Vent Diagrams - Heatilator NDV3630 Owner's Manual

E. Vent Diagrams
To replace the fi rst starter elbow with two 45° elbows, refer
to Figure 7.4. All other 90° elbows can be replaced with
two 45° elbows.
General Rules:
• SUBTRACT 3 ft. from the total H measurement for each
90° elbow installed horizontally.
• SUBTRACT 1-1/2 ft. from the total H measurement for
each 45° elbow installed horizontally.
• A maximum of three 90° elbows (or six 45° elbows) may
be used in any vent confi guration. Some elbows may be
installed horizontally.
• Elbows may be placed back to back anywhere in the
system as long as the fi rst 90° elbow is a starter elbow
except as shown in Figure 7.3.
• When penetrating a combustible wall, a wall shield
fi restop must be installed.
• When penetrating a combustible ceiling, a ceiling fi restop
must be installed.
• Horizontal runs of vent do not require vertical rise;
horizontal runs may be level.
1. Top Vent - Horizontal Termination
Two 45° Elbows
Installation requirements to replace the fi rst 90° elbow
with two 45° elbows:
25 ft max.
(7.62 m)
Figure 7.3 Minimum Installation Requirements for Two 45°
Elbows-Top Vent-Horizontal Termination
4 ft min.
(1.22 m)
Heatilator • Novus NDV Series • 4055-187 Rev. X • 6/13
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 which can only be attached
to the appliance starting collar.
When looking at horizontal termination diagrams, the
adapter is not counted as part of the minimum vertical
(V min.) requirements.
1
Whether horizontal or vertical termination, the adapter is
counted as part of the maximum vertical limitations.
All venting rules for the vent run must still be followed.
HORIZONTAL EXAMPLE
H
= 11 ft.
1
max.
H
= 11 ft.
1
max
VERTICAL EXAMPLE
12 ft (3.66 m) min.
60 ft (18.29 m) max.
DVP
V = 1 ft.
1
DVP
V = 1 ft.
1
DVP-SLP24
SLP
DVP-SLP24
Adapter
12 ft (3.66 m) min.
60 ft (18.29 m) max.
SLP
25