This 30 Inch AOG built-in natural gas grill features 304 series stainless construction with double walled lid, self-supporting installation hangers (eliminating the need for bottom support installation), 2 main 18-SR stainless U-burners producing 40,000 BTU, a 10,000 BTU infrared rear burner with rotis kit (with stainless 12-15 pound capacity motor), 28 inch x 18 inch (504 square inches) main grilling area, 28 inch x 5 inch (140 square inches) warming rack and a custom designed thermometer and electronic ignition. Includes propane orifices for easy conversion from natural gas to propane. Built-In opening required (in inches): 30 1/2 wide x 19 1/2 deep x 8 1/2 highClearance for lid: 1 1/2 inches. Converted propane units require a 1/2 in. Fitting, this fitting is standard.