Desa FB32C Providing Adequate Ventilation, Unusually Tight Construction, Unconfined Space

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AIR FOR COMBUSTION AND VENTILATION

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PROVIDING ADEQUATE VENTILATION

The 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 6 through 9 will help you classify your space and provide adequate ventilation.

Unusually Tight Construction

The air that leaks around doors and windows may provide enough fresh air for combustion 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 sealed and

b.weather stripping has been added on openable windows and doors and

c.caulking or sealants are applied to areas such as joints around window and door frames, between sole plates and floors, between wall-ceiling joints, between wall panels, at penetrations for plumbing, electrical, and gas lines, and at other openings.

If your home meets all of the three criteria above, you must provide addi- tional fresh air. See Ventilation Air From Outdoors, page 9.

If your home does not meet all of the three criteria above, proceed to page 8.

Unconfined Space

The National Fuel Gas Code, ANSIZ223.1, 1992, Section 5.3 defines unconfined space as having a minimum air volume of 50 cubic feet (127 cubic cm) for each 1000 Btu/Hr input rating of all appliances in the space (cubic feet equals length x width x height of space). Include adjoining rooms only if there are doorless passageways or ventilation grills between the rooms.

Confined Space

The National Fuel Gas Code, ANSIZ223.1, 1992, Section 5.3 defines confined space as having an air volume of less than 50 cubic feet (127 cubic cm) for each 1000 Btu/Hr input rating of all appliances in the space (cubic feet equals length x width x height of space). Include adjoining rooms only if there are doorless passageways or ventilation grills between the rooms.

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Contents
What to do if YOU Smell GAS OperationContents Safety Information 001 Product Specifications Local Codes Unpacking Operation Blower AccessoryPlanning Confined Space Providing Adequate VentilationUnusually Tight Construction Unconfined SpaceDetermining if You Have a Confined or Unconfined Space Determining AIR Flow for Firebox LocationVentilation AIR forVentilation AIR Installation Clearances InstallingMinimum Wall and Ceiling Clearances see , Minimum Clearance Mantel Clearances for Built-In InstallationConventional Installation of Blower Accessory Installing Blower Accessory Model FB32C onlyRemoving Firebox Bottom Installing LOG Heater in FireboxInstalling Fireplace Screen Installing Fireplace HoodPlacing Hearth Base Accessory Against Wall Firebox Installation Using Optional Accessory MantelsInstalling Cabinet Mantel BUILT-IN Firebox Installation InstallingRough Opening for Installing in Corner Parts Under Warranty Technical Service Replacement PartsParts Not Under Warranty GM400F Series Walnut Finished GM401U Series Unfinished AccessoriesGM100F Series Walnut Finished GM101U Series UnfinishedGM201U Series Unfinished ¢,,,, Qqqq ¢¢¢¢ , Q ¢Illustrated Parts Breakdown Firebox Parts ListModel FB32C Model FB32C 103296 103296 Keep this Warranty Warranty Information