ZIEHL-ABEGG has developed a range of different of potentiometers for actuating EC fans and control units. The desired resistance value can be set accurately, quickly and easily using the rotary knob. ZIEHL-ABEGG potentiometers are available in stepless and multi-step versions. Depending on the design, wall mounting can be carried out by way of surface mounting or in existing in-wall boxes. ZIEHL-ABEGG potentiometers are supplied with a 10 V voltage from the EC fan or control unit and deliver a control voltage of 0–10 V depending on the rotary knob setting. ZIEHL-ABEGG provides EC fans and control technology from a single source. The components are matched to one another and suitable for diverse application requirements.