Rules
1. Any hearth/floor in front of fireplace within 4 inches of the bottom of the unit must be non-combustible and project
a minimum distance as shown on page 14. The hearth/floor must have a non-combustible finish applied over
the 1/2 inch insulation board provided with the engine. This insulation board acts as a thermal break.
2. Minimum hearth projection is determined by a combination of the height of the hearth above the surface of
combustible floor or carpet and the distance between the hearth and the bottom of the fireplace.
3. Combustible baseboards (1 inch thick or less) located on the wall are acceptable provided they are located below
the base of the raised fireplace.
Unit Raised Above Combustible Hearth or Floor
4" MIN.
Combustible
Floor
Hearth Requirements
Base of Fireplace
Face of
Cement
Board
When the appliance is installed directly on
Top Face of
carpeting, tile or other combustible material
Combustible
other than wood flooring, the appliance
Floor or
shall be installed on a metal or wood panel
Carpet
extending the full width and depth of the
appliance
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