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Heatilator • CD4236IR-C, CD4842IR-C • 2207-900 Rev. J • 11/1128
INSTALLED
HORIZONTALLY
H
1
H
2
V
1
H
1
V
1
Figure 7.4
Figure 7.5
Top Vent - Horizontal Termination
One Elbow
Two Elbows
Note: For corner installations: A 6 inch (152
mm) section of straight pipe may need to
be attached to the appliance before a 90º
elbow, to allow the vent pipe to clear the top
standoffs.
Note: For corner installations: A 6 inch
(152 mm) section of straight pipe may
need to be attached to the appliance
before a 90º
elbow, to allow the vent
pipe to clear the top standoffs.
V
1
Minimum H
1
Maximum
Elbow only 2 ft 610 mm
1/2 ft. 152 mm 6 ft. 1.8 m
1 ft. 305 mm 11 ft. 3.4 m
1-1/2 ft. 457 mm 18 ft. 5.5 m
2 ft. 610 mm 25 ft. 7.6 m
V
1
+ H
1
= 40 ft. (12.2 m) Maximum
H
1
= 25 ft. (7.6 m) Maximum
V
1
Minimum H
1
+ H
2
Maximum
Elbow only 2 ft 610 mm
1/2 ft. 152 mm 6 ft. 1.8 m
1 ft. 305 mm 11 ft. 3.4 m
1-1/2 ft. 457 mm 18 ft. 5.5 m
2 ft. 610 mm 25 ft. 7.6 m
V
1
+ H
1
+ H
2
= 40 ft. (12.2 m) Maximum
H
1
+ H
2
= 25 ft. (7.6 m) Maximum