Desa GA3700 Owner's Operation And Installation Manual

Also see for GA3555: Installation instructions

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Desa GA3700 Owner's Operation And Installation Manual Manual pdf 6 page image

www.desatech.com 113109-01G6WARNING: This heater shallnot be installed in a room orspace unless the required vol-ume of indoor combustion airis provided by the method de-scribed in the National Fuel GasCode, ANSI Z223.1/NFPA 54, theInternational Fuel Gas Code, orapplicable local codes. Read thefollowing instructions to insureproper fresh air for this andother fuel-burning appliancesin your home.Today’s homes are built more energy efficientthan ever. New materials, increased insulationand new construction methods help reduceheat loss in homes. Home owners weatherstrip and caulk around windows and doorsto keep the cold air out and the warm air in.During heating months, home owners wanttheir homes as airtight as possible.While it is good to make your home energy efficient,your home needs to breathe. Fresh air must enteryour home. All fuel-burning appliances need freshair for proper combustion and ventilation.Exhaust fans, fireplaces, clothes dryers andfuel burning appliances draw air from the houseto operate. You must provide adequate freshair for these appliances. This will insure properventing of vented fuel-burning appliances.pROvIDING ADEQUATEvENTILATIONThe following are excerpts from National FuelGas Code, ANSI Z223.1/NFPA 54, Air forCombustion and Ventilation.All spaces in homes fall into one of the threefollowing ventilation classifications:1. Unusually Tight Construction2. Unconfined Space3. Confined SpaceThe information on pages 6 through 8 will helpyou classify your space and provide adequateventilation.Unusually Tight ConstructionThe air that leaks around doors and windowsmay provide enough fresh air for combustionand ventilation. However, in buildings of un-usually tight construction, you must provideadditional fresh air.AIR FOR COMbUSTION AND VENTILATIONUnusually tight construction is defined asconstruction where:a. walls and ceilings exposed to the out-side atmosphere have a continuouswater vapor retarder with a rating ofone perm (6 x 10-11 kg per pa-sec-m2) orless with openings gasketed or sealedandb. weather stripping has been added onopenable windows and doors andc. caulking or sealants are applied toareas such as joints around windowand door frames, between sole platesand floors, between wall-ceiling joints,between wall panels, at penetrationsfor plumbing, electrical and gas linesand at other openings.If your home meets all of these three criteria,you must provide additional fresh air. SeeVentilation Air From Outdoors, page 7.If your home does not meet all of the threecriteria above, proceed to DeterminingFresh-Air Flow For Heater Location.Confined and Unconfined SpaceThe National Fuel Gas Code, ANSI Z223.1/NFPA 54 defines a confined space as a spacewhose volume is less than 50 cubic feet per1,000 Btu per hour (4.8 m3 per kw) of the ag-gregate input rating of all appliances installedin that space and an unconfined space as aspace whose volume is not less than 50 cubicfeet per 1,000 Btu per hour (4.8 m3 per kw)of the aggregate input rating of all appliancesinstalled in that space. Rooms communicatingdirectly with the space in which the appliancesare installed*, through openings not furnishedwith doors, are considered a part of the un-confined space.* Adjoining rooms are communicating only ifthere are doorless passageways or ventilationgrills between them.DETERMINING FRESH-AIR FLOWFOR HEATER LOCATIONDetermining if You Have a Confined orUnconfined SpaceUse this work sheet to determine if you havea confined or unconfined space.Space: Includes the room in which you willinstall fireplace plus any adjoining rooms withdoorless passageways or ventilation grillsbetween the rooms.