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

TEMPERATURE AND HUMIDITY

• Higher space humidity levels slow the evaporation of large droplets.

• Controlled humidity reduces transmission of certain airborne infectious organisms including influenza.

• Breathing dry air can cause desiccation of nasal mucosa, which can make occupants more susceptible to respiratory virus infections.

• Maintain dry-bulb temperatures per ANSI/ASHRAE Standard 55- 2017.

2018 study: Humidity decreased Influenza A illness in pre-school

• Maintain RH level between 40% and 60%. This could require humidification during dry & cold and dry & hot days.