Clearances; Minimum Clearances To Combustibles - Heatilator BIR50-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.
Storm collar must
be installed 1 in.
1/2 in. air space
established by
spacers
1/2 in.
Air Space
Spacers furnished with
complete Chase Top Flashing
(May be field-fabricated)
CHASE TOP CLEARANCES
Figure 3.2 Clearances to Combustible Materials
10 Heatilator • Birmingham BIR50-B Installation Manual • 4059-701 • Rev B • 2/6/13
off chase top
Radiation Shield
2 in. (51 mm) min.
Ceiling Firestop

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
1 1/2" Ventilation Opening
around Chimney Pipe
Chase Top
1 in.
Flashing
Roof
(attic)
(insulation)
48 in.
1219 mm
0 in.
to floor
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)
Storm Collar
Chase Top Flashing
Shaded areas
represent
2 in. (51 mm) min.
air space clearance
required around pipe
Attic Shield Collar
Attic
Insulation Shield
(ceiling)
(ceiling)
Must have 2 in. (51 mm)
minimum clearance
to any combustible materials
including header
0 in. to level
of standoffs
1-1/2 in. (38 mm)
to back & sides
of appliance
(except at nailing
flanges where it is
1/2 in. [13 mm])