DL 40 compact control for controlling up to six, with an extension set up to 18 DL 40 Air Units. The air volume flow can be controlled with five power levels. The comfort modes 'heat recovery' and 'cross ventilation' can be set, as can a sleep timer. Filter changes and faults are shown on the status display. Mains voltage 230V/50Hz with output 12V for the power supply of the DL 40 Air Units.
