Heatilator • GDST4336I, GDFL4136I, GDCR4136I, GDCL4136I • 2129-900 Rev. F • 11/0826

A. Approved Pipe

This appliance is approved for use with Hearth & Home
Technologies a DVP venting system. Refer to Section
16B for vent component information.
DO NOT mix pipe, fi ttings or joining methods from differ-
ent manufacturers.
The pipe is tested to be run inside an enclosed wall.
There is no requirement for inspection openings at each
joint within the wall.
WARNING! Risk of Fire or Asphyxiation. This appli-
ance requires a separate vent. DO NOT vent to a pipe
serving a separate solid fuel burning appliance.

C. Use of Elbows

Diagonal runs have both vertical and horizontal vent as-
pects when calculating the effects. Use the rise for the
vertical aspect and the run for the horizontal aspect (see
Figure 7.1).
Two 45º elbows may be used in place of one 90º elbow.
On 45º runs, one foot of diagonal is equal to 8-1/2 in. (216
mm) horizontal run and 8-1/2 in. (216 mm) vertical run. A
length of straight pipe is allowed between two 45º elbows
(see Figure 7.1).
Figure 7.1
7
7 Vent Information and Diagrams

B. Vent Table Key

The abbreviations listed in this vent table key are used in
the vent diagrams.

D. Measuring Standards

Vertical and horizontal measurements listed in the vent
diagrams were made using the following standards.
• Pipe measurements are shown using the effective length
of pipe (see Figure 7.2).
• Horizontal terminations are measured to the outside
mounting surface (fl ange of termination cap) (see Figure
6.1).
• Vertical terminations are measured to bottom of
termination cap.
• Horizontal pipe installed level with no rise.
Figure 7.2 DVP Pipe Effective Length
Effective
Height/Length
Symbol Description
V1First section (closest to appliance) of vertical length
V2Second section of vertical length
H1First section (closest to appliance) of horizontal length
H2Subsequent sections of horizontal length
Horizontal
Vertica l
8-1/2 in.
8-1/2 in.
12 in.
Pipe Effective Length
Inches Millimeters
DVP4 4 102
DVP6 6 152
DVP12 12 305
DVP24 24 610
DVP36 36 914
DVP48 48 1219
DVP6A 3 to 6 76 to 152
DVP12A 3 to 12 76 to 305
DVP12MI 3 to 12 76 to 305
DVP24MI 3 to 24 76 to 610