Heatilator • Eclipse • 4049-229 Rev F • 11/0824
Horizontal
Vertical
8-1/2 in.
8-1/2 in.
12 in.
On 45° runs, 1 ft (.3 m) of diagonal is equal to 8-1/2 in. (216
mm) horizontal run and 8-1/2 in. (216 mm) vertical run.

A. Approved Pipe

This appliance is approved for use with Hearth & Home
Technologies SLP venting systems. 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 appliance
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 Using Two 45° Elbows
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).
• Measurements are made from the appliance outer wrap,
not from the standoffs.
• Horizontal terminations are measured to the outside
mounting surface (fl ange of termination cap) (refer to
Figure 6.2).
• Vertical terminations are measured to bottom of
termination cap.
• Horizontal pipe installed level with no rise.
Figure 7.2 Pipe Effective 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
SLP Pipe
(see chart)
Pi
p
einches mm
SLP4 4 102
SLP6 6 152
SLP12 12 305
SLP24 24 610
SLP36 36 914
SLP48 48 1219
SLP6A 2- 6 51- 152
SLP12A 2- 12 51 - 305
EffectiveHeight/Length
Effective
Height/Length