Hearth and Home Technologies BIR42 owner manual Air Space Clearances

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

Roof Flashing

(attic)

(insulation)

2 in. (51 mm) min.

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)

Ceiling Firestop	Must have 2 in. (51 mm)
	minimum clearance
	to header
	Transition

Object
Combustible	48 in.
	1219 mm
	0 in.
	to floor
Figure 6.2 Air Space Clearances

1-1/2 in. (38 mm) to back & sides of appliance (except at nailing flanges where it is 1/2 in. [13 mm])

Heatilator • Birmingham BIR42 • 4059-308 F • 11/08 19