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4
Chimney and Termination Requirements
A. Chimney Requirements
Vertical distances are measured from the base of the
fireplace as shown in Figure 4.1.
Table 4.1 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!
air space clearance to insulation and other combustible
materials around the chimney system. Failure to do so
may cause overheating and fire.
20 ft (6.10 m) max.
pipe between an
offset & return
Ceiling Firestop
44 in.
(1118 mm)
Effective
Height
Figure 4.1
Chimney Requirements
16
Heat & Glo • BAY-40, PIER-40 Installation Manual • 4012-071 • Rev D • 10/03/13
14 ft
16.5 ft
20 ft
90 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
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
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 4.2 Chimney Component Dimensions
4.27 m
HEIGHT OF CHIMNEY COMPONENTS
5.03 m
Chimney Stabilizer
6.1 m
SL11
27.43 m
Offsets/Returns
6.1 m
SL1130
Chimney Sections*
10.67 m
SL1106
SL1112
1.83 m
SL1118
10.67 m
SL1136
SL1148
1.83 m
* Dimensions reflect effective height.
in.
mm
4-3/4
121
18
457
4-3/4
121
10-3/4
273
16-3/4
425
34-3/4
883
46-3/4
1187
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