DIY filter systems improve air quality in classrooms (IMAGE)

American Chemical Society

DIY filter systems improve air quality in classrooms

Caption

A C-R Box is made from a standard box fan, four high-efficiency filters, two pieces of cardboard, and tape, creating a device that can improve air quality in active classrooms.

Credit

Adapted from ACS ES&T Air 2026, DOI: 10.1021/acsestair.6c00143

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