Chimney Requirements - Heatilator ST42A Owner's Manual

A. Chimney Requirements
Vertical distances are measured from the base of the fi re-
place as shown in Figure 5.2.
a. Minimum overall straight height
b. Minimum height with offset/return
c. Maximum height
d. Maximum chimney length between an offset and
return
e. Maximum distance between chimney stabilizers
f. Double offset/return minimum height
g. Maximum unsupported chimney length between the
offset and return
h. Maximum unsupported chimney height above the
fi replace
i. Maximum unsupported chimney above roof
Note: A maximum of two pairs offsets and returns may
be used.
WARNING
Fire Risk
• Must maintain 2 in. (51 mm) air clearance
to insulation and other combustible
materials.
Table 5.1
HEIGHT OF CHIMNEY
COMPONENTS
US
Chimney Stabilizer
SL11
Ceiling Firestops
FS538
FS540
Offsets/Returns
SL1130
Roof Flashing
RF570
RF571
Chimney Sections*
SL1106
SL1112
SL1118
SL1136
SL1148
n/a
* Dimensions refl ect effective height.
ft
14.0
16.5
90.0
20.0
35.0
22.0
6.0
35.0
6.0
in. mm
Canada
SL4 4-3/4 121
FS538 0 0
FS540 0 0
SL430 14-1/2 368
RF570 0 0
RF571 0 0
SL406 4-3/4 121
SL412 10-3/4 273
SL418 16-3/4 425
SL436 34-3/4 883
SL448 46-3/4 1187
SLA10 16-3/4 425
Heatilator • ST42A US-CAN • 4012-039 Rev D • 11/07
To determine the chimney components needed to complete
your particular installation, follow the steps below:
• Determine the total vertical height of the fireplace
installation. This dimension is measured from the base of
meters
the fi replace assembly to the point where the smoke exits
4.27
the termination cap.
5.03
• Subtract the effective height of the fi replace assembly from
27.43
the overall height of the fi replace installation (measured
6.1
from the base of the fireplace to the bottom of the
termination cap).
10.67
• Refer to Table 5.1 to determine what components must
6.71
be selected to complete the fi replace installation.
1.83
• Determine the number of ceiling fi restops, stabilizers,
roof flashing, etc. required to complete the fireplace
10.67
installation.
1.83
d & g
Ceiling Firestop
58-7/8 in.
(1495 mm)
Effective
Height
Figure 5.2 Chimney Requirements (refer to list in Sect. 5.A.)
• Do NOT connect this fireplace to a chimney flue
servicing another appliance.
• Do NOT connect to any air distribution duct or
system.
i
h
11-10 in. (279-254 mm)
adapter required in
Canada.
CAUTION
a,b,c,f
17