Efficiently cook while maintaining great air quality in your home with this KitchenAid(R) wall-mounted hood. Perimeter ventilation pulls air from the edges of the hood. This allows the 400 CFM motor to provide effective ventilation over cooking surfaces with burners that can reach a maximum output of 65K BTUs. Auto speed sensing takes efficiency to the next level by ensuring smoke, grease, and moisture are not trapped in your kitchen. This device features the Whisper Quiet operation, which emits only 39 dBA at a slow speed. In addition, it converts from a traditional set-up to an in-line blower installation for an even more quiet operation (metal box purchase required).