The Panasonic FV-05VFL4 Bathroom Fan perfectly combines quality, efficiency and technology making the perfect ventilation fan for any application. The Panasonic FV-05VFL4 Bathroom Fan features quiet operation as well as powerful performance that are achieved through the aerodynamic fan design. The new design utilizes a tapered Sirocco fan to deliver improved ventilation. The design and engineering improvements of the Panasonic FV-05VFL4 Bathroom Fan were made specifically to lower the already low sones levels. The Panasonic FV-05VFL4 Bathroom Fan features a low-profile housing that has a depth of just 5-5/8" allowing for easy installation just about anywhere. The Panasonic FV-05VFL3 Bathroom Fan can be easily installed in 2 x 6 or larger construction. The Panasonic FV-05VFL4 Bathroom Fan is ideal for remodeling and also manufactured structured homes. The Panasonic FV-05VFL4 Bathroom Fan also incorporates an overhead light as well. The light utilizes two 13W self-ballasted GU24 CFL lamps to brightly illuminate your bathroom. Also built in to the design of this great bathroom fan is a 4 watt nightlight that allows you to easily navigate your bathroom in the dark. The Panasonic FV-05VFL4 Bathroom Fan also offers easy, user friendly installation, and includes detachable 3" or 4" adaptors, firmly secured duct ends, mounting brackets that are adjustable up to 26", and a double hanger bar system for perfect positioning. The Panasonic FV-05VFL4 Bathroom Fan is also Energy Star qualified thanks to the super quiet operation and very high CFM to Watt efficiency. The Panasonic FV-05VFL4 Bathroom Fan also features a built-in damper to prevent backdraft. The built-in damper prevents the outside cold air from coming into your home through the fan.