Heatilator • NDV30-IFT, NDV33-IFT, NDV36-IFT, NDV36-IFT-NVR, NDV42-IFT Installation Manual • 2620-980 Rev. C • 8/20
26
Figure 4.16
Top Vent - Vertical Termination
V
1
+ V
2
6 ft (1.83 m) min.
60 ft (18.29 m) max.
Maximum horizontal run
(
H
TOTAL
)
is 100% of vertical, but cannot
exceed 26 ft. (7.92 m)
H
1
V
2
V
1
Two Elbows
Figure 4.17 Remove Flue Visor
Figure 4.18 12- 30 Ft. Vertical Run
Figure 4.19 31-60 Ft. Vertical Run
Install Top Vent Flue Visor - No Elbow Configurations
• Remove screws holding flue visor to firebox top. See
Figure 4.17.
• Remove the flue visor.
• Using the screws removed and the same holes, install
the top vent flue baffle and flue visor.
- The top vent flue baffle will be turned to install below
the level of the firebox top for 12-30 ft. vertical runs of
vent. See Figure 4.18.
- The top vent flue baffle will be turned to install inside
for 31-60 ft. vertical runs of vent. See Figure 4.19.