Heavy-duty u-bend metal sheath heating elements. Electric heaters convert energy to heat at 100% efficiency. UL listed and CSA registered models 2.0, 4.5, 6.0 & 13.5 Kw heat outputs available. Voltages include 208, 240, 277, 480 & 600. Single or three phase operation. Heater has gasketed wiring compartment that allows units for wash down. Optional safety grilles are available.