Alfresco 56 Inch Freestanding Grill with 770 sq. in. Grilling Surface, Three 27,500 BTU Main Burners, 20,000 BTU Side Burner, Integrated Rotisserie, Smoker and Herb Infuser System, 3-Position Warming Rack, Halogen Lighting and Nickel-Plated Knobs: Liquid Propane : Owner's Manual : Page 26