The production sites for fuel operated heaters and electrical heaters are located in Germany, England, Poland and China, for thermal management systems in Germany, Poland, Brazil, India and Mexico.

In a diesel air heater, the air for the heater's internal combustion process is drawn from an external intake pipe. It is then passed into the heater's combustion chamber where it is mixed with the diesel and automatically ignited to heat up the large surface area of a heat exchanger.

Alpine mode allows you to reduce the amount of fuel used to compensate for thinner air at higher altitude. To turn on Alpine mode, simply locate the Settings and OK buttons on the left hand side of the unit and hold them down until a mountain icon appears at the top. Turning this mode off is the same as turning it on.