Exhaust air chimney MultiStep®

The energy-saving control principle using the CL 74 actuator MultiStep® combines stepless control and group control. The principle’s advantage is a significant reduction in energy consumption while the same air performance can be maintained: compared to Triac-controlled ventilation concepts, annual savings of up to 50 percent are possible. The entire ventilation system is more pressure-stable and less susceptible to wind. The climate computer controls just one exhaust air chimney steplessly from 0 to 100 percent and only starts up additional chimneys at full capacity (on/off method) when required.