Heating, ventilation and air-conditioning (HVAC) systems are used to maintain indoor air temperature and humidity at healthy and comfortable levels.
A well-maintained and operated system can reduce the spread of COVID-19 in indoor spaces by increasing the rate of air change, reducing recirculation of air and increasing the use of outdoor air.
Recirculation modes (which recirculate the air) should not be used.
HVAC systems should be regularly inspected, maintained, and cleaned.
#WHO #HVAC #COVID #defrostUSA