6 ft (1.8 m) max.
unsupported
run
20 ft (6.10 m) max.
pipe between an
offset & return
Ceiling firestop
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
6 ft (1.83 m) max.
unsupported chimney
above roof
43 3/4 in.
(1111 mm)
to top of
standoffs
Attic Insulation Shield
Chimney Air Kit
required with SL
chimney
Figure 5.1 Chimney Requirements
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.
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 5.1.
5
Chimney and Termination Requirements
Table 5.2 Chimney Component Dimensions
Table 5.1 Chimney Requirements
Minimum overall straight height
13 ft. (3.96 m)
Minimum height with offset/return
14.5 ft. (4.42 m)
Maximum height
50 ft. (15.24 m)
Maximum chimney length between an offset
and return
20 ft.
(6.1 m)
Maximum distance between chimney
stabilizers
35 ft (10.67 m)
Double offset/return minimum height
20 ft
(6.1 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)
HEIGHT OF CHIMNEY COMPONENTS
in.
mm
Chimney Stabilizer
SL3
4-3/4
121
Offsets/Returns
SL315
13-3/8
340
SL330
15-1/2
394
Chimney Sections*
SL306
4-3/4
121
SL312
10-3/4
273
SL318
16-3/4
425
SL324
22-3/4
578
SL336
34-3/4
883
SL348
46-3/4
1187
* Dimensions reflect effective height.
22
Heat & Glo • NORTHSTAR • 480-2360 Installation Manual • Rev H • 8/20/14