Control/regulation Speed control Speed control EC speed control Control unit for EC fan Temperature-dependent speed control for EC fan-and-filter units to reduce noise and save energy. Show products Speed control EC speed control Sensor for speed control NTC sensor for temperature-dependent speed control of EC fans to reduce noise and save energy. Show products Speed control Speed control For fan-and-filter units and air-air heat exchangers Temperature-dependent speed control to minimise noise and save energy in part-load operation. Show products