New Buck Corporation 42ZCBB dimensions Ventilation Air From Outdoors

VENTILATION AIR FROM OUTDOORS

Provide extra fresh air by using ventilation grills or ducts. You must provide two permanent openings: one within 12" of the ceiling and one within 12" of the floor. Connect these items directly to the outdoors. These spaces include attics and crawl spaces. Follow the National Fuel Gas Code NFPA 54/ANSI Z223.1, Section 4.3, “Air For Combustion and Ventilation” for required size of ventilation grills or ducts.

IMPORTANT: Do not provide openings for inlet air into attic if attic has a thermostat-controlled power vent. Heated air entering the attic will activate the power unit.

Ventilated Attic

Outlet Air

Outlet Air	To Attic
	To
	Crawl
Inlet Air	Space
Inlet Air	Ventilated
	Crawl Space

Figure 7 Ventilation Air From Outdoors

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