Generac 6242 17,000 Watt Air-Cooled Steel Enclosure Liquid Propane/Natural Gas Powered Standby Generator with 17 Circuit Transfer Switch (Discontinued by Manufacturer) Unit runs on natural gas or liquid propane and features hands-free operation with no fueling, no manual start and no extension cords Clean, smooth True Power Technology provides safe operation of sensitive electronics Includes automatic transfer switch with 17-circuits protected (NEMA 1, indoor rated only) 17,000 rated watts and this model is UL, CUL and EPA compliant for safety Comes with a 2-year limited warranty and is CARB Compliant