Clearances; Minimum Clearances To Combustibles - Heatilator BIR42-B Installation Manual

B. Clearances
WARNING! Risk of Fire!
You must comply with all minimum air space clearances
to combustibles as specifi ed in Figure 3.2. DO NOT pack
required air spaces with insulation or other materials.
Framing or fi nishing material used on the front of, or in
front of, the fi replace closer than the minimums listed must
be constucted entirely of non-combustible materials (i.e.,
steel studs, concrete board, etc.). Failure to comply may
cause fi re.
Figure 3.2 Clearances to Combustible Materials
10 Heatilator • Birmingham 42-B Installation Manual • 4059-715 • Rev C • 2/14/13
Storm Collar
Roof Flashing
(attic)
(insulation)
2 in. (51 mm) min.
Ceiling Firestop
48 in.
1219 mm
0 in.
to floor

Minimum Clearances to Combustibles

WITHIN ENCLOSURE AREA
Fireplace to backwall
Fireplace to sidewall
Top standoffs to header
Door opening to sidewall
MANTEL
Mantel minimum height
Maximum mantel depth
Shaded areas
represent
2 in. (51 mm) min.
air space clearance
required around pipe
Attic
Insulation
Shield
(ceiling)
Offset/Return (secured
with hanger straps)
(ceiling)
Must have 2 in. (51 mm)
minimum clearance
to header
Transition
1-1/2 in. (38 mm) to back &
sides of appliance
(except at nailing flanges
where it is 1/2 in. [13 mm])
1-1/2 in. (38 mm)
1-1/2 in. (38 mm)
0 in. (0 mm)
24 in. (610 mm)
63-3/4 in. (1619 mm)
12 in. (305 mm)