| Model | Venting Category | Certified Venting | Vent Size (inches) | Maximum Vent |
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| UL 1738 Certified |
| 55 Subtract 10 ft per |
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| Venting Material e.g. |
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| IV | 8 | elbow, Max. 3 |
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| Steel PVC*, CPVC* |
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| UL 1738 Certified |
| 55 Subtract 10 ft per |
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| Venting Material e.g. |
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| IV | 10 | elbow, Max. 3 |
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| Steel PVC*, CPVC* |
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| UL 1738 Certified |
| 55 Subtract 10 ft per |
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| Venting Material e.g. |
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| IV | 12 | elbow, Max. 3 |
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| Steel PVC*, CPVC* |
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| *Contact the manufacturer for details. |
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| Table P: Horizontal |
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Horizontal
This installation utilize the boiler mounted blower to vent the combustion products to the outdoors. Combustion air is taken from inside the room and the vent is installed horizontally through the wall to the out- doors. Adequate combustion and ventilation air must be supplied to the boiler room in accordance with the National Fuel Gas Code or, in Canada, the latest edi- tion of CSA B149 Installation Code for Gas Burning Appliances and Equipment.
UL 1738 Certified Venting Material (e.g.
For certain installations, i.e. pool, heat pump, domes- tic hot water supply with
To prevent condensate accumulation in the vent, it is required to install the horizontal portion of vent with a slight upward slope of not more than 1/4" per foot of horizontal run and an approved condensate trap must be installed per applicable codes, so the condensation in the vent pipe drains back to the boiler.
WARNING: For common vent installations contact factory.
WARNING: No substitutions of flue pipe or vent cap material are allowed. Such substitutions would jeopardize the safety and health of inhabitants.
The Stainless Steel
36