For additional air heating. The heater can also be used as a preheating device for outdoor air before the unit, or as an additional supply air heater, in case of insufficient power of the built-in air heater.

Casing and switching panel of the air heater are made of galvanized steel sheet. Terminals are installed in the switching panel to ensure easy and fast connection of the heater.

The heating elements are made of stainless steel.