15
Heatilator • FL92 Installation Manual • 4012-081 • Rev C • 10/03/13
20 ft (6.10 m) max.
pipe between an
offset & return
Ceiling Firestop
35 ft (10.7 m)
max. straight
unsupported
chimney height
16.5 ft (4.04 m) min. height/single offset-return
20 ft. (5.03 m) min. height/double offset-return
90 ft (27.43 m) max. height
6 ft (1.83 m) max.
unsupported chimney
above roof
44 in.
(1118 mm)
Effective
Height
Figure 4.1 Chimney Requirements
NOTICE:
A maximum of two pairs of offsets and returns
may be used.
Minimum overall straight height
14 ft
4.27 m
Minimum height with single offset/
return
16.5 ft
5.03 m
Double offset/return minimum height
20 ft
6.1 m
Maximum height
90 ft
27.43 m
Maximum chimney length between an
offset and return
20 ft
6.1 m
Maximum distance between chimney
stabilizers
35 ft
10.67 m
Maximum unsupported chimney
length between the offset and return
6 ft
1.83 m
Maximum unsupported chimney
height above the fireplace
35 ft
10.67 m
Maximum unsupported chimney
above roof
6 ft
1.83 m
WARNING! Risk of Fire!
You must maintain 2 in. (51 mm)
air space clearance to insulation and other combustible
materials around the chimney system. Failure to do so
may cause overheating and fire.
NOTICE
:
You must provide support for the pipe during
construction and check to be sure inadvertent loading has
not dislodged the chimney section from the fireplace or at
any chimney joint.
A. Chimney Requirements
Vertical distances are measured from the base of the
fireplace as shown in Figure 4.1.
4
Chimney and Termination Requirements
Table 4.2 Chimney Component Dimensions
Table 4.1 Chimney Requirements
HEIGHT OF CHIMNEY COMPONENTS
in.
mm
Chimney Stabilizer
SL11
4-3/4
121
Offsets/Returns
SL1130
18
457
Chimney Sections*
SL1106
4-3/4
121
SL1112
10-3/4
273
SL1118
16-3/4
425
SL1136
34-3/4
883
SL1148
46-3/4
1187
* Dimensions reflect effective height.