Ventilation AIR, Ventilation Air From Outdoors

AIR FOR COMBUSTION AND VENTILATION

Continued

WARNING

WARNING ICON

G 001

If the area in which the heater may be operated is smaller than that defined as an unconfined space, provide adequate combus- tion and ventilation air by one of the methods described in the National Fuel Gas Code, ANSI Z223.1, 1992, Section 5.3.

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 3). You can also remove door into adjoining room (see option 3, Figure 3). 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

WARNING ICON

G 001

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.

Ventilation

Grills

Into Adjoining

12"

Ventilation Grills

Into Adjoining Room,

Room,

Option 2

Option 1

Remove

Door into Adjoining Room, Option 3

12"

Figure 3 - 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
	Outlet	Attic
	Air	Attic
	Air
Outlet
Outlet
Air
			To Attic

Air			,,,,QQQQ¢¢¢¢	To
				Crawl
Inlet				Space
Inlet
		Inlet Air	Ventilated
		Inlet Air	Crawl Space
			Crawl Space
	Figure 4 - Ventilation Air from Outdoors

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FPVF33PR specifications

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Desa FPVF33PR installation manual Ventilation AIR, Ventilation Air From Inside Building

Models: FPVF33PR