Heatilator • CNXT Series • 4000-011 Rev N • 11/05 11
A. Vent Table Key
The abbreviations listed in this vent table key are used in the
vent diagrams.
Symbol Description
V
1
First section (closest to appliance) of vertical length
V
2
Second section of vertical length
H
1
First section (closest to appliance) of horizontal length
H
2
Second section of horizontal length
Fire Risk
Explosion Risk
Asphyxiation Risk
Do NOT connect this gas appliance to a
chimney fl ue serving a separate solid-fuel
or gas burning appliance.
• Vent this appliance directly outside.
• Use separate vent system for this
appliance.
May impair safe operation of this appliance or
other appliances connected to the fl ue.
WARNING
B. Use of Elbows
Diagonal runs have both vertical and horizontal vent aspects
when calculating the effects. Use the rise for the vertical as-
pect and the run for the horizontal aspect (see Figure 5.1).
Two 45° elbows may be used in place of one 90° elbow. On
45° runs, 1 ft of diagonal is equal to 8-1/2 in. horizontal run
and 8-1/2 in. vertical run. A length of straight pipe is allowed
between two 45° elbows (see Figure 5.1).
ALL vent configuration specifications MUST be
followed.
• This product is tested and listed to these
specifi cations.
• Appliance performance will suffer if specifi cations
are not followed.
CAUTION
C. Measuring Standards
Vertical and horizontal measurements listed in the vent dia-
grams were made using the following standards.
• Pipe measurements are shown using the effective length
of pipe (see Figure 5.2).
• Measurements are made from the appliance outer wrap,
not from the standoffs.
• Horizontal terminations are measured to the outside
mounting surface (flange of termination cap) (see
Figure 4.1).
• Vertical terminations are measured to top of last pipe
before termination cap.
• Horizontal pipe installed level with no rise.
Horizontal
Vertical
8-1/2 in.
8-1/2 in.
12 in.
Figure 5.1 Using Two 45° Elbows
Effective
Length
DVP Pipe
(see chart)
Effective
Pipe Length in inches
DVP4 4
DVP6 6
DVP12 12
DVP24 24
DVP36 36
DVP48 48
DVP6A 3 to 6
DVP12A 3 to 12
DVP12MI 3 to 12
DVP24MI 3 to 24
Figure 5.2 DVP Pipe Effective Length
5
Vent Information and Diagrams
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