Desa FB32C installation manual AIR for, Ventilation AIR

AIR FOR	VENTILATION AIR
COMBUSTION	Ventilation Air From Inside Building
	This fresh air would come from an adjoining unconfined space. When ventilating to an
AND	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
VENTILATION	and 2, Figure 4). You can also remove door into adjoining room (see option 3, Figure 4).
Continued	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 ICON	G 001 WARNING
	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		Ventilation Grills
	Grills
	Into Adjoining	Or	Into Adjoining Room,
	Room,		Option 2
		Remove
	Option 1
		Door into
		Adjoining
		Room,
		Option
		3
			12"

Figure 4 - Ventilation Air from Inside Building

Ventilation Air From Outdoors

Provide extra fresh air by using ventilation grills or ducts. You must provide two perma- nent openings: one within 12" of the ceiling and one within 12" of the floor. Connect these items directly to the outdoors or spaces open to the outdoors. These spaces include attics and crawl spaces.

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

	Outlet	Ventilated
		Attic
	Air
Outlet
Air
			To Attic

Air		¢QQQQ,,,,¢¢¢	To
			Crawl
Inlet			Space
	Inlet Air	Ventilated
		Crawl Space
	Figure 5 - Ventilation Air from Outdoors			9

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