With the Whirlpool UXT4030ADS the time-consuming ways of installing hoods are now a thing of the past. The FIT system eliminates measuring, cutting and filler strips for a perfect fit every time. This air-recirculating hood eliminates the need for ducting outside the home and includes two fan speeds. When cooking introduces steam, grease, smoke and odors into the surrounding air, the effective charcoal filter takes care of it.