Power: Single "Balanced" Centrifugal Blower. Performance: Up to 630 CFM at High. Sound: From 1.6 Sones on Low up to 4.6 on High. Controls: Variable for full control of both Power & Light. Lighting: Recessed using two to four 75 Watt Incandescent bulbs. Bulbs not included. Electrical: 115 AC, 60 Hz, 9 amps Filters: Dishwasher safe, full bottom coverage Aluminum Mesh filters for easy cleaning. Finish: 304 Stainless Steel, Bisquit, Powder Coating in Black or White. Install: Suggested distance between the cooking surface and the bottom of the hood is 30" to 36". Duct: Single 7" round, 4.25" off center to the left. Damper: Built-in Back Draft damper standard. Warranty: Limited Five Year In Home Warranty covering Parts & Labor.