AlfaTech HVAC System Strategies for Airborne Diseases

H V A C S Y S T E M S T R A T E G I E S F o r A i r b o r n e D i s e a s e s

The Wells-Riley Equation A MATHEMATICAL MODEL OF AIRBORNE INFECTION

Nc: Number of new infections

S: Number of susceptibles

I: Number of infectors

Increased ventilation (Q) will reduce the number of new infections in the building

q: Number of infectious doses

p: Pulmonary ventilation rate per susceptible

t: Exposure time

Q: Flow rate of uncontaminated air