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27Heatilator • GDST3831I • 2127-900 Rev. K • 7/12
Figure 7.5
Two Elbows
V
1
Minimum** H
1
+ H
2
Maximum
90 Elbow** 1/2 ft. 152 mm
1/2 ft.** 152 mm 1 ft. 305 mm
1-1/2 ft.** 457 mm 2 ft. 610 mm
2-1/2 ft.** 762 mm 4 ft. 1.2 m
3-1/2 ft. 1.1 m 6 ft. 1.8 m
4-1/2 ft. 1.4 m 14 ft. 4.3 m
H
1
+ H
2
Max. =14 ft. (4.3 m)
V
1
+ H
1
+ H
2
Max. = 40 ft. (12.2 m)
See Warning**
1. Top Vent - Horizontal Termination - (continued)
INSTALLED
HORIZONTALLY
H
1
H
2
V
1
Note: There MUST be a 25%
reduction in total H when using
fl ex vent except when using the
simple up and out installation
(see Figure 7.3).
WARNING**
Fire Risk.
• When using SLP-HRC-SS and SLP-HRC-ZC-SS
termination caps on top vented fi replaces, a one
foot minimum vertical vent section is required before
installing fi rst elbow.
• When using DVP-TB1 termination cap on top vented
fi replaces, a three foot minimum vertical vent section
is required before installing fi rst elbow.
• When using any other cap, a section of vertical pipe (12 inches
minimum) MUST be installed prior to attaching a 90° elbow.