The Kw 4 ULT, 4kw Ultimate heats up to 200 cubic feet (length x width x height). Enjoy all Stainless Steel construction, Industrial low-density silver solder Incoloy elements and a 3 level adjustable rock tray. It?s Saunacore?s most option-packed heater. Saunacore heaters offer both outstanding safety and energy saving features, as well as sleek, high technology design. The innovative ventilation system allows these heaters to run up to 50 degrees cooler than most heating units on the market. Comes with Mercuri Digitial Wall Control at no additional charge. This heater is available in 240 volts. Includes Sauna Stones. Specifications: 240v/1ph, 16.7 Amps, 12 Gauge Wire ; Dimension: 15?w X 22?h X 10?d This product ships within 2 - 3 weeks from time of order.