High efficiency centrifugal fan delivers 70 CFM. HVI-certified 1.5 Sones. Multiple units can easily be used in larger rooms. Uses a 75 watt bulb, either R30 or BR30 for standard applications. UL Listed for use over bathtubs and showers when connected to a GFCI protected branch circuit with PAR30L or PAR30LN type bulbs. 6 7/8 inch high housing appropriate for new construction and 2 x 8 inch ceiling joists. 4 inch round duct connector. Not for use over cooking surfaces. Optional wall control switches available. Install this unit in a flat ceiling only.