The Panasonic FV-20VQ3 WhisperCeiling 190 CFM fan is a ceiling-mounted ventilation solution featuring a totally enclosed condenser motor and a double-tapered, dolphin shaped bladed blower wheel designed to quietly move a large volume of air. It operates at 190 CFM (cubic feet per minute) and a quiet 1.3 sones sound level, making it suitable for larger rooms up to 200 sq. ft. in both residential and light commercial applications. The fan has a galvanized steel housing with rust-proof paint treatment for durability and a 15-inch square polypropylene grille. It is ENERGY STAR certified, UL listed for use over a bathtub or shower when installed in a GFCI protected circuit, and can help comply with various building codes and standards like ASHRAE 62.2 and California Title 24. It uses a 6-inch duct adapter and operates on 120 volts