Model
Appliance
No.
Category
HD101
HD151
HD201
III
HD251
HD301
HD401
Fig. 20: Direct Vent Horizontal Thru-Wall Venting (Category III)
Certified
Vent Size
Venting
(inches)
Material
4
Stainless
Steel
5
(Gas Tight)
6
Table L: Horizontal Thru-Wall Venting
Max.
Combustion
Venting
Air Intake
Length
Pipe
(feet)
Material
Galvanized
100,
Steel
4 Elbows
PVC
Max.
ABS
CPVC
29
Max. Air
Air Inlet
Intake
Size
Length
(inches)
(feet)
4
100