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Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15
4. Rear Vent - Vertical Termination - (continued)
Three Elbows
Figure 4.20
12 ft (3.66 m) min.
60 ft (18.29 m) max.
0 min.
6 ft (1.83 m) max.
Maximum horizontal run is
100% of vertical, but can-
not exceed 18 ft (5.49 m)
