A. Chimney Requirements
Measure vertical distances from the base of the fireplace
as shown in Figure 8.2.
•
Minimum overall straight height
•
Minimum height with offst/return
•
Maximum height
•
Maximum chimney length bewtween an offset
and return
•
Maximum distance between chimney stabilizers
•
Double offset/return minimum height
•
Maximum unsupported chimney length between
the offset and return
•
Maximum unsupported chimney height above the
fireplace
•
Maximum unsupported chimney above roof
WARNING! Risk of Fire! You must maintain 2 in. (51
mm) air space clearance to insulation and other combus-
tible materials around the chimney system. Failure to do
so may cause overheating and fire.
Table 8.1
HEIGHT OF CHIMNEY COMPONENTS
Chimney Stabilizer
SL3
Ceiling Firestops
FS338
FS339
FS340
Offsets/Returns
SL315
SL330
Roof Flashing
RF370
RF371
Chimney Sections*
SL306
SL312
SL318
SL324
SL336
SL348
* Dimensions reflect effective height.
ft
m e t e r s
1 4 . 5
4 . 4 2
16
4 . 8 8
90
2 7 . 4 3
20
6 . 1 0
35
1 0 . 6 7
20
6 . 1 0
6
1 . 8 3
35
1 0 . 6 7
6
1 . 8 3
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
Heatilator • ST36D • 20396 • Rev AG • 7/12
Determine the chimney components needed to complete
your particular installation:
•
Measure the total vertical height of the fireplace
installation from the base of the fireplace assembly to
the approximate location of the bottom of the termination
cap.
•
Subtract the effective height of the fireplace assembly
(see Figure 8.2) from the total vertical height to determine
the overall height of the chimney installation.
•
Create a schematic for your application similar to Figure
8.2 showing components required (referring to Table
8.1). Figure 8.1 identifies those components and where
used.
•
Install a ceiling firestop whenever the chimney penetrates
a floor/ceiling.
NOTICE: A maximum of two pairs of offsets and returns
may be used.
CAUTION! Risk of Fire and/or Asphyxiation! DO
NOT connect this fireplace to a chimney flue servicing
another appliance. DO NOT connect to any air distribu-
tion duct or system. These actions could cause over-
heating/fire in the chimney flue, or release of exhaust
fumes into the living areas.
20 ft (6.10 m) max.
pipe between an
offset & return
Ceiling firestop
47-1/4 in.
(1200 mm)
Effective
Height
Figure 8.2
Chimney Requirements
6 ft (1.83 m) max.
unsupported chimney
above roof
35 ft (10.67 m) max. straight
unsupported chimney height
16 ft (4.88 m) min. height (single offset-return)
20 ft. (6.10 m) min. height (double offset-return)
90 ft (27.4 m) max. height
25