Table of Contents
Advertisement
Direct Vent - Vertical
Certified
Model
Venting
Material
302B
402B
502B
Category II
or IV
652B
752B
902B
* 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 for rear discharge.
Fig. 40: Direct Vent - Vertical
Vertical Venting
Height*
Vent Size
Min.
Max.
5"
6"
5'
8"
Table S: Category II or IV Vertical Venting
43
Combustion Air
Intake Pipe
Material
Galvanized Steel,
PVC,
25'
ABS,
CPVC
Air Inlet
Max. Length**
6"
8"
100'
N/A
75'
100'
40'
Advertisement
Table of Contents
