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SYSTEM OPERATION
Combustion Air Pipe
COMBUSTION AIR INTAKE
(OPTIONAL)
*Not required for
single pipe installation
12" MIN TO ROOF OR HIGHEST
ANTICIPATED SNOW LEVEL
DOWN VENTING UPFLOW MODEL FURNACES ONLY
Field Supplied
Drain Tee on Vent Pipe
All piping and fittings must be joined per material manufacturers specifications
to prevent separation and flue gas leaks.
TEE (OPTIONAL)
12" MIN
HEIGHT DIFFERENCE
BETWEEN
INTAKE AND VENT
Figures 13
Use alternate vent
& combination
air locations
Vent Pipe
Floor
Condensate trapped
to prevent flue gas from escaping
and routed to field supplied
condensate disposal
Figure 12
6' Max.
1/4" per foot min.
slope to furnace
ELBOWS
STRAIGHT
Figure 14
19
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