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Heatilator • NNXT33-IFT, NNXT33L-IFT, NNXT36-IFT, NNXT36L-IFT Installation Manual • 2628-980 Rev. C • 8/20
20
Figure 4.12
Top Vent - Horizontal Termination
Top Vent—Horizontal Termination—Two 45º Elbows
Installation requirements to replace the first 90º elbow
with two 45º elbows:
4 ft min.
(1.22 m)
25 ft max.
(7.62 m)
W
A
LL
Figure 4.11 Minimum Installation Requirements for Two 45 De-
gree Elbows - Top Vent - Horizontal Termination
Note: The Novus series appliances can adapt to SLP
series vent pipe when venting off the top of the appliance.
You must use a DVP-SLP24 adapter or a DVP-2SL and
two feet of SLP pipe which can only be attached to the
appliance starting collar.
When looking at horizontal termination diagrams, neither
adapter is counted as part of the minimum vertical (V1 min.)
requirements.
All venting rules for the vent run must still be followed.
H
1
= 11 ft.
max.
V
1
= 1 ft.
DVP PIPE
HORIZONTAL EXAMPLE
(IDENTICAL VENT RUNS USING DVP AND SLP PIPE)
H
1
= 11 ft.
max.
DVP-SLP24
SLP PIPE
V
1
= 1 ft.
2 ft. SLP
DVP-2SL
AND
OR
DVP-SLP24
Adapter
*6 ft (1.83 m) min.
60 ft (18.29 m) max.
*6 ft (1.83 m) min.
60 ft (18.29 m) max.
DVP
SLP
VERTICAL EXAMPLE
(IDENTICAL VENT RUNS USING DVP AND SLP PIPE)
*
Minimum vertical dimension includes
vertically oriented 45 degree elbows.
2 ft. SLP
DVP-2SL
AND
OR