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Rear Vent - Horizontal Termination - (continued)
Three Elbows
H
Maximum
V
Minimum
1
1
Back to Back
1 ft.
305 mm
90º Elbows
2 ft.
610 mm
6 in.
3 ft.
914 mm
1 ft.
305 mm
3 ft.
914 mm
2 ft.
610 mm
3 ft.
914 mm
3 ft.
914 mm
3 ft.
914 mm
4 ft.
V
+ H
+ H
+ H
= 40 ft. (12.2 m) Maximum
1
1
2
3
H
+ H
+ H
1
2
INSTALLED
HORIZONTALLY
Figure 4.24
CNXT4236 Series
H
+ H
2
3
1 ft.
305 mm
152 mm
1.5 ft.
457 mm
2 ft.
610 mm
4 ft.
1.2 m
9 ft.
2.7 m
1.2 m
12 ft.
3.7 m
H
= 3 ft. (914 mm) Maximum
1
= 20 ft. (6.1 m) Maximum
3
H
3
Heatilator • CNXT4236IFT, CNXT4842IFT Installation Manual • 2515-980 Rev. R • 1/23
H
+ H
+ H
Max.
1
2
3
2 ft.
610 mm
3.5 ft.
1.1 m
5 ft.
1.5 m
7 ft.
2.1 m
12 ft.
3.7 m
15 ft.
4.6 m
H
Maximum
V
Minimum
1
1
Back to Back
0 ft.
0 mm
90º Elbows
1 ft.
305 mm
6 in.
2 ft.
610 mm
1 ft.
3 ft.
914 mm
2 ft.
3 ft.
914 mm
3 ft.
3 ft.
914 mm
4 ft.
3 ft.
914 mm
5 ft.
V
+ H
+ H
+ H
= 40 ft. (12.2 m) Maximum
1
1
2
3
H
+ H
1
H
2
CXNT4842 Series
H
+ H
2
3
1 ft.
305 mm
152 mm
1.5 ft.
457 mm
305 mm
2 ft.
610 mm
610 mm
3 ft.
914 mm
914 mm
7 ft.
2.1 m
1.2 m
12 ft.
3.7 m
1.5 m
17 ft.
5.2 m
H
= 3 ft. (914 mm) Maximum
1
+ H
= 20 ft. (6.1 m) Maximum
2
3
V
1
H
1
H
+ H
+ H
Max.
1
2
3
1 ft.
305 mm
2.5 ft.
762 mm
4 ft.
1.2 m
6 ft.
1.8 m
10 ft.
3.0 m
15 ft.
4.6 m
20 ft.
6.1 m
31
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