22 ga. epoxy steel case. – Aluminum finned heating element. – Automatic temperature control thermostat.1,706 BTU.Overall Height – Top to Bottom: 5.75 Inches. – Overall Width – Side to Side: 20 Inches. – Overall Depth – Front to Back: 4 Inches. – Overall Product Weight: 5 Pounds. – Dimensions: 5.75″H X 20″W X 4″D Color: Aluminum.