Open coil elements are the most efficient type of electric heating while at the same time, being the most economically feasible for most heating applications. Used predominantly in the duct heating industry, open coil elements have open circuits that heat air directly from the suspended resistive coils. Fast heat up time also improve efficiency while being designed for low maintenance and easily, inexpensive replacements parts. Dpstar also manufactures other industrial heating products such as infrared heaters, control panels, circulation heaters and more.