Abstract: Disclosed is an air filtration system for filtering air of an enclosed volume comprising a channel for receiving external air; a recirculation channel for receiving recirculated air from the enclosed volume; an air filter device for filtering an air flow into the enclosed volume, the air flow comprising at least one of the external air and the recirculated air; and an electronic control unit for determining a loading status of at least one air filter of the air filter device, based on: a level of particulate pollution in the external air, a level of particulate pollution in the recirculated air, a flow of the external air in the channel, a flow of the recirculated air in the recirculation channel, and an efficiency of the at least one filter of the air filter device. Further disclosed is a control device for the system, and a method for operating the system.

Abstract: A computer implemented system and process of analyzing real-time measurements of a one or more air quality sensors to provide an calculated estimate of airborne virus infection and air quality evaluation from current air quality measurements, advise those at risk, advise responsible parties of recommended actions to take, and in some embodiments take direct action in communication of instructions to air filtration and treatment equipment and HVAC systems to improve outside air flow, increase filtration, treat contaminated air and reduce humidity and reduce the risk of airborne virus transmission. Sensor data, calculated airborne infection risk, air quality, warnings and reports are created and distributed to network connected devices.

Abstract: A computer implemented system and process of analyzing real-time measurements of a one or more air quality sensors to provide an calculated estimate of airborne virus infection and air quality evaluation from current air quality measurements, advise those at risk, advise responsible parties of recommended actions to take, and in some embodiments take direct action in communication of instructions to air filtration and treatment equipment and HVAC systems to improve outside air flow, increase filtration, treat contaminated air and reduce humidity and reduce the risk of airborne virus transmission. Sensor data, calculated airborne infection risk, air quality, warnings and reports are created and distributed to network connected devices.

Abstract: A computer implemented system and process of analyzing real-time measurements of a plurality of air quality sensors to provide an calculated estimate of airborne virus infection and air quality evaluation from current air quality measurements, advise those at risk, advise responsible parties of recommended actions to take, and in some embodiments take direct action in communication of instructions to air filtration and treatment equipment and HVAC systems to improve outside air flow, increase filtration, treat contaminated air and reduce humidity and reduce the risk of airborne virus transmission. Sensor data, calculated airborne infection risk, air quality, warnings and reports are created and distributed to network connected devices.

Abstract: A computer implemented system and process of analyzing real-time measurements of a plurality of air quality sensors to provide an calculated estimate of airborne virus infection and air quality evaluation from current air quality measurements, advise those at risk, advise responsible parties of recommended actions to take, and in some embodiments take direct action in communication of instructions to air filtration and treatment equipment and HVAC systems to improve outside air flow, increase filtration, treat contaminated air and reduce humidity and reduce the risk of airborne virus transmission. Sensor data, calculated airborne infection risk, air quality, warnings and reports are created and distributed to network connected devices.