Desa Comfort Glow CGD3930N Owner's Operation And Installation Manual

Also see for CGD3924NT: OWNER'S OPERATION AND INSTALLATION MANUAL

Desa Comfort Glow CGD3930N Owner's Operation And Installation Manual Manual pdf 5 page image

5102990AIR FORCOMBUSTIONANDVENTILATIONWARNINGThis heater shall not be installed in a confined space unlessprovisions are provided for adequate combustion and ventilationair. Read the following instructions to insure proper fresh air forthis and other fuel-burning appliances in your home.Today’s homes are built more energy efficient than ever. New materials, increasedinsulation, and new construction methods help reduce heat loss in homes. Homeowners weather strip and caulk around windows and doors to keep the cold air outand the warm air in. During heating months, home owners want their homes asairtight as possible.While it is good to make your home energy efficient, your home needs to breathe.Fresh air must enter your home. All fuel-burning appliances need fresh air forproper combustion and ventilation.Exhaust fans, fireplaces, clothes dryers, and fuel burning appliances draw air fromthe house to operate. You must provide adequate fresh air for these appliances.This will insure proper venting of vented fuel-burning appliances.ContinuedUnconfined SpaceThe National Fuel Gas Code, ANSIZ223.1, 1992, Section 5.3 defines uncon-fined space as having a minimum air volume of 50 cubic feet (127 cubic cm) foreach 1000 Btu/Hr input rating of all appliances in the space (cubic feet equalslength x width x height of space). Include adjoining rooms only if there aredoorless passageways or ventilation grills between the rooms.Confined SpaceThe National Fuel Gas Code, ANSIZ223.1, 1992, Section 5.3 defines confinedspace as having an air volume of less than 50 cubic feet (127 cubic cm) for each1000 Btu/Hr input rating of all appliances in the space (cubic feet equals lengthx width x height of space). Include adjoining rooms only if there are doorlesspassageways or ventilation grills between the rooms.PROVIDING ADEQUATE VENTILATIONThe following is exerpts from National Fuel Gas Code. NFPA 54/ANSI Z223.1,Section 5.3, Air for Combustion and Ventilation.All spaces in homes fall into one of the three following ventilation classifications:1. Unusually Tight Contruction; 2. Unconfined Space; 3. Confined Space.The information on pages 5 through 7 will help you classify your space and provideadequate ventilation.Unusually Tight ConstructionThe air that leaks around doors and windows may provide enough fresh air forcombustion and ventilation. However, in buildings of unusually tight construction,you must provide additional fresh air.Unusually tight construction is defined as construction where:a. walls and ceilings exposed to the outside atmosphere have a continu-ous water vapor retarder with a rating of one perm or less with open-ings gasketed or sealedandb. weather stripping has been added on openable windows and doorsandc. caulking or sealants are applied to areas such as joints around windowand door frames, between sole plates and floors, between wall-ceilingjoints, between wall panels, at penetrations for plumbing, electrical, andgas lines, and at other openings.If your home meets all of the three criteria above, you must provide addi-tional fresh air. SeeVentilation Air From Outdoors, page 7.If your home does not meet all of the three criteria above, proceed to page 6.