Clearances - Heatilator BIR42 Owner's Manual

B. Clearances
WARNING! Risk of Fire! You must comply with all minimum air space clearances to combustibles as specifi ed in Fig-
ure 6.2. DO NOT pack required air spaces with insulation or other materials.
2 in. (51 mm) min.
Ceiling Firestop
48 in.
1219 mm
Figure 6.2 Air Space Clearances
Storm Collar
Roof Flashing
(attic)
(insulation)
0 in.
to floor
Heatilator • Birmingham BIR42 • 4059-308 F • 11/08
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])
19