Clearances - Heatilator BIR50-B Owner's Manual

B. Clearances
WARNING! Risk of Fire! You must comply with all minimum air space clearances to combustibles as specified in Fig-
ure 6.2. DO NOT pack required air spaces with insulation or other materials.
Storm collar must
be installed 1 in.
1/2 in. air space
off chase top
established by
spacers
1/2 in.
Air Space
Spacers furnished with
complete Chase Top Flashing
(May be field-fabricated)
CHASE TOP CLEARANCES
Figure 6.2 Air Space Clearances
1 1/2" Ventilation Opening
around Chimney Pipe
Chase Top
Flashing
Roof
Radiation Shield
(insulation)
2 in. (51 mm) min.
Ceiling Firestop
48 in.
1219 mm
Heatilator • Birmingham BIR50-B • 4059-682D• 9/12
Storm Collar
1 in.
2 in. (51 mm) min.
air space clearance
(attic)
required around pipe
(ceiling)
(ceiling)
0 in.
to floor
Chase Top Flashing
Shaded areas
represent
Attic Shield Collar
Attic
Insulation Shield
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])
19