Microprocessor controlled, high-speed adaptive control system for variable control of room supply air and room exhaust air volume flows, particularly suitable for clean rooms and laboratories. A high-speed control algorithm compares the setpoint with the actual value measured by a differential pressure transmitter and regulates the flow quickly, precisely and steadily, independent of pressure fluctuations in the duct system. The minimum and maximum volume flow setpoint is freely programmable and is saved mains voltage failure-safe in the EEPROM.

Microprocessor controlled, high-speed adaptive control system for variable control of room supply air and room exhaust air volume flows, particularly suitable for clean rooms and laboratories. A high-speed control algorithm compares the setpoint with the actual value measured by a differential pressure transmitter and regulates the flow quickly, precisely and steadily, independent of pressure fluctuations in the duct system. The minimum and maximum volume flow setpoint is freely programmable and is saved mains voltage failure-safe in the EEPROM.