UNCONFINED SPACE
UNUSUALLY TIGHT CONSTRUCTION
CONFINED SPACE
FRESH AIR OPENINGS FOR CONFINED SPACES
OUTDOOR AIR THROUGH TWO OPENINGS
FIGURE 11.
DIRECT VENT APPLIANCES
EXHAUST FANS
LOUVERS AND GRILLES
VENTING INSTALLATION
OUTDOOR AIR THROUGH ONE OPENING
16
2
2
FIGURE 12.