Power: Twin "Balanced" centrifugal blowers. Performance: 1300+ CFM up to 1500+ CFM. Sound: Up to 4.6 Sones on High. Controls: Variable for full control of both Power & Light. Dual Lighting: Uses two 50 watt Halogen Spot Lights and four 75 watt recessed incandescent 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. Filters: Dishwasher safe, full bottom coverage Aluminum Mesh Filters for easy cleaning. Install: Suggested distance between the cooking surface and the bottom of the hood is 36". Duct: Two 7" or 8" duct. Transitioning to a single duct will lower the CFM and void the warranty. Dampers: Built-in Back Draft Dampers Standard. Custom: Custom sizes available. Call with dimensions to determine if we can meet your needs. Warranty: Limited Five Year In Home Warranty covering Parts & Labor. Grill: There is no performance warranty when used over a Bar-B-Que Grill.