Desa Comfort Glow CGG2618P Owner's Operation And Installation Manual

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Desa Comfort Glow CGG2618P Owner's Operation And Installation Manual Manual pdf 4 page image

4103425UNVENTED (VENT-FREE) GAS LOG HEATERAIR FORCOMBUSTION ANDVENTILATIONToday’s homes are built more energy efficientthan ever. New materials, increased insula-tion, and new construction methods help re-duce heat loss in homes. Home owners weatherstrip and caulk around windows and doors tokeep 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 energyefficient, your home needs to breathe. Freshair must enter your home. All fuel-burningappliances need fresh air for proper com-bustion and ventilation.Exhaust fans, fireplaces, clothes dryers, andfuel burning appliances draw air from thehouse to operate. You must provide ad-equate fresh air for these appliances. Thiswill insure proper venting of vented fuel-burning appliances.PROVIDING ADEQUATEVENTILATIONThe following are excerpts from NationalFuel Gas Code. NFPA 54/ANS Z223.1, Sec-tion 5.3, Air for Combustion 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 4 through 6 willhelp you classify your space and provideadequate ventilation.Unusually Tight ConstructionThe air that leaks around doors and win-dows may provide enough fresh air for com-bustion and ventilation. However, in build-ings of unusually tight construction, youmust provide additional fresh air.Unusually tight construction is de-fined as construction where:a. walls and ceilings exposed to theoutside atmosphere have acontinuous water vapor retarderwith a rating of one perm (6 x 10-11kg per pa-sec-m 2 ) or less withopenings gasketed or sealed andb. weather stripping has beenadded on openable windows anddoors andc. caulking or sealants are appliedto areas such as joints aroundwindow and door frames, be-tween sole plates and floors, be-tween wall-ceiling joints, betweenwall panels, at penetrations forplumbing, electrical, and gaslines, and at other openings.If your home meets all of the threecriteria above, you must provide ad-ditional fresh air. SeeVentilation AirFrom Outdoors, page 6.If your home does not meet all of thethree criteria above, proceed toDe-termining Fresh-Air Flow for HeaterLocation, page 5.Confined and Unconfined SpaceThe National Fuel Gas Code (ANS Z223.1,1992 Section 5.3) defines a confined spaceas a space whose volume is less than 50cubic feet per 1,000 Btu per hour (4.8 m 3 perkw) of the aggregate input rating of allappliances installed in that space and anunconfining space as a space whose volumeis not less than 50 cubic feet per 1,000 Btuper hour (4.8 m3 per kw) of the aggregateinput rating of all appliances installed in thatspace. Rooms communicating directly withthe space in which the appliances are in-stalled*, through openings not furnishedwith doors, are considered a part of theunconfined space.This heater shall not be installed in a con-fined space or unusually tight constructionunless provisions are provided for adequatecombustion and ventilation air.* Adjoining rooms are communicating onlyif there are doorless passageways or ventila-tion grills between them.WARNING: This heater shallnot be installed in a confined spaceor unusually tight constructionunless provisions are providedfor adequate combustion and ven-tilation air. Read the following in-structions to insure proper freshair for this and other fuel-burningappliances in your home.