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49
Direct Vent - Vertical
Vertical Venting
Height*
Air Inlet
Max. Length**
Model
Certified
Venting
Material
Vent Size
Min. Max.
Combustion Air
Intake Pipe
Material
10” 12”
992BE 10”
1262BE
1532BE
12”
75’ 100’
1802BE
2002BE
2072BE
14”
2342BE
Category II
or IV
16”
5’ 25’
Galvanized Steel,
PVC,
ABS,
CPVC
40’ 75’
Note: When vertical height exceeds 25 ft, consult
factory prior to installation.
Fig. 45: Direct Vent - Vertical
Table R: Category II or IV Vertical Venting
* 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.
*Requires optional vent tee if vented horizontally out back of heater.