689 23.6
Birch, Yellow 3,689 23.6
Medium
Juniper, Rocky Mtn 3,150 21.8
Elm, Red 3,112 21.6
Coffeetree, Kentucky 3.112 21.6
Hackberry 3,247 20.8
Tamarack 3,247 20.8
Birch, Gray 3,179 20.3
Birch, White (Paper) 3,179 20.3
Walnut, Black 3,192 20.2
Cherry 3,120 20
Ash, Green 2,880 19.9
Cherry, Black 2,880 19.9
Elm, American 3,052 19.5
Elm, White 3,052 19.5
Sycamore 2,808 19.5
Ash, Black 2,992 19.1
Maple, Red 2,924 18.7
Fir, Douglas 2,900 18.1
Medium Low
Boxelder 2,797 17.9
Alder, Red 2,710 17.2
Pine, Jack 2,669 17.1
Pine, Norway (Red Pine) 2,669 17.1
Pine, Pitch 2,669 17.1
Catalpa 2,360 16.4
Hemlock 2,482 15.9
Spruce, Black 2,482 15.9
Pine, Ponderosa 2,380 15.2
Low
Aspen, American 2,290 14.7
Butternut (Walnut, White) 2,100 14.5
Spruce 2,100 14.5
Willow 2,100 14.5
Fir, Balsam 2,236 14.3
Pine, White (Eastern,
Western) 2,236 14.3
Fir, Concolor (White) 2,104 14.1
Basswood (Linden) 2,108 13.8
Buckeye, Ohio 1,984 13.8
Cottonwood 2,108 13.5
Cedar, White 1,913 12.2
Moisture content also plays a key role in the
performance of your stove. Wood freshly cut from a
living tree (green wood) contains a great deal of
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