Heatilator Birmingham BIR42-B Installation Manual page 13

E. Secure and Level the Fireplace
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WARNING! Risk of Fire!
loose insulation.
• DO NOT install against vapor barriers or exposed
insulation.
• Secure insulation and vapor barriers.
• Provide minimum air space clearances at the sides and
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F. Protective Metal Hearth Strips
WARNING! Risk of Fire!
strips MUST be installed on combustible surfaces. DO
NOT cover metal strips with combustible materials.
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embers or other burning material falling from the
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surfaces.
• Protective metal hearth strips MUST be installed.
• Hearth extensions MUST be installed exactly as
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Heatilator • Birmingham 42-B Installation Manual • 4059-715 • Rev AD • 06/23
Prevent contact with sagging,
Protective metal hearth
High temperatures, sparks,
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1 in. (25 mm) overlap
Minimum
Metal strips are placed 2 in. (51 mm)
under the front of the fireplace and must
extend beyond the front and sides of
fireplace opening by 2 in. (51 mm).
Figure 3.6 Position the Protective Metal Hearth Strips
Top piece must overlap
Raised Platform
2 in.
(51 mm)
2 in.
(51 mm)
Figure 3.7 Protect the Front of an Elevated Platform
G. Outside Air Kit (Required on both sides)
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inlet hoods.
Note: 0D[LPXP OHQJWK LV  IHHW
bottom piece
1 in. (25 mm) min.
overlap
Floor
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