TURKU TU45WD-I 4.5KW 240V RESIDENTIAL FIRMER BODY STRUCTURE WET or DRY ELECTRIC SAUNA SPA HEATER STOVE WITH BUILT-IN CONTROLLER. FOR TRADITIONAL SAUNAS ONLY- IS NOT COMPATIBLE WITH INFRARED SAUNAS STRUCTURE! TURKU SAUNA HEATER FEATURES: - Firmer body structure; - Aluminum thermostat sensor casing; Wet or Dry sauna use; - Water can be sprinkled on to the rock; - Long Life Heavy-Duty electric elements; - Vented body design provides fast warm-up - Direct rock contact with heating elements - BUILT-IN CONTROLLER FEATURES.... - Standard control for any sauna heater models; - Many sauna buyers prefer the built-in controls for its ease of wiring; - Built-in Controller located at the bottom of the heater; - Included Built-in time knob controller; - Included Built-in temperature knob controller; HIGH-TEMPERATURE CUT-OFF PROTECTION - OVERHEATING PROTECTION The temperature is controlled by the build-in thermostat sensor. However if for any reason the air temperature inside the heater rises to an abnormally high level the overheating protection automatically cuts off the power supply. When the heater has cooled down the power can be on again by pressing the reset button. Before pressing the reset button the possible cause of overheating should be investigated.