Desa RFP28TB Ventilation Air, If the area in which the heater may be operated is smaller than

AIR FOR		WARNING ICONG 001WARNING
COMBUSTION
		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.
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 8). You can also remove door into adjoining room (see option 3, Figure 8). 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 Grills
Ventilation	Into Adjoining Room,
	Option 2
Grills	Or
into Adjoining	Remove
Room,	Door into
Option 1	Adjoining
	Room,
	Option 3

12"

Figure 8 - Ventilation Air from Inside Building

10

101935