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.

Heat & Glo • HST-42D • 27177 • Rev AB • 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
1/2 in. (13 mm) to back &
sides of appliance
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
Figure 6.2 Clearances to Combustible Materials

Note: Chimney air kit is not shown, but is required in Canada.