Heatilator • NDV30-IFT, NDV33-IFT, NDV36-IFT, NDV36-IFT-NVR, NDV42-IFT Installation Manual • 2620-980 Rev. C • 8/20
24
Figure 4.14
Two or Three Elbows Installed Horizontally
H
1
V
1
H
2
H
3
Installed
Horizontally
Installed
Vertically
H
2
V
1
Minimum
H
1
+ H
2
Maximum
H
1
+ H
2
+
H
3
Maximum
6 in.
152 mm
6 ft.
1.83 m
3 ft.
.91 m
12 in.
305 mm
11 ft.
3.35 m
8 ft.
2.4 m
18 in.
457 mm
18 ft.
5.49 m
15 ft.
4.6 m
24 in.
610 mm
25 ft.
7.62 m
22 ft.
6.7 m
V
1
+ H
1
+ H
2
= 50 ft. (15.24 m) Maximum
V
1
+ H
1
+ H
2
+ H
3
= 47 ft. (14.33 m) Maximum
Top Vent - Horizontal Termination
(continued)