VENTILATION AIR
VENTILATION AIR FROM INSIDE BUILDING
This fresh air would come from an adjoining unconfined space. When ventilating to an adjoin- ing 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 6). You can also remove door into adjoining room (See option 3, Figure 6).
NOTE: Each opening shall have a minimum free area of 1 square inch per 1000 BTUs per hour of the total input rating of all gas utilization equipment in the confined space, but not less than 100 square inch.
Ventilation Grills Into Adjoin- ing Rooms, Option 1
Or remove the Door into Adjoin- ing Room, Option 3
12”OR 304.8MM
Ventilation Grills Into Adjoining Rooms, Option 2
12” or 305 MM
FIGURE 6
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