It is a heat exchanger that works as a radiator with an active fan & 4 x ø60 mm air sleeves for even hot air distribution up to 4 rooms. It is possible to use air flow adapters to distribute hot air flow to more rooms (depends on size & insulation of room).

As this liquid heat exchanger can run independently without AUTOTERM Flow series heater tuned on, it can be used to circulate air in the room.

The heat exchanger can be connected with 4 air pipes (assy.DE013) for even air distribution. 

As an alternative, heat exchanger can be linked with engines coolant system instead of AUTOTERM Flow series heater.