TYPICAL USES£º ¡¡¡¡ Designed for high efficiency performance in furnace blowers. Also used for other shaft-mounted fan and blower equipment. Designed and built for exceptionally quiet operation of shaft-mounted blowers with 5" or 6" diameter wheel (single phase) and 9" or 10" diameter wheels (three phase). YS7112 :The blowers offer maximum efficiency and quiet air delivery. Widely used in heating, Ventilating, exhausting, cooling equipment, etc direct drive. FEATURES: Face mounting; Automatic reset thermal overload protector; Rated power supply: single phase or three phase; Degree of protection by enclosure: IP22; Insulation: class B¡¢F or H; Ambient temperature: max 90¡æ; Noise level: max 45 db; Relative humidity: 95; Continuous duty