With the KitchenAid KVWB400DSS you get 400 CFM for High air circulation, with Perimeter Ventilation that Increases ventilation system efficiency by pulling air from the edges of the hood and speeding up the movement of air at the center, allowing it to efficiently handle up to a 65K BTU total output. The 3 Speed Push-button controls make it easy to select and adjust fan speed depending on your ventilation requirements. LED Task Lights Provide extra lighting over the cooking surface to help in the cooking process.