Vermont Castings Encore Flexburn 2040 Homeowner's Installation And Operating Manual page 9

Floor protection
A tremendous amount of heat radiates from the bottom
plate of your stove. The floor area directly under and
around the stove will require protection from radiant heat
as well as from stray sparks or embers that may escape
the firebox.
Heat protection is provided with the use of the Bottom Heat
Shield supplied with the stove.
Most installations will require the bottom heat shield to be
attached. Only when the stove is placed on a completely
noncombustible surface such as unpainted concrete over
earth may it be used without the heat shield.
Even when the bottom heat shield are installed, most instal-
lations require special thermal protection (insulation) for the
floor beneath. Use an approved 1" (25 mm) noncombustible
hearth pad with k = 0.84 BTU/in ft
material with an R-value of at least 1.18. (Refer to "How
to Determine if Alternate Floor Protection Materials are
Acceptable" section.) The floor protector may be covered
with a decorative noncombustible material if desired. Do
not obstruct the space under the heater.
When using a fire screen with doors open, UL737, Stan-
dard for Fireplace Stoves, use an approved 1" (25 mm)
noncombustible hearth pad with k = 0.84 Btu/in ft
or an equivalent material with an R-value of at least 1.18.
(Refer to "How to Determine if alternate Floor Protection
Materials are Acceptable" section.) The floor protector may
be covered with a decorative noncombustible material if
desired. Do not obstruct the space under the heater. An 8"
chimney and chimney connector is required an the bypass
damper must be in the fully open position.
important: all installations on a combustible floor re-
quire the use of the supplied bottom heat shield.
Protection requirements vary somewhat between the Un-
tied States and Canada as follows:
in U. S. installations the floor protector is required under
the stove and must extend at least 16" (not including the
ash lip) from the front of the stove ("F", Fig. 11), and at least
6" from the sides and rear. ("D" and "E", Fig. 11)
In rear venting configurations, floor protection must also
extend under the chimney connector and 2" to either side.
("C", Fig. 11) For the 8" (203 mm) connector, the protector
must be a minimum of 12" (305 mm) wide. For the 6" (152
mm) connector, the protector must be 10" (254 mm) wide.
The protector must be centered under the connector.
To meet these requirements, a floor protector must be at
least 39" wide and 45" deep.
in canada: A noncombustible floor protector is required
under the stove as well. The floor protector must extend
18" (457 mm) to the front ("F", Fig. 11), and 8" (203 mm)
from the sides and rear. ("D" and "E", Fig. 11)
30005295
Encore ® FlexBurn
hr °F or an equivalent
2
hr °F
2
™ 2040 Non-Catalytic / Catalytic Woodburning Stove
To meet these requirements, a floor protector must be at
least 43" (1092 mm) wide and 49" (1245 mm) deep.
D
E
F
A
U.S.
A. 39"
B. 45"
C. 12"
10"
D. 6"
E. 6"
F. 16"
Fig. 11 Required floor protection dimensions.
how to Determine if alternate Floor
protection Materials are acceptable
All floor protection must be noncombustible (i.e. metals,
brick, stone, mineral fiber boards, etc.). Any organic materi-
als (i.e. plastics, wood paper products, etc.) are combus-
tible and must not be used. The floor protection specified
includes some form of thermal designation such as R-value
(thermal resistance) or k-factor (thermal conductivity).
procedure:
1. Convert specifications to R-value:
i. R-value given - no conversion needed.
ii. k-factor is given with a required thickness (T) in
1
inches:
R = x T
k
iii. K-factor is given with a required thickness (T) in
1
inches:
R =
K x 12
iv. r-factor is given with a required thickness (T) in
inches: R = r x T
2. Determine the R-value of the proposed alternate floor
protector:
i. Use the formula in Step 1 to convert values not ex-
pressed as R.
ii. For multiple layers, add R-values of each layer to
determine overall R-value.
3. If the overall R-value of the system is greater than the
R-value of the specified floor protector, the alternate
is acceptable.
C
B
E
E
F
A
canada
43" (1092 mm)
49" (1245 mm)
12" (305 mm) 8" Connector
10" (250 mm) 6" Connector
ST500
Defiant
8" (203 mm)
floor protection
8" (203 mm)
1/31/02 djt
18" (460 mm)
x T
E
ST500
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