Hearth Extensions - Heatilator ODYSSEY ODY42 Installation & Operating Instructions Manual

ODYSSEY SERIES FIREPLACE WITH GAS LOG SET

3. Hearth Extensions

It is recommended that a hearth extension be installed with all fireplaces. In the event the fireplace is converted to burn
solid (wood) fuel, a hearth extension must be installed with all fireplaces to protect the combustible floor in front of the
fireplace from both radiant heat and sparks. A hearth extension is required while burning solid fuel.
The construction of, and materials used for a factory built hearth extension are shown in Figure 5. A hearth extension of this
construction may be covered with any noncombustible decorative material and may have a maximum thickness of 6”. Seal
gaps between the hearth extension and the front of the fireplace with a noncombustible sealant.
Field constructed hearth extensions should be constructed in accordance with the minimum dimensions provided in
Figure 6.
01/04
(THERMAL CONDUCTIVITY) “k” = BTU in./hr. ft.
TO SUBSTITUTE ALTERNATE INSULATION MATERIAL, YOU NEED TO KNOW THE
“K” FACTOR FOR THAT MATERIAL. TO CALCULATE THE REQUIRED THICKNESS
FOR THE ALTERNATE MATERIAL USE THE FOLLOWING FORMULA:
K ALT
x .5 = THICKNESS OF ALTERNATE MAT. (INCHES)
________
.43
WARNING!
31818 Rev J
EXAMPLES OF INSULATION
REQUIRED
THICKNESS K VALUE
USG MICORE CV230 1/2”
2 °F
EXAMPLE: “K” OF BRICK = 5
5
x .5 = 5.81 in. OF BRICK.
______
.43
0.43
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