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EDITION 1210-1212 M sleeping rooms are on an upper level,the detector shall be placed at the center of the ceiling directly above the stairway.All detectors shall be located in accordance with approved manufacturer's instructions. When actuated, the detector shall provide an alarm in the dwelling unit or guest room. When the valuation of an addition or repair to a Group R,Division 3 Occupancy exceeds$1,000.00,or when one or more sleeping rooms are added or created in existing Group R,Division 3 Occupancies,the entire building shall be provided with smoke detectors located as required for new Group R,Division 3 Occupan- cies. % In new construction, required smoke detectors shall receive their primary power from the building wiring when such wiring is served from a commercial source.Wiring shall be permanent and without a disconnecting switch other than those required for overcurrent protection.Smoke detectors may be battery oper- ated when installed in existing buildings, or in buildings without commercial - - — power,or in buildings which undergo alterations,repairs or additions regulated by the second paragraph of this section. A smoke detector shall be installed in the basement of dwelling units having a i stairway which opens from the basement into the dwelling.Such detector shall be connected to a sounding device or other detector to provide an alarm which will be audible in the sleeping area. (b)Sprinkler and Standpipe Systems.When required by other provisions of this code,automatic sprinkler systems and standpipes shall be installed as speci- fied in Chapter 38. Heating Sec.1211.Every dwelling unit and guest room shall be provided with heating facilities capable of maintaining a room temperature of 70°E at a point 3 feet above the floor in all habitable rooms. Special Hazards Sec.1212.Chimneys and heating apparatus shall conform to the requirements of Chapter 37 and the Mechanical Code. The storage and handling of gasoline,fuel oil or other flammable liquids in Division 1 Occupancies shall be in accordance with the Fire Code. In Division 1 Occupancies,doors leading into rooms in which Class I flamma- ble liquids are stored or used shall be protected by a fire assembly having a one- hour fire-protection rating.Such fire assembly shall be self-closing and shall be posted with a sign on each side of the door in 1-inch block letters stating:FIRE DOOR—KEEP CLOSED. Every room containing a boiler,central heating plant or hot-water supply boiler in Division 1 Occupancies shall be separated from the rest of the building by not less than a one-hour fire-resistive occupancy separation. EXCEPTION:A separation shall not be required for such rooms with equipment serving only one dwelling unit. 75