Hearth and Home Technologies C-40 - Manual (Page 20)

Page 20 Heatilator • Constitution EPA Fireplace • 480-1091C November 11, 2008
A. Chimney Requirements
Vertical distances are measured from the base of the fire-
place as shown in Figure 20.1.
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
the fireplace assembly to the point where the smoke exits
the termination cap.
• Subtract the effective height of the fireplace assembly from
the overall height of the fireplace installation (measured
from the base of the fireplace to the bottom of the
termination cap, 13 ft. (4m).
• Refer to Table 20.2 to determine what components must
be selected to complete the fireplace installation.
• Determine the number of ceiling firestops, stabilizers,
roof flashing, etc. required to complete the fireplace
installation.
6 ft (1.8 m) max.
unsupported
run
20 ft (6.10 m) max.
pipe between an
offset & return
Ceiling firestop
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
6 ft (1.83 m) max.
unsupported chimney
above roof
44 in.
(1118 mm)
to top of
standoffs
Figure 20.1 Chimney Requirements
Table 20.2
Fire Risk
• Must maintain 2 in. (51 mm) air clearance
to insulation and other combustible
materials.
WARNING
HEIGHT OF CHIMNEY COMPONENTS in. mm
Chimney Stabilizer
SL3 4-3/4 121
Ceiling Firestops
FS338 0 0
FS339 0 0
FS340 0 0
Offsets/Returns
SL315 13-3/8 340
SL330 15-1/2 394
Roof Flashing
RF370 0 0
RF371 0 0
Chimney Sections*
SL306 4-3/4 121
SL312 10-3/4 273
SL318 16-3/4 425
SL324 22-3/4 578
SL336 34-3/4 883
SL348 46-3/4 1187
* Dimensions reflect effective height.
Note: A maximum of two pairs of offsets and returns may
be used.
B. Chimney Termination Requirements
Minimum overall straight height 13 ft 3.96 m
Minimum height with single offset/
return
14.5 ft 4.42 m
Double offset/return minimum height 20 ft 6.1 m
Maximum height 50 ft 15.24 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
• 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.
Asphyxiation Risk.