For nearly 50 years, Panasonic has delighted American consumers with innovations for the home and business. Panasonic's consumer electronics and technology has a wide range of award-winning products. Panasonic FV-08VQ5 WhisperCeiling 80 CFM Ceiling Mounted Fan is a ventilating fan that shall be Low Noise mount type rated for continuous run. This fan is energy star rated and certified by the Home Ventilation Institute (HVI). Evaluated by Underwriters laboratories and conform to both UL and cUL safety standards. The motor/blower for this ventilation fan is UL listed for tub/shower enclosure when used with a GFCI branch circuit wiring. It has four-pole totally enclosed condenser motor rated for continuous run and has a removable with permanently lubricated plug-in motor. The housing for the fan is built in backdraft damper, and has an expandable extension bracket up to 24 inches. Plus it has a double hanger bar system allowing for ideal positioning. This ventilating fan can be ran with no less then 80 CFM and no more than 0.3 sone as certified by the HVI at 0.1 static pressure in inches water gauge. This Panasonic ventilating fan has a user-friendly installation and is quiet enough you may not even know it is on. This fan is designed to give you continuous, trouble-free operation for many years thanks in part to its high-quality components and permanently lubricated motors which wear at a slower pace. It also has a lower operating temperature to improve the life of the motor and bearings. This Panasonic fan has a built-in damper to prevent backdraft, which helps to prevent outside air from coming through the fan.