Heatilator Birmingham BIR50-B Installation Manual page 31

Note: The bottom of the fireplace opening
is 3-3/4 in. (95.3mm) above the bottom of
the fireplace. Finished hearth must NOT
extend above this level.
Finished
Floor
Hearth Extension
1 in. Micore and
1/2 in. Durock
Non-combustible Finishing Material
or equivalent
insulation
Figure 6.10 Flush Hearth Extension Side View
C. Non-Combustible Sealant Material
After completing the framing and applying the facing
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Non-combustible Sealant
Figure 6.11 Place Non-combustible Sealant
WARNING! Risk of Fire!
• Maintain clearances.
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material such as cement board is acceptable.
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be constructed entirely of non-combustible materi-
als (i.e., steel studs, concrete board, etc.).
WARNING! Risk of Fire!
Hearth & Home Technologies is not responsible for
discoloration, cracking or other material failures of
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Heatilator • Birmingham BIR50-B Installation Manual • 4059-701• Rev AA • 06/23
Bottom of
Fireplace
Opening
30 in. Min.
Protective Metal
Hearth Strip
D. Sidewalls/Surrounds
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Figure 6.12.
Figure 6.12 Mantel Leg, Surround or Wall Projections (ac-
ceptable on both sides of opening)