AIR FOR | Example 2: Locating Heater in Confined (Closed) Area | ||||
COMBUSTION |
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| NOTICE |
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AND |
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| A confined area has an air volume of less than 50 cubic |
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VENTILATION |
| feet for each 1000 BTU/Hr input rating of all appliances |
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| in the area (cubic feet equals length x width x height of |
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Continued |
| area). Include adjoining rooms only if there are no doors |
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| between the rooms. |
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| If you install this heater in a confined area, you must provide additional fresh air. | ||||
| Ventilating Confined Area | ||||
| This fresh air would come from an adjoining open area or outdoors. | ||||
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| WARNING ICONG 001 WARNING |
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| The adjoining open area must have enough fresh, |
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| outside air ventilation to supply any appliance in that |
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| area plus the confined area. Follow instructions under |
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| Example 1: Locating Heater in Unconfined (Open) Area, |
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| page 18 to make sure fresh air ventilation is adequate. |
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| When ventilating to an adjoining open area, you must provide two permanent | ||||
| openings: one within 12" of the ceiling and one within 12" of the floor on the wall | ||||
| connecting the two areas. Follow the National Fuel Gas Code NFPA 54/ANSI | ||||
| Z223.1. It lists | ||||
| 12" |
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Ventilation
Grills into
Closet for
Hot Water
Heater
Ventilation Grills
Connecting Two Rooms to Meet Unconfined Space
| 12" |
| Recommended |
| Fresh Air Duct |
| into Crawl Space in |
| Furnace Area or in |
| Closet with Water Heater |
| Figure 16 - Ventilation Air from Inside Building |
| After providing ventilation between rooms, check for draft hood spillage (see Draft |
| Hood Spillage Test, page 18). If draft hood spillage still occurs, provide more |
| ventilation between rooms or provide permanent ventilation from outdoors. See |
20 | Providing Permanent |
100793