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
fi replace 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 fi replace
Maximum unsupported chimney
above roof
NOTICE: A maximum of two pairs of offsets and returns
may be used.
WARNING! Risk of Fire!
air space clearance to insulation and other combustible
materials around the chimney system. Failure to do so
may cause overheating and fi re.
6 ft (1.8 m) max.
unsupported
run
20 ft (6.10 m) max.
pipe between an
offset & return
Attic Insulation Shield
Ceiling firestop
44 in.
(1118 mm)
to top of
standoffs
Figure 5.1

Chimney Requirements

22
Heatilator • C40 Constitution • 480-2340 Installation Manual • Rev B 01-29-13
13 ft
14.5 ft
20 ft
50 ft
20 ft
35 ft
6 ft
35 ft
6 ft
You must maintain 2 in. (51 mm)
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 fi replace or at
any chimney joint.
Table 5.2 Chimney Component Dimensions
3.96 m
HEIGHT OF CHIMNEY COMPONENTS
4.42 m
Chimney Stabilizer
SL3
6.1 m
Ceiling Firestops
15.24 m
FS338
6.1 m
FS339
10.67 m
FS340
Offsets/Returns
1.83 m
SL315
SL330
10.67 m
Roof Flashing
RF370
1.83 m
RF371
Chimney Sections*
SL306
SL312
SL318
SL324
SL336
SL348
* Dimensions refl ect effective height.
in. mm
4-3/4 121
0 0
0 0
0 0
13-3/8 340
15-1/2 394
0 0
0 0
4-3/4 121
10-3/4 273
16-3/4 425
22-3/4 578
34-3/4 883
46-3/4 1187