Which control feature is essential for sauna heaters as part of the safety regulations?

The essential control feature for sauna heaters, in accordance with safety regulations, is the temperature limiting thermostat. This component is crucial for ensuring that the sauna operates within safe temperature limits. The thermostat monitors the heat levels and automatically adjusts the operation of the heater to prevent the temperature from exceeding predetermined safety thresholds.

By incorporating a temperature limiting thermostat, a sauna can protect users from excessive heat exposure, which can lead to severe health risks, including heat stroke or burns. This feature is integral to the safe operation of sauna heaters and supports compliance with safety standards established in the International Mechanical Code.

While features like automatic shut-off and overheat protection are important for safety, they typically act as secondary measures that activate during malfunction scenarios. Regular inspections, meanwhile, ensure ongoing safety and performance but do not directly control the heater's operation. The temperature limiting thermostat stands out as a proactive feature specifically designed to maintain safe conditions during sauna use.