Direct Vent - Vertical
Note: When vertical height exceeds 25 ft, consult
factory prior to installation.
*Requires optional vent tee if vented horizontally out back of heater.
Fig. 44: Direct Vent - Vertical
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| Certified |
| Vertical Venting | Combustion Air | Air Inlet |
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| Model | Venting | Vent Size | Height* | Intake Pipe | Max. Length** |
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| Material |
| Min. | Max. | Material | 10” | 12” |
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| 992BE |
| 10” |
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| 75’ | 100’ |
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| 1262BE |
| 12” |
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| Galvanized Steel, |
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| 1532BE |
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| Category II |
| 5’ | 25’ | PVC, |
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| 1802BE |
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| or IV | 14” |
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| ABS, |
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| 2002BE |
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| CPVC | 40’ | 75’ |
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| 2072BE |
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| 2342BE |
| 16” |
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*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.
Table R: Category II or IV Vertical Venting
49
