Coasts sauna heater is reliable, economical, and durable. The heater will heat up according to the user pre set working timer and temperature by timer and thermostat. The factory default working time is 45 minutes. This heater is designed with a high temperature cut off safety device. When the room temperature is too high, it will automatically turn off. Enjoy the health benefits of your sauna including detoxification, fatigue elimination, and muscle relaxation with Coasts Sauna Heater. Reliable performance, energy saving, and terrific value.Due to the nature of the 220V-240V hardwired unit, an electrician is recommended upon installation.