Delta Performance PG-25 Installation And Maintenance Manual page 44

Venting and Combustion Air Installation
12" Recommended
minimum clearance
Location of Air Inlet
Not recommended for
Vertical Tee or Hooded
Vent Termination
Fig. 23: Location of Air Inlet Termination - Direct Vent Horizontal Separate (2 pipe) installations
Metal Plate
2" Min.
clearance
Anchored
fastners
Fig. 24A: Vent Termination Combustible
Wall
Vent Termination Tee
Air Inlet Elbow
Location of Air Inlet
Not recommended for
Horizontal Tee Vent
Termination or
horizontal/straight-out
screened termination
Caulk opening
Anchored fastners
Vent Termination
Flashing
12" Min.
recommended
to direct exhaust
away from wall
Grade level
Cement
mortar
seal
1" Min.
clearance
Fig. 24B: Vent Termination - Non-
Combustible Wall
37
Maximum 12"
Vent Termination
Maintain Distance as
Close to Outside Wall
as Possible
Combustion Air
Inlet
Caulk opening
Anchored fastners
Metal Plate
Vent Termination
Flashing
12" Min.
recommended
to direct exhaust
away from wall
Grade level