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SECTION V
FREESTANDING MOBILE HOME
INSTALLATION
NOTE: See page 26 for clearances for Mobile Home.
FLOOR PROTECTION
Floor protector must be 3/8" minimum thickness non-combustible material or equivalent. With
the floor protector or hearth extension material specified as one layer of 2" thick brick with a
K* factor of 5.0, you may use alternate materials as long as the K factor(s) is calculated as
follows:
FORMULA: Required thickness = (K of alternate material/K of millboard) x (thickness
of millboard)
EXAMPLE: An alternate inorganic non-combustible millboard with a K of .9375
would require a thickness as follows:
Required thickness = (.9375/5.0) x 2 in.
= 3/8 inch
K FACTORS OF ALTERNATE MATERIALS
Material K Required Thickness
Ceroform 126 .21 1/8"
Limestone 8.0 3.2"
Concrete 8.0 3.2"
Sandstone 13.0 5.2"
Marble 18.0 7.2"
A hearth extension or floor protector thickness above 4" is generally not acceptable due to cost,
floor load capacity, and look. The alternate we recommend is using Ceroform No. 126
millboard 1/8" minimum and putting any type decorative brick or stone (any thickness) on top
of it.
*The “K” factor represents the thermal conductivity of a material and is the time rate of heat
flow through a homogeneous material under steady-state conditions, through unit area, per unit
temperature gradient in the direction perpendicular to a surface.
CHIMNEY
These models are designed for connection to Simpson Dura-vent, Metal Fab and Ameritec
HT-103 2100º F pipe.
25