Raypak HD401 Installation & Operating Instructions Manual page 29

Model Appliance
No. Category
HD101
HD151
HD201
III
HD251
HD301
HD401
Maximum 4 elbows, for either intake or vent.
Fig. 22: Direct Vent Horizontal Thru-wall Venting (Category III)
Certified
Vent Size
Venting
(inches)
Material
4
Stainless
Steel
5
(Gas Tight)
6
Table M: 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