Broan 744 Recessed Bulb Fan and Light, 70 CFM 75-Watt 4-Inch round duct connector High efficiency centrifugal fan delivers 70 CFM, HVI-certified 1.5 Sones 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-Inch by 8-Inch ceiling joists with 4-Inch round duct connector Uses a 75-Watt bulb, either R30 or BR30 for standard applications and multiple units can easily be used in larger rooms