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84502-C
ALL COMBUSTION AIR FROM ADJACENT
INDOOR SPACES THROUGH INDOOR
COMBUSTION AIR OPENINGS.
Fig. A-1
Fig. A-3
Fig. A-2
Fig. A-4
ALL COMBUSTION AIR FROM OUTDOORS
THROUGH VENTILATED ATTIC.
ALL COMBUSTION AIR FROM OUTDOORS. INLET
AIR FROM VENTILATED CRAWL SPACE AND
OUTLET AIR TO VENTILATED ATTIC.
ALL COMBUSTION AIR FROM OUTDOORS
THROUGH SINGLE COMBUSTION AIR OPENING.
UL Listed Vent Cap
UL Listed Gas Vent
Opening
Opening
COMBUSTION AND VENTILATION AIR
UL Listed Vent Cap
UL Listed Gas Vent
Ventilation
louvers for unheated crawl space
Outlet Air
Ventilation Louvers
(each end of attic)
Inlet Air
UL Listed Vent Cap
UL Listed Gas Vent
Ventilation Louvers
(each end of attic)
Outlet Air
Inlet Air Duct
(Ends 1 ft. [300mm]
above floor)
Inlet
Grille
Inlet
Grille
UL Listed Vent Cap
UL Listed Gas Vent
Opening
Alternate
Opening
Location
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