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FRESH AIR |
| WARNING ICONG 001WARNING |
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| This heater shall not be installed in a confined space unless |
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FOR |
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| provisions are provided for adequate combustion and ventilation |
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COMBUSTION |
| air. Read the following instructions to insure proper fresh air for |
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| this and other |
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AND |
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Today’s homes are built more energy efficient than ever. New materials, increased |
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VENTILATION |
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insulation, and new construction methods help reduce heat loss in homes. Home |
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| owners weather strip and caulk around windows and doors to keep the cold air out |
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| and the warm air in. During heating months, home owners want their homes as |
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| airtight as possible. |
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| While it is good to make your home energy efficient, your home needs to breathe. |
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| Fresh air must enter your home. All |
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| proper combustion and ventilation. |
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| Exhaust fans, fireplaces, clothes dryers, and fuel burning appliances draw air from |
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| the house to operate. You must provide adequate fresh air for these appliances. |
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| This will insure proper venting of vented |
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| PROVIDING ADEQUATE VENTILATION |
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| The following is exerpts from National Fuel Gas Code. NFPA 54/ANSI Z223.1, |
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| Section 5.3, Air for Combustion and Ventilation. |
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| All spaces in homes fall into one of the three following ventilation classifications: |
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| 1. Unusually Tight Contruction; 2. Unconfined Space; 3. Confined Space. |
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| The information on pages 5 through 8 will help you classify your space and provide |
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| adequate ventilation. |
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| Unusually Tight Construction |
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| The air that leaks around doors and windows may provide enough fresh air for |
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| combustion and ventilation. However, in buildings of unusually tight construction, |
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| you must provide additional fresh air. |
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| Unusually tight construction is defined as construction where: |
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| a. walls and ceilings exposed to the outside atmosphere have a continu- |
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| ous water vapor retarder with a rating of one perm or less with open- |
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| ings gasketed or sealed and |
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| b. weather stripping has been added on openable windows and doors and |
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| c. caulking or sealants are applied to areas such as joints around window |
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| and door frames, between sole plates and floors, between |
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| joints, between wall panels, at penetrations for plumbing, electrical, and |
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| gas lines, and at other openings. |
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| If your home meets all of the three criteria above, you must provide addi- |
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| tional fresh air. See Ventilation Air From Outdoors, page 8. |
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| If your home does not meet all of the three criteria above, proceed to page 6. |
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| Unconfined Space |
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| The National Fuel Gas Code, ANSIZ223.1, 1992, Section 5.3 defines uncon- |
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| fined space as having a minimum air volume of 50 cubic feet (127 cubic cm) for |
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| each 1000 Btu/Hr input rating of all appliances in the space (cubic feet equals |
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| length x width x height of space). Include adjoining rooms only if there are |
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| doorless passageways or ventilation grills between the rooms. |
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| Confined Space |
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| The National Fuel Gas Code, ANSIZ223.1, 1992, Section 5.3 defines confined |
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| space as having an air volume of less than 50 cubic feet (127 cubic cm) for each |
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| 1000 Btu/Hr input rating of all appliances in the space (cubic feet equals length |
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| x width x height of space). Include adjoining rooms only if there are doorless |
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| passageways or ventilation grills between the rooms. |
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| Continued |
| 5 |
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