Desa GVR50BPA, GVR65PA, GVR50PA, GVR65BPA, GVR35PA Air For, Ventilation, Combustion, Continued

AIR FOR	Draft Hood Spillage: This is a hazardous situation. Draft hood spillage re-
COMBUSTION	leases poisonous carbon monoxide gas into your home.
					WARNING ICONG 001DANGER
AND
		Carbon monoxide poisoning may lead to death!
VENTILATION
	If draft hood spillage occurs, check for blocked flue connectors, vent pipes, and
Continued
	chimneys. If you find blockage, remove. Test again for spillage. If spillage still
	occurs or there was no blockage, you need more fresh, outside air in the house. You
	must provide additional fresh-air ventilation. Follow the steps below at once.
	A. Open a window near the appliance(s) at least two inches. Test again for
		spillage. If spillage does not stop, open window more and retest. If spillage
		stops, keep window open while running appliance(s). Supply fresh, outside
		air by a permanent method as soon as possible. If spillage still occurs, leave
		window open and go to next step.
	B. If you have a fireplace, open a window or door near it at least two inches.
		Test again for spillage. If spillage does not stop, open window or door more
		and retest. If spillage stops, keep window or door open while using fire-
		place. Supply fresh, outside air by a permanent method as soon as possible.
		If spillage still occurs, leave window or door open and go to next step.
	C. If you have kitchen and bathroom exhaust fans, turn them off. Test again for
		spillage. If spillage stops, do not use exhaust fans. Turn off circuit breakers for
		fans if possible. Permanently supply fresh, outside air as soon as possible.
	Providing Permanent Fresh-Air Ventilation
	If draft hood spillage occurs, you must permanently supply fresh, outside air to the
	inside of your house. Provide extra fresh air by using ventilation grills or ducts.
	Connect these items directly to the outdoors or spaces open to the outdoors. These
	spaces include attics and crawl spaces. If you install this heater in an area with
	other gas appliances, you must total the BTU/Hr input rating of all appliances.
	Follow the National Fuel Gas Code NFPA 54/ANSI Z223.1. It lists fresh-air
	requirements for fuel-burning appliances.
					IMPORTANT
		Do not provide openings for inlet or outlet air into attic
		if attic has a thermostat controlled power vent.
			Chimney
			or Gas
			Vent	Outlet		Ventilated
						Attic
				Air
		Outlet
		Air
							To Attic

					To
					Crawl
Inlet					Space
Air
		Inlet Air		Ventilated		Continued
			Crawl Space
	Figure 15 - Ventilation Air from Outdoors
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