Raypak HI DELTA HD101 Installation & Operating Instructions Manual page 30

Certified
Model Appliance
No. Category
HD101
HD151
HD201
I
Equivalent
HD251
HD301
HD401
*Over 25 feet, use single acting barometric damper. Consult the factory for additional information.
Fig. 21: Direct Vent—Vertical Venting (Category I)
Vent
Venting Height (feet)
Venting Size
Material (inches)
4
Type B
(HD201) 6
5 (HD251) 6
(HD301) 11
6
Table M: Vertical Venting
Combustion
Min./Max. Vertical
Min. Max.
6
25*
8
30
Air Inlet
Air Intake
Size
Pipe
(inches)
Material
Galvanized
Steel
PVC 4
ABS
CPVC
Max. Air
Intake
Length
(feet)
100