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35Heatilator • CD4236IR-C, CD4842IR-C • 2207-900 Rev. J • 11/11
Rear Vent - Vertical Termination
One Elbow
Figure 7.18
Two Elbows
Figure 7.19
H
1
V
1
INSTALLED
HORIZONTALLY
H
1
H
2
V
1
V
1
Minimum H
1
Maximum
6 in. 152 mm 2 ft. 610 mm
1 ft. 305 mm 3 ft. 914 mm
2 ft. 610 mm 5 ft. 1.5 m
3 ft. 914 mm 7 ft. 2.1 m
4 ft. 1.2 m 8 ft. 2.4 m
5 ft. 1.5 m 8 ft. 2.4 m
V
1
+ H
1
= 40 ft. (12.2 m) Maximum
H
1
= 8 ft. (2.4 m) Maximum
V
1
Minimum H
1
+ H
2
Maximum
Back to Back 90º Elbows 3 ft. 914 mm
2 ft. 610 mm 6 ft. 1.8 m
4 ft. 1.2 m
9 ft. 2.7 m
6 ft. 1.8 m 12 ft. 3.7 m
8 ft. 2.4 m 15 ft. 4.6 m
V
1
+ H
1
= 40 ft. (12.2 m) Maximum
H
1
+ H
2
= 8 ft. (2.4 m) Maximum