Since 1958, King electric heaters have been manufactured in Seattle, Washington (with US & Global Materials). We believe 60 years of experience matters. The premier North American manufacturer of Industrial, Commercial and Residential Electric Heaters and Thermostats, Hydronic Heaters, Electric Heating Cables and Accessories– making us a one-stop solutions provider. We build smarter, more reliable and efficient electric heating products that offer an unparalleled user experience of temperature control, while reducing energy waste. Now That’s Smart!