FIGURE2:BSI BOILERS-CLEARANCESTOALL
TYPESOFCOMBUSTIBLECONSTRUCTIONAND
NONCOMBUSTIBLE CEILINGS, WALLS, AND
DOORS.
4)Do not install this boiler in a location where gasoline or other flammable vapors or liquids will be stored or used. Do not install this boiler in an area where large amounts of airborne dust will be present, such as a workshop.
5)The boiler should be located as close to the chimney as possible.
6)Do not install this boiler directly on a surface that may get wet. Raise the boiler on a pad.
V Air for Combustion and Ventilation
Sufficient fresh air must be supplied for combustion, ventilation and flue gas dilution. Provisions for combustion, ventilation and flue gas dilution air for gas utilization equipment vented by natural draft must be made in accordance with local building codes or, in absence of such codes, in accordance with sections 5.3.3 and 5.3.4 (“Air for Combustion and Ventilation”) of the National Fuel Gas Code, NFPA 54/ANSI Z223.1.
To ensure an adequate supply of combustion, ventilation and flue gas dilution air supply, start by determining whether the boiler is to be installed in a building of unusually tight construction. A good definition of a building of unusually tight construction is one which has all of the following features:
•Walls and ceilings exposed to outside atmosphere have a continuous water vapor retarder with a rating of 1 perm or less with openings gasketed and sealed
•Weather stripping has been added on openable windows and doors
•Caulking and sealants are applied to areas such as joints around window and door frames, between sole plates and floors, between
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