Hearth and Home Technologies A42R - Manual (Page 19)

19
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.
Heatilator • A36R & A42R • 28376 • Rev AF • 11/08
(insulation)
0 in. to level
of standoffs
Attic
Insulation
Shield
(ceiling)
(roof)
(attic)
(ceiling)
Ceiling Firestop
Offset/Return (secured
with hanger straps)
Storm Collar
Roof Flashing
3/4 in. (19 mm) to back &
sides of appliance
(except at nailing flanges
where it is 1/2 in. [13 mm])
Must have 2 in. (51 mm)
minimum clearance
to header
0 in.
to floor
2 in. (51 mm) min.
Shaded areas
represent
2 in. (51 mm) min.
air space clearance
required around pipe
Combustible Object
48 in.
1219 mm
Adapter attached here
(not shown)
Figure 3.2 Clearances to Combustible Materials
Note: Chimney air kit not shown, but required in Canada.