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Resumen del manual
Modern construction standards have resulted in homes that are highly energy-efficient and that allow little heat loss. Your home needs to breathe, however, and all fuel-burning appliances need fresh air to function properly and safely. Exhaust fans, clothes dryers, fireplaces and other fuel burning appliances use the air inside the building. If the available fresh air supply is insufficient to meet the demands of these appliances, problems can result. The JUVS heater has specific fresh air requirements. You must determine that these requirements will be met within the space where the appliance will be installed. The following information will help you insure adequate fresh air is available for the heater to function properly. Provide for Adequate Ventilation Any space within a home can be classified in these categories: 1) Unusually tight construction 2) Confined space 3) Unconfined space First, determine which classification defines the intended installation space. Unusually Tight Construction You must provide additional fresh air if the space falls into this classification. Unusually Tight Constructionis defined as construction wherein: a. Walls and ceilings exposed to the outside atmosphere have a continuous water vapor barrier with a rating of one perm or less, with openings 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 windows and door frames, between sole plates and floors, between wall and ceiling joints, between wall panels, at penetrations for plumbing, electrical and gas lines and at all other openings. If your home meets all of the above criteria, you must provide additional fresh air for the appliance as detailed on Page 7. If your home does not meet the above criteria, follow the procedure below. Determine If You Have a Confined or Unconfined Space Use the following formula to determine if you have a confined or unconfined space. Spaceis defined as the room in which you will install the heater, plus any adjoining rooms with doorless passageways or ventilation grilles between the rooms. The National Fuel Gas Code defines a confined spaceas a space whose volume is less than 50 cubic feet per 1,000 BTU per hour input rating (4.8m3 per Kw) of the aggregate (total) input rating of all appliances installed in that space and an unconfined spaceas a space whose volume is not less than 50 cubic feet per 1,000 BTU per hour (4.8m3 per Kw) of the aggregate input rating of all appliances installed in that space. Rooms communicating directly with the space in which the appliances are installed, through openings not furnished with doors, are considered a part of the unconfined space. 1. Determine the volume of space (length x width x height). Include adjoining rooms connected by doorless passageways or ventilating grilles. Example: A room that is 18’ x 12’ x 8’ has a volume of 1728 cubic feet. An adjoining open kitchen that is 10’ x 12...
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