FRESH AIR |
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| WARNING ICONG 001 WARNING |
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FOR |
| This heater shall not be installed in a confined space unless |
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COMBUSTION |
| provisions are provided for adequate combustion and ventilation |
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| air. Read the following instructions to insure proper fresh air for |
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AND |
| this and other |
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VENTILATION | Today’s homes are built more energy efficient than ever. New materials, increased |
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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 continuous |
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| water vapor retarder with a rating of one perm |
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| less with openings 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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| Confined and Unconfined Space |
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| The National Fuel Gas Code (ANSIZ2123.1, 1992 Section 5.3) defines a confined |
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| space as a space whose volume is less than 50 cubic feet per 1,000 Btu per hour |
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| (4.8 m3 per kw) of the aggregate input rating of all appliances installed in that space |
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| and an unconfining space as a space whose volume is not less than 50 cubic feet per |
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| 1,000 Btu per hour (4.8 m3 per kw) of the aggregate input rating of all appliances |
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| installed in that space. Rooms communicating directly with the space in which the |
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| appliances are installed*, through openings not furnished with doors, are consid- |
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| ered a part of the unconfined space. |
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| * Adjoining rooms are communicating only if there are doorless passageways or |
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| ventilation grills between them. |
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| Continued | 5 |
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