There is nothing new here, MERV-13 and 4+ air changes per hour are already being recommended in commercial buildings. https://www.atlenv.com/building-ventilati

There is nothing new here, MERV-13 and 4+ air changes per hour are already being recommended in commercial buildings. https://www.atlenv.com/building-ventilation-the-proper-air-changes-per-hour-ach https://www.atlenv.com/building-ventilation-the-proper-air-c... https://www.ashrae.org/file%20library/technical%20resources/ashrae%20journal/2020journaldocuments/72-74_ieq_schoen.pdf https://www.ashrae.org/file%20library/technical%20resources/...