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Heatilator • GDST4336IFT, GDFL4136IFT Installation Manual • 2480-980 Rev. B • 3/17
C. Non-Combustible Material Installation
The factory-installed non-combustible board spans the
distance from the top of the
fi
replace to the framing header.
This board must be used. See Figure 6.13.
Figure 6.13 Non-combustible Board
NON-COMBUSTIBLE BOARD
NON-COMBUSTIBLE BOARD
WARNING! Risk of Fire!
DO NOT remove factory-
installed non-combustible material.