Clearances - Heatilator ST42A Owner's Manual

B. Clearances
10
Fire Risk
• Comply with all minimum clearances to combustibles as specifi ed.
• Framing or fi nishing material used on the front of, or in front of, the
appliance closer than the minimums listed, must be constructed entirely
of noncombustible materials (i.e., steel studs, concrete board, etc.).
Failure to comply may cause fi re.
Storm Collar
Roof Flashing
2 in. min.
(51 mm)
(attic)
2 in. (51 mm) min.
Ceiling Firestop
2 in. (51 mm) min.
0 in.
to floor
Figure 3.2 Clearances to Combustible Materials
Note: Chimney air kit and 11-10 in. (279-254 mm) adapter not
shown but required in Canada.
Heatilator • ST42A US-CAN • 4012-039 Rev D • 11/07
WARNING
2 in. (51 mm) min.
Attic
Insulation
Shield
Ceiling Firestop
(ceiling)
2 in. (51 mm) min. 2 in. (51 mm) min.
Offset/Return with
hanger straps
(ceiling)
2 in. (51 mm) min.
Must have 2 in. (51 mm)
minimum clearance
to header
0 in. to level
of standoffs
1/2 in. (13 mm) to side of appliance