Fantech Covid-19 Airborne Risk Calculator Help

Disclaimer

This calculator is for the propagation of COVID-19 by airborne transmission only.

The model is based on a standard airborne disease transmission model calibrated to COVID-19 using published quanta emission research.

This tool does not include close-contact or fomite transmission and assumes the space is well mixed.

Fundamental Concept

This tool models a single event where one infectious person shares a room with susceptible occupants for a defined period.

It uses quanta emission, clean-air removal, viral inactivation, particle deposition, and inhalation rate to estimate individual risk and probable cases.

Calculator Fields

Floor Area and Room Height: Used to calculate room volume.

Clean Airflow: Any virus-free airflow entering or effectively cleaning the space, including outdoor air, filtered recirculation, or air purifiers.

Exposure Time: How long infected and susceptible people share the same environment.

Humidity: Affects viral inactivation.

Number of Susceptible People: The number of people who could be infected, excluding the infectious person.

Pathogen / Activity / Mask Strategy: These inputs change emission and inhalation behavior, which directly affects risk.

Results

Individual Risk: Likelihood that one susceptible person is infected.

Max Occupancy: Maximum susceptible occupancy before an infection becomes likely.

Probable Number of Cases: Expected number of infections during the event.