A metadata driven computer implemented process of interacting continuously or periodically with a plurality of remotely located air quality sensors over a network to receive real-time air quality measurements, receiving and analyzing the real-time air quality measurements of a plurality of air quality sensors and calculating an airborne viral infection risk score and air quality indicators of one or more buildings having one or more monitored air spaces, the computer implemented process comprising:
- a local or wide area network communications interface device, configured to communicate over a network with the plurality of remote air quality sensors measuring air quality parameters within the monitored air spaces of the one or more buildings;
- a database for storing current and history data;
- a network web portal configured to provide remote network access and presentation of measurements, analysis results and reports over the network to remote network connected devices;
- processing circuitry, and a non-transitory computer-readable medium, the non-transitory computer-readable medium containing one or more sets of computer instructions configured to instruct the processing circuitry to perform a plurality process steps including:
- communicating with the plurality of air quality sensors and retrieving over the network current indoor air quality measurements of the monitored air space in the one or more buildings, the air parameter measurements including:
- air CO2 concentration;
- air fine particulate matter PM2.5 concentration;
- air inhalable particulate matter PM10 concentration;
- air relative humidity;
- and
- air temperature;
- adding a time-date stamp and storing the current sensor air parameter measurements and storing to the database;
- smoothing the sensor air parameter measurements by averaging the current sensor air parameter measurements with the previous air parameter measurements of the same sensor over a configured period of time, the smoothing to reduce measurement noise;
- storing the smoothed sensor air parameter measurements to the database for access by the web portal;
- calculating a CO2 instantaneous airborne infection risk score from the smoothed CO2 sensor air parameter measurement of the monitored air space;
- calculating a PM2.5 instantaneous airborne infection risk score from the smoothed PM2.5 sensor air parameter measurement of the monitored air space;
- calculating a PM10 instantaneous airborne infection risk score from the smoothed PM10 sensor air parameter measurement of the monitored air space;
- calculating relative humidity instantaneous airborne infection risk score from the smoothed relative humidity sensor air parameter measurement of the monitored air space;
- storing the instantaneous airborne infection risk scores to the database for access by the web portal;
- determining which one of measurement types CO2, PM2.5, PM10 and relative humidity have a highest instantaneous airborne virus infection risk score;
- calculating a decay rate for viral infectivity as a function of the smoothed air temperature and smoothed relative humidity of the monitored air space,
- wherein the decay rate for viral infectivity is 1/(a calculated virus half-life);
- applying the decay rate for viral infectivity as a scale factor to the highest instantaneous airborne infection risk score to obtain an overall decay rate adjusted highest instantaneous airborne virus infection risk score;
- storing the overall decay rate adjusted highest instantaneous airborne virus infection risk score and the highest measurement type to the database for access by the web portal;
- repeating the plurality process steps for a next or same monitored air space.