#$%^&*AU2012203618A120120712.pdf#####ABSTRACT: An air-pressure-control system, the system comprising: a system inlet 5 a system outlet a variable-speed fan configured to operate at a speed a motor controller in communication with the fan and configured to control the speed of the fan 10 a differential-air-pressure transducer configured to monitor an air pressure differential between the system inlet and the system outlet and a closed-loop controller in communication with the motor controller and the differential-air-pressure 15 transducer, wherein the closed-loop controller is configured to vary the speed of the fan based on the pressure differential between the inlet and outlet of the system, thereby controlling a pressure within a space and an interface in communication with the closed-loop 20 controller and configured to receive a setpoint value, the closed-loop controller bringing the fan to full speed upon a change in condition within the space, the closedloop controller then reducing the speed of the fan to obtain the setpoint value. 25 3451371_1 (GHMatters) P79549.AU.1 20/06/121/12 180 120 150 130 140 160 110 Clean Ar FIG.1
