Heatilator NDV30-IFT Installation Manual page 28

Top Vent - Vertical Termination (continued)
Four Elbows
V
3
V + V
1
6 ft (1.83 m) min.
60 ft (18.29 m) max.
Figure 4.21
Heatilator • NDV30-IFT, NDV33-IFT, NDV36-IFT, NDV36-IFT-NVR, NDV42-IFT Installation Manual • 2620-980 Rev. C • 8/20
28
Maximum horizontal run (H
but cannot exceed 23 ft (7.01 m).
H
2
+ V
2 3
) is 100% of vertical,
TOTAL
Elbows Installed Vertically
V
2
H
1
V
1