By having built-in thermostats, ratings of 10-1000W and voltages up to 440V can be realized by a controlled and low surface temperature ( e. g. 55°C). In the case of using these heaters as stationary heaters, there is no danger of burnings for the service technician.
The adjustment of the built-in thermostat is only factory-provided; thereby the heater can work reliably, also with customer-specific values or data.
These heaters are also available with UL-certification.