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IMPORTANT
Do not use screens or perforated metal in exhaust or
intake terminations. Doing so will cause freeze-ups and
may block the terminations.
Use Figure 24 to correctly size vent pipe diameter.
Furnace capacity?
1
Which termination?
2
Which needs most
3
elbows?
How many?
4
Desired pipe size?
5
What is the altitude?
6
Use Table 5 or
Table 6 to find max
7
pipe length.
Figure 24.
Page 18 of 55
030, 045,
070, 090,
110
Standard or
Concentric?
See Table 3
Intake or
Exhaust?
1-1/2",
2", 2-1/2"
or 3"
Issue 1922
507867-02
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