Raypak HIDELTA 992B Installation & Operating Instructions Manual page 49

Direct Vent - Vertical
Certified
Model Venting
Material
992BE
1262BE
1532BE
Category II
1802BE
2002BE
2072BE
2342BE
* Vent lengths are based on a lateral length of 2 ft. Refer to the latest edition of the NFGC for further details.
When vertical height exceeds 25 ft, consult factory prior to installation.
** Subtract 10 ft per elbow. Max. 3 elbows.
Maximum combustion air duct length terminated at 100 equivalent ft.
Note: When vertical height exceeds 25 ft, consult
factory prior to installation.
*
Requires optional vent tee if vented horizontally out back of heater.
Fig. 45: Direct Vent - Vertical
Vertical Venting
Vent Size
Min.
10"
12"
or IV
14"
16"
Table R: Category II or IV Vertical Venting
Combustion Air
Height*
Intake Pipe
Material
Max.
Galvanized Steel,
PVC,
5' 25'
ABS,
CPVC
49
Air Inlet
Max. Length**
10" 12"
75' 100'
40' 75'