Desa SCIVFC, SCIVFB, SCIVFR, SCIVFG installation manual AIR for, Ventilation AIR

AIR FOR			WARNING
COMBUSTION		WARNING ICONG 001
	If the area in which the heater may be operated is smaller than
AND	that defined as an unconfined space, provide adequate combus-
	tion and ventilation air by one of the methods described in the
VENTILATION
	National Fuel Gas Code, ANSI Z223.1, 1992, Section 5.3 or appli-
Continued	cable local codes.
	VENTILATION AIR
	Ventilation Air From Inside Building
	This fresh air would come from an adjoining unconfined space. When ventilating to an
	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
	and 2, Figure 2). You can also remove door into adjoining room (see option 3, Figure 2).
	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 ICONG 001WARNING
	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 2 - 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

	To
	Crawl
Inlet	Space
Air
Inlet Air	Ventilated
	Crawl Space
Figure 3 - Ventilation Air from Outdoors		7

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