Patent ID: 8485874

Claim:
An air-pressure control system, the system comprising: a system inlet; a system outlet; a first filter located within an airflow path between the system inlet and 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; a differential-air-pressure transducer configured to monitor an air pressure differential between the system inlet and the system outlet; a closed-loop controller in communication with the motor controller and the differential-pressure transducer, wherein the pressure 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 a germicidal radiation chamber located within the airflow path in the air-pressure-control system, wherein the germicidal radiation chamber includes at least one UV light source, and wherein the airflow path is blackened to prevent UV reflection through the system inlet and system outlet.