The Panasonic FV-01WS2 is a 10 CFM Bath Fan. It is from the WhisperSupply series. This is a low-noise wall-mounted ventilation fan rated for continuous operation. This is a filtered supply air solution that meets ASHRAE 62.2 requirements for make-up/supply air. It can be easily installed in new constructions or retrofits. Designed with an interior deflector that enhances airflow for improved Indoor Air Quality (IAQ) and works with a furnace blower to ensure Combustion Appliance Zone (CAZ) depressurization, this fan presents energy-efficiency and effective ventilation. It has a galvanized steel wall sleeve that includes an interstitial wall sleeve and exterior hood. The interior deflector grille is made of BS plastic and pushes air up and to the side of the interior wall. The exterior hood is made of Poly Pro UV resistant and includes a bird screen. The Panasonic FV-01WS2 WhisperSupply Fan fits a 4-1/2” to 6” thick wall and can extend up to 10” with additional ducting. For more information about its dimensions, please see the specification sheet. HVI-tested data show that this product can produce 10 CFM at less than 0.3 sones of noise, making it virtually noise-free. This Panasonic FV-01WS2 WhisperSupply Fan has been certified by the Home Ventilating Institute (HVI) to be Energy Star-rated .It has been evaluated by the Underwriters Laboratories to conform to both UL and cUL safety standards. Has a 3-year warranty from the original date of the purchase. This is an American-made product that we are proud to provide to our customers.