19100792AIR FORCOMBUSTIONANDVENTILATIONContinuedFigure 15 - Ventilation Air from OutdoorsIMPORTANTDo not provide openings for inlet or outlet air into atticif attic has a thermostat controlled power vent.Chimneyor GasVent OutletAirVentilatedAtticOutletAirInletAirInlet Air VentilatedCrawl SpaceToCrawlSpaceTo AtticContinuedDraft Hood Spillage: This is a hazardous situation. Draft hood spillage re-leases poisonous carbon monoxide gas into your home.WARNING ICON G 001 DANGERCarbon monoxide poisoning may lead to death!If draft hood spillage occurs, check for blocked flue connectors, vent pipes, andchimneys. If you find blockage, remove. Test again for spillage. If spillage stilloccurs or there was no blockage, you need more fresh, outside air in the house. Youmust 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 forspillage. If spillage does not stop, open window more and retest. If spillagestops, keep window open while running appliance(s). Supply fresh, outsideair by a permanent method as soon as possible. If spillage still occurs, leavewindow 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 moreand 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 forspillage. If spillage stops, do not use exhaust fans. Turn off circuit breakers forfans if possible. Permanently supply fresh, outside air as soon as possible.Providing Permanent Fresh-Air VentilationIf draft hood spillage occurs, you must permanently supply fresh, outside air to theinside 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. Thesespaces include attics and crawl spaces. If you install this heater in an area withother 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-airrequirements for fuel-burning appliances.