Desa CGS2718N installation manual Ventilation AIR, Ventilation Air From Inside Building

AIR FOR	WARNING
COMBUSTION
	If the area in which the heater may be operated is smaller than that
AND	defined as an unconfined space, provide adequate combustion and
	ventilation air by one of the methods described in the National Fuel
VENTILATION
	Gas Code, ANSI Z223.1, 1992, Section 5.3 or applicable local codes.
Continued	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

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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