Low-cost air-ventilation systems have been installed in many classrooms across the U.S. to help reduce COVID-19 transmission.
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Air-ventilation upgrades have been badly needed in U.S. classrooms since long before the pandemic. Low-tech filtration systems that cost about the same as a textbook per student can make a big difference.
Busy highways are large sources of air pollution.
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Living next to a highway is not great for health, but a new study shows that running air filters indoors can remove tiny particles of pollution and lower blood pressure.
Open windows and doors to boost air flow and help remove airborne particles.
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Being indoors with other people is a recipe for spreading the coronavirus. But removing airborne particles through proper ventilation and air filtration can reduce some of that risk.
Open windows are the easiest way to ventilate a room.
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Good ventilation can reduce the risk of catching coronavirus. An environmental engineer explains how to know if enough outside air is getting into a room and what to do if ventilation is bad.