Heatilator NNXT4236IF-B Installation Manual page 20

Note: The NDV 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.
Top Vent - Horizontal Termination
Top Vent—Horizontal Termination—Two 45º Elbows
Installation requirements to replace the first 90º elbow
with two 45º elbows:
W
A
L
L
25 ft max.
(7.62 m)
Figure 4.9 Minimum Installation Requirements for Two 45 Degree
Elbows - Top Vent - Horizontal Termination
20 Heatilator • NNXT4236IF-B, NNXT4236ILF-B, NNXT3933IF-B, NNXT3933ILF-B Installation Manual • 2384-980 Rev. J • 6/17
4 ft min.
(1.22 m)
HORIZONTAL EXAMPLE
(IDENTICAL VENT RUNS USING DVP AND SLP PIPE)
DVP PIPE
H = 11 ft.
1
max.
SLP PIPE
H = 11 ft.
1
max.
2 ft. SLP
AND
DVP-2SL
VERTICAL EXAMPLE
(IDENTICAL VENT RUNS USING DVP AND SLP PIPE)
12 ft (3.66 m) min.
60 ft (18.29 m) max.
6 ft (1.8 m) min.
60 ft (18.29 m) max.
DVP
Figure 4.10
V = 1 ft.
1
V = 1 ft.
1
DVP-SLP24
OR
2 ft. SLP
DVP-SLP24 OR
AND
Adapter
DVP-2SL
SLP