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Use this tool to learn how your school can optimize ventilation to reduce virus particles in classrooms. Get Started. Opening windows, using portable air cleaners, and improving building-wide filtration are ways you can increase ventilation in your school or childcare program.
May 12, 2023 · Use portable or built-in high-efficiency particulate air (HEPA) fan/filtration systems (also called air cleaners or air purifiers).
- 1. Can COVID-19 be transmitted through HVAC (ventilation) systems?Some SARS-CoV-2 viral particles might travel from one space to another through an HVAC system. However, this is not known to be a significant risk...
- 2. How long will it take to dilute the concentration of infectious particles in a room once they are...The time required for dilution will depend on room ventilation airflow and its effectiveness. While large droplets (100 micrometers [µm] and larger...
- 3. Can ventilation filters effectively capture SARS-CoV-2 viral particles?Yes, filters with higher collection efficiencies can provide significant reductions in viral particle concentrations. Filters for use in heating, v...
- 4. What is meant by “directional airflow?” How and where should it be used?Directional airflow is a protective ventilation concept where air movement flows in a clean-to-less-clean direction. This ventilation concept is ap...
- 5. What is a HEPA filter and why use an in-room HEPA air cleaner?By definition, a High Efficiency Particulate Air (HEPA) filter is at least 99.97% efficient at capturing particles 0.3 µm in size. This 0.3 µm part...
- 6. Does ultraviolet germicidal irradiation (UVGI) kill SARS-CoV-2?Yes, when an appropriate dose of UVGI is applied. Ultraviolet germicidal irradiation (UVGI), otherwise known as germicidal ultraviolet (GUV), is an...
- 7. What types of ultraviolet germicidal irradiation (UVGI) devices are available for air and surface...UVGI devices can take many shapes and sizes. They can also be mounted in various places. Depending on the manufacturers’ claims, these devices may...
- 8. Many new air disinfection devices are marketed for their ability to inactivate SARS-CoV-2. How ca...CDC recommends using technologies that are known to work and will not cause harm. Be cautious when considering an emerging new technology. Do your...
- 9. Can carbon dioxide (CO2) monitors be used to indicate when there is good ventilation?Yes, carbon dioxide (CO2) monitoring can provide information on ventilation in a given space, which can be used to enhance protection against COVID...
- 10. Should indoor temperature and humidity be used to help reduce the risk of COVID-19 transmission?Generally, no. Temperature and humidity can both influence the transmission of infectious diseases, including COVID-19, but that influence has prac...
Feb 17, 2021 · In separate tips on ventilation, the agency describes this as a cost-free way to reduce the spread of the virus, along with inspecting and maintaining local exhaust ventilation; repositioning...
- Sarah D. Sparks
- Assistant Editor
- ssparks@educationweek.org
Aug 26, 2021 · The idea is simple: The fan sucks air through the filters, effectively cleaning it of particles the virus might be floating along on. Experts say filters with a so-called MERV 13 rating or better...
- Gabrielle Emanuel
Aug 27, 2021 · Scientists and engineers say one of the easiest ways to help kids not catch COVID-19 in schools is to circulate the air regularly. So what do you do if your school is lagging behind?
May 3, 2021 · Academic experts are encouraging schools to pump in more fresh air and use tried-and-true filters, like HEPA, to capture the virus. Yet every ion- or hydroxyl-blasting air purifier sale ...
