Lennox ELITE Series Installation Instructions Manual page 18

eter.
Piping Size Process
What is the
furnace capacity?
1
Which style termination
being used?
2
Standard or
concentric?.
Which needs
most elbows?
3
Intake or
exhaust?
How many elbows?
Count all elbows inside
4
and outside house.
Desired pipe size?
5
What is the altitude of
6
the furnace installation?
Find max intake or
exhaust pipe length.
7
Includes all vent pipe and
elbows inside and outside
the house.
Figure 24
-
Do not use screens or perforated metal in exhaust or
may block the terminations.
NOTE -
Page 18
IMPORTANT