Installation Guide

507052-04 Page 17 of 53Issue 1727
Use the following steps to correctly size vent pipe diameter.
Figure 22.
045, 070,
090, 110
Standard or
Concentric?
See Table 5
Intake or
Exhaust?
2”, 2-1/2”
or 3”
Furnace capacity?
1
Which termination?
2
Which needs most
elbows?
3
How many?
4
Desired pipe size?
5
What is the altitude?
6
Use Table 7 to find
max pipe length.
7