Chimney And Termination Requirements; Chimney Requirements - Heatilator C40 Installation Manual

5

Chimney and Termination Requirements

A. Chimney Requirements
Vertical distances are measured from the base of the
fireplace as shown in Figure 5.1.
Table 5.1 Chimney Requirements
Minimum overall straight height
Minimum height with single offset/
return
Double offset/return minimum height
Maximum height
Maximum chimney length between an
offset and return
Maximum distance between chimney
stabilizers
Maximum unsupported chimney
length between the offset and return
Maximum unsupported chimney
height above the fireplace
Maximum unsupported chimney
above roof
NOTICE: A maximum of two pairs of offsets and returns
may be used.
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.
6 ft (1.8 m) max.
unsupported
run
20 ft (6.10 m) max.
pipe between an
offset & return
Attic Insulation Shield
Ceiling firestop
Chimney Air Kit
required with SL
chimney
43 3/4 in.
(1111 mm)
to top of
standoffs
Figure 5.1

Chimney Requirements

22 Heatilator • C40 Constitution • 480-2340 Installation Manual • Rev K • 8/24/15
13 ft 3.96 m
14.5 ft 4.42 m
20 ft 6.1 m
50 ft 15.24 m
20 ft 6.1 m
35 ft 10.67 m
6 ft 1.83 m
35 ft 10.67 m
6 ft 1.83 m
6 ft (1.83 m) max.
unsupported chimney
above roof
35 ft (10.7 m)
max. straight
unsupported
chimney height
14.5 ft (4.42 m) min. height/single offset-return
20 ft. (6.10 m) min. height/double offset-return
50 ft (15.24 m) max. height
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.
Table 5.2 Chimney Component Dimensions
HEIGHT OF CHIMNEY COMPONENTS
Chimney Stabilizer
SL3
Offsets/Returns
SL315
SL330
Chimney Sections*
SL306
SL312
SL318
SL324
SL336
SL348
* Dimensions reflect effective height.
in. mm
4-3/4 121
13-3/8 340
15-1/2 394
4-3/4 121
10-3/4 273
16-3/4 425
22-3/4 578
34-3/4 883
46-3/4 1187