MHSC WMC36 Operating Manual page 16

WMC Series Woodburning Fireplace
COMMON MATERIALS AND FACTORS
MATERIAL
EH2416
0.458
(MHSC)
Common Brick
5.0
R Value is for 1/2 inch.
* Units of K = BTU/SQ FT/HR/˚F/IN
** Thickness of Listed Material
Fig. 25 Hearth extension material factors.
example of Determining Hearth extension
FP533ADD
equivalents
Addendum
6/1/99 djt
NEW K of new material (per inch)
8/4/99 changed .2 to .1
required = ------------------------------------
thickness K of listed material (per inch)
one inch to 1/2 inch djt
To determine the thickness required for any new mate-
rial:
example for Common brick
T (new) = 5.0 / 0.458 x 0.50 in. = 5.46 in. (new re-
quired thickness).
16
MINIMUM
K* R
THICKNESS
1.09 0.50 in.**
0.10 5.46 in.**
FP533ADD
thickness
X of listed
material
Wall Covering
Noncombustible
Decorative
Facing
Seal all cracks
between fireplace
surround and wall
materials with
noncombustible
material.
Noncombustible
Decorative
Covering
Hearth Extension
Insulation
Side View
Fig. 26 Sealing gaps.
2 x 4" Header -
Do not notch at
standoffs.
Seal crack
between fireplace
and hearth extension
with noncombustible
material.
Safety Strips -
Must be overlapped
Z\x" minimum.
FP550
FP550
BR/BC - SEALING
DETAILS
9/29/97
20000583