26 AMP 400-1000L I&O Manual
VII(continued)
4 Pipe Diameters min.
12 in. min.
Above Snow Line
Grade/Snow Line
Bird Screen
Vent & Intake
Vent
Combustion
Air
12 in. Min.
Above Snow Line
24 in. Min.
From Intake
6 Pipe Diameters Min.
Bird Screen
Vent & Intake
Vent
Combustion
Air
24 in. Min.
Above Intake
12 in. Min.
Above Roof/Snow Line
From Parapet
6 Pipe Diameters Min.
Above Parapet
24 in. Min.
From Parapet
Bird Screen
Vent & Intake
I
WARNING WARNING