Acquisition of BASX Solutions

Indoor Air Quality (Continued) • Filtration - ASHRAE now recommends using a minimum filter level of MERV 13 to mitigate infections aerosols. - Prior to 2020, a vast majority of commercial buildings utilized filtration levels of MERV 4 to MERV 8. - Standard packaged rooftop units in the market, particularly 40 tons and smaller, are not typically built to support this recommended level of filtration because it imposes an increased pressure drop. - However, AAON standardizes a design that uses a backward curved plenum fan wheel, which can accommodate higher airflow and static pressure with very little reconfiguration. - Thus, more often than not, in the 40 ton and smaller category, it is easier for existing buildings that use AAON equipment to retrofit its filtration to a higher MERV level compared to buildings that do not use AAON equipment. Air Disinfection - ASHRAE supports using ultraviolet lighting and bipolar ionization technology. - AAON units, including systems already installed, have capabilities of utilizing this technology. - Ultraviolet Lighting for Air Disinfection - ASHRAE states, "Ultraviolet energy inactivates viral, bacterial, and fungal organisms so they are unable to replicate and potentially cause disease." - Bipolar lonization uses an electronic charge to create a plasma field filled with a high concentration of positive and negative ions. As these ions travel with the air stream, they attach to particles, pathogens and gas molecules. The ions help to agglomerate fine submicron particles together, which allows the HVAC filters to trap them more effectively. AAON 27

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