HearthStone
Quality Home Heating Products Inc
®
Bennington Model 8350
8
AND STOVE TO EDGE CLEARANCES
MINIMUM FLOOR PROTECTOR SIZE
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.
F
ABRICATING A
H
OMEMADE
F
LOOR
P
ROTECTOR
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 board
1
½”
0.45
Wallboard, Wonderboard, or
Durock
1
½”
0.20
Ceramic board (Fiberfrax or
Micor)
1
½”
1.10
Nominal solid clay brick
1
1”
0.20
Ceramic wall or floor tile
1
¼”
0.01
Mineral wool insulation
2
1”
3.12
Cement mortar
2
1”
0.20
Horizontal still air
2*
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
1
According to Intertek Testing Services, Inc.
2
According to ASHRAE Handbook of Fundamentals 1977
O
UTSIDE
A
IR
S
UPPLY
An outside air source may be connected 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. The termination of the
duct on the outside wall of the house should be located in
such a manner as to preclude the possibility of obstruction
by snow, leaves or other material and should be screened
against animals and insects.
REAR
VIEW
VIEW
SIDE
