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305, 505, 705 Indoor Manual 29
Vertical Terminations
The air intake requires a return bend or two 90º elbows to prevent entry of rain.
SLOPE INTAKE AND EXHAUST
TOWARD OUTSIDE TERMINATION
MINIMUM 1/4" PER FOOT
Horizontal with Concentric Termination
Flue Installation for the 705 Model
The vent termination and air intake must be in the same pressure zone.
12” MIN. ABOVE
GRADE OR
SNOW LEVEL
3”
MAX
12” MIN
12”
MIN
COMBUSTION
AIR PIPE
EXHAUST PIPE
ANTICIPATED
SNOW LEVEL
3”
3”
MAX
12” MIN
12” MIN
3”
MAX
12” MIN
12” MIN