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Category III or IV Installation of Vent/Air Piping
26
000
Combustion
Air Inlet
To Drain
According to
Local Codes
Refer to Vent Manufacturer's
Recommended Clearances
Refer to Vent Manufacturer's
Recommended Spacing of Support
12” Min. Above
Grade or Projected
Snow Line
Hanger
Strap
12”
Max.
Elbow
Appliance
Adaptor
Condensate Drain
withTrap Loop
Termination -
Straight or Tee or Hood
with Bird Screen (s)
Thimble -
Seal Around
Thimble & pipe
with Silicone
Horizontal- Single Pipe
Fig. 17:
000
Combustion
Air Inlet
To Drain,
According to
Local Codes
Refer to Vent Manufacturer's
Recommended Clearances
Refer to Vent Manufacturer's
Recommended Spacing of Support
Hanger
Strap
Elbow
Appliance
Adaptor
Condensate Drain
withTrap Loop
Termination -
Elbow or
Elbow with Straight
with Bird Screen
24” Max.
12” Min. & 36 “ Max.
Above Grade or
Projected Snow Line
Thimble -
Seal Around
Thimble &
Pipe with
Silicone
36”
Max.
Horizontal- Single Pipe snorkel
Fig. 17A: