18
Majestic Biltmore Series • SB100 • 4013-303 Installers Manual • Rev H • 08/20
6 ft (1.83 m) max.
unsupported run
20 ft (6.10 m) max.
pipe between an
offset & return
Ceiling Firestop
35 ft (10.67 m)
max. straight
unsupported
chimney height
20.5 ft (6.25 m) min. height/single offset-return
24 ft. (7.32 m) min. height/double offset-return
90 ft (27.43 m) max. height
6 ft (1.83 m) max.
unsupported chimney
above roof
68-1/8 in.
(1730 mm)
Effective Height
(bottom of fireplace
to top of starter collar)
Gas
Knockout
Figure 4.1 Chimney Requirements
NOTICE:
A maximum of two pairs of offsets and returns
may be used.
Minimum overall straight height
20 ft
6.1 m
Minimum height with single offset/
return
20.5 ft
6.25 m
Double offset/return minimum height
24 ft
7.32 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.
