Power: Fire retardant Balanced Dual Centrifugal Blowers for Quiet Power. Performance: From 200 CFM up to 740 CFM at High. Sound: Sones range from 1.6 at low up to 4.6 at full power. Controls: Variable switches for full control of both Power and Light. Remote: Units can be ordered with remote wall switch capability. Dual Lighting: Single Spot Light using 50 Watt Halogen bulb and Recessed lighting using 75 Watt Incandescent bulbs positioned behind the filters. 30" Width uses Two recessed bulbs, 36" width and above uses Four recessed bulbs. Bulbs not included. Heat Sensor: Includes Fire Safety Thermostat that will turn unit on when temperature reaches 130 degrees. Electrical: 115 AC, 60 Hz, 9 Amps. Ducting: Single 7" round top vent. Exclusive Automatic Seal vent collar standard on all models. Damper: Built-in Back Draft damper is standard on all models. Mounting: Suggested distance between the cooking surface and the bottom of the hood is 36". Install: Alignment kit included for use in blind installation situations. Flange: Optional flange can be ordered to insure a perfect fit. Warranty: Limited Five Year In Home Warranty covering Parts and Labor. Grill: Not intended for use over a Bar-B-Que grill.