SARS-CoV-2, the virus that causes COVID-19, is thought to spread mainly from person-to-person through respiratory droplets.
On the recommendation of the ASHRAE Epidemic Task Force, ASHRAE Leadership states that transmission of SARS-CoV-2 through the air is sufficiently likely that airborne exposure to the virus should be controlled. Unconditioned spaces can cause thermal stress to people that may be directly life threatening and that may also lower resistance to infection. In general, disabling of heating, ventilating, and air conditioning systems is not a recommended measure to reduce the transmission of the virus.
Ventilation and filtration provided by heating, ventilating, and air conditioning systems can reduce the airborne concentration of SARS-CoV-2 and thus the risk of transmission through the air. Most would agree that upgrades to filter efficiency, whether it’s a mask or an AHU system, would be an effective way to assist in filtering out unwanted airborne particles. However, careful consideration needs to be made when selecting the types of filters used for existing AHU systems.
The entire ultraviolet (UV) spectrum can kill or inactivate microorganisms, but UV-C energy (in the wavelengths from 200 to 280 nm) provides the most germicidal effect, with 265 nm being the optimum wavelength. The majority of modern UVGI lamps create UV-C energy at a nearoptimum 254 nm wavelength. UVGI inactivates microorganisms by damaging the structure of nucleic acids and proteins with the effectiveness dependent upon the UV dose and the susceptibility of the microorganism
Climate Systems is a Sioux Falls HVAC company that specializes in Sioux Falls commercial HVAC design, installation and management.