100% Outside Air VRF Systems: A Sustainable, Hybrid Approach for Superior IEQ
Increasing the amount of outside air to the occupied space and increasing ventilation air change rates are effective solutions for reducing concentrations of contaminants and the risk of infection.
On April 5, 2021, ASHRAE’s Epidemic Task Force released an updated letter on airborne transmission guidance for SARS-CoV-2. The letter stated, “Airborne transmission of SARS-CoV-2 is significant and should be controlled. Changes to building operations, including the operation of HVAC systems, can reduce airborne exposures.”
On May 7, 2021, the U.S. Centers for Disease Control and Prevention (CDC) posted the following update on SARS-CoV-2 transmission: “SARS-CoV-2 is transmitted by exposure to infectious respiratory fluids.” The same posting goes on to state, “Infectious exposures to respiratory fluids carrying SARS-CoV-2 occur in three principle ways… deposition, touching, and inhalation of air carrying very small droplets and aerosol particles that contain infectious virus.”