Page 9
5100-I ACT WOOD INSERT
R
438-0380E
April 21, 2010
Hearth Extension
A
B
C
F
E
Insert
SideW
all
Fascia or Trim
Mantel
D
Maximum Mantel Depth: 12 inches (305mm)
B. C
learance to Combustibles
C. Optional Mantel Deflector
Optional mantel deflectors may be purchased from your
dealer to reduce clearances to a mantel. An 8 inch (203mm)
deflector allows a reduction down to 7 inches (686mm).
-ANTELDEFLECTOR
Figure 9.1
• Comply with all minimum clearances to
combustibles as specified.
• Failure to comply may cause fire.
WARNING
Fire Risk.
Minimum Clearances To Combustible Material
With 8 inch (203mm)
Mantel Deflector
35"/889mm
16"/406mm
C
7"/178mm
7"/178mm
D
CANADA
40"/1015mm
27"/686mm
12"/305mm
12"/305mm
USA
8"/200mm
8"/200mm
F
16"/406mm
18"/450mm
E
FLOOR PROTECTION
*Zero Clearance Installations USA Only
Masonry, Heat Exchanger
& *Zero Clearance
B
A
Side Trim
Top Trim
1-1/2” (38mm) thick
3/4” (19mm) thick
TRIM
Maximum Mantel Depth
12”/305mm
Thermal protection must be 1/ inch (1mm) minimum
thickness (“k” value = 0.8, R value = 0.59) or equivalent
material.
All floor protection must be non-combustible (i.e., metals,
brick, stone, mineral fiber boards, etc.). Any organic materi
-
als (i.e., plastics, wood paper products, etc.) are combustible
and must not be used. The floor protection specified includes
some form of thermal designation such as R-value (thermal
D. Floor Protection USA & Canada
E. Calculating Alternate Floor Protection
Material
Thermal Conductivity: k value
The k value indicates the amount of heat (in BTU’s) that will
flow in 1 hour through 1 square foot of a uniform material 1
inch thick for each degree (F) of temperature difference from
one side of the material to the other. The LOWER the k factor
means less heat is being conducted through the non-combus-
tible material to the combustible material beneath it. The k
value of a material must be equal or smaller then the required
k value to be acceptable.
(BTU) (inch)
(foot
2
(hour) (
o
F)
Thermal Resistance: R value
The R value is a measure of a material’s resisteance to heat
transfer. R value is convenient when more than one material
is used since you can add the R values together, whereas you
can not do this for k value. The HIGHER the R factor means
less heat is being conducted through the non-combustible ma-
terial to the combustible material beneath it. The R value of a
material must be equal or larger then the required R value to
be acceptable.
Converting k to R:
Divide 1 by k and multiply the results times the thickness in
inches of the material.
R = 1/k x inches of thickness
Converting R to k:
Divide the inches of thickness by R.
k = inches of thickness/R
Calculatons:
Example: Floor protection requires k value of 0.8 and / inch
thick.
Alternative material has a k value of 0.6 and is / inch thick.
Divide 0.6 by .75 = k value of 0.80. This k value is smaller than
0.84 and therefore is acceptable.
