With a single fan design, this PANASONIC bathroom fan features the Pick-A-Flow speed selector that allows you to choose your desired CFM. Together with Smart Flow technology, the Pick-A-Flow feature helps ensure optimum CFM performance. Model is powerful, quiet, and ideal for new construction or replacement applications. UL Listed for use over a tub/shower enclosure when used with a GFCI protected circuit. Can be used to comply with ASHRAE 62.2, LEED, IAP, California Title 24 and WA Ventilation Code. Bathroom Fan, CFM @ 0.100-In. SP 110/130/150, Sons @ 0.100-In. SP @ 5 Ft. 0.3, 0.3, 0.3, Duct Dia. 4 In. or 6 In., Vertical Discharge, Voltage 120V, Lighted No, Night-Light No, 60 Hz, 1 Phase, Heater No, 0.12, 0.16, 0.19 Amps, Watts 6.8, 9.0, 11.8, Nominal RPM 636, 671, 698, Grille Length 13 In., Grille Width 13 In., Housing Height 7-1/2 In., Housing Length 10-1/4 In., Housing Width 10-1/4 In., Housing Material 26 gab Zinc-Aluminum-Magnesium Alloy, Mounting Location Ceiling, Number of Speeds 3