Chimney Requirements; Chimney Termination Requirements - Heatilator CONSTITUTION C-40 Owner's Manual

A. Chimney Requirements
Vertical distances are measured from the base of the fire-
place as shown in Figure 20.1.
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
Note: A maximum of two pairs of offsets and returns may
be used.
WARNING
Fire Risk
• Must maintain 2 in. (51 mm) air clearance
to insulation and other combustible
materials.
6 ft (1.8 m) max.
unsupported
run
20 ft (6.10 m) max.
pipe between an
offset & return
Ceiling firestop
44 in.
(1118 mm)
to top of
standoffs
Figure 20.1 Chimney Requirements
Page 20
13 ft
14.5 ft
20 ft
50 ft
20 ft
35 ft
6 ft
35 ft
6 ft
6 ft (1.83 m) max.
unsupported chimney
above roof
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
Heatilator • Constitution EPA Fireplace • 480-1091C
B. Chimney Termination Requirements
To determine the chimney components needed to complete
your particular installation, follow the steps below:
• Determine the total vertical height of the fireplace
3.96 m
installation. This dimension is measured from the base of
4.42 m
the fireplace assembly to the point where the smoke exits
the termination cap.
6.1 m
• Subtract the effective height of the fireplace assembly from
15.24 m
the overall height of the fireplace installation (measured
from the base of the fireplace to the bottom of the
6.1 m
termination cap, 13 ft. (4m).
• Refer to Table 20.2 to determine what components must
10.67 m
be selected to complete the fireplace installation.
• Determine the number of ceiling firestops, stabilizers,
1.83 m
roof flashing, etc. required to complete the fireplace
installation.
10.67 m
1.83 m
Table 20.2
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.
Asphyxiation Risk.
WARNING
• Do NOT connect this unit to a chimney flue
servicing another appliance.
• Do NOT connect to any air distribution duct or
system.
May allow flue gases to enter the house.
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
November 11, 2008