AIR FOR | WARNING ICONG 001WARNING | |
COMBUSTION | ||
| ||
If the area in which the heater may be operated is smaller than | ||
AND | that defined as an unconfined space, provide adequate combus- | |
tion and ventilation air by one of the methods described in the | ||
VENTILATION | ||
National Fuel Gas Code, ANSI Z223.1, 1992, Section 5.3 or appli- | ||
Continued | cable local codes. | |
VENTILATION AIR | ||
| ||
| Ventilation Air From Inside Building | |
| This fresh air would come from an adjoining unconfined space. When ventilating to | |
| an adjoining unconfined space, 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 spaces | |
| (see options 1 and 2, Figure 4). You can also remove door into adjoining room (see | |
| option 3, Figure 4). Follow the National Fuel Gas Code NFPA 54/ANSI Z223.1, | |
| Section 5.3, Air for Combustion and Ventilation for required size of ventilation grills | |
| or ducts. | |
|
| |
| WARNING ICONG 001WARNING | |
| Rework worksheet, adding the space of the adjoining unconfined | |
| space. The combined spaces must have enough fresh air to supply all | |
| appliances in both spaces. | |
|
|
12"
| Ventilation Grills |
Ventilation | Into Adjoining Room, |
Option 2 | |
Grills | Or |
into Adjoining | Remove |
Room, | Door into |
Option 1 | Adjoining |
| Room, |
| Option 3 |
12"
Figure 4 - Ventilation Air from Inside Building Shown with Optional Mantel
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