Air filtration system with filter efficiency management

A filtration system for trapping airborne contaminants, said filtration system comprising:

• a) a housing with an airflow channel therethrough having an air entry port and an air exit port;
• b) a vacuum production device for drawing air through said airflow channel;
• c) a variable speed motor operating the vacuum production device;
• d) air pressure measuring apparatus disposed at the air exit port for measuring air pressure at said port, upstream from the motor;
• e) a system processor for receiving and processing data, said system processor in communication with the variable speed motor for controlling motor speed and receiving operation duration data and in communication with the air pressure measuring apparatus for receiving air pressure difference measurement to thereby correlate cumulative motor speed, operation duration, and air pressure difference measurements into a cumulative time and filtered-air volume operating correlated value and automatically comparing said operating correlated value to a plurality of known pre-determined correlated values each reflecting remaining time duration operability of a replaceable filter structure at one respective pre-determined correlated value;
• f) a data display site in communication with the system processor for displaying data from said system processor;
• and
• g) a replaceable filter structure disposed in the airflow channel for capturing airborne contaminants, said filter structure comprising at least one filtration medium for capturing airborne contaminant, and a memory device in communication with the system processor for receiving and storing remaining time duration operability data and for sending said remaining time duration operability data from the filter structure to the system processor for display at said data display site.