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)
Shaded areas
represent
2 in. (51 mm) min.
air space clearance required around pipe
Attic
Insulation
Shield
(ceiling)
2 in. (51 mm) min. 
Offset/Return (secured
with hanger straps)
(ceiling)
Ceiling Firestop 
1/2 in. (13 mm) to
back of appliance 
Object
Combustible
Must have 2 in. (51 mm)
minimum clearance
to header
0 in. to level of standoffs
48 in.
1219 mm 0 in. to floor
Figure 6.2 Air Space Clearances
Heat & Glo • | 19 |
