DIY Air Purifiers for Teachers: Free Designs & Step-by-Step Instructions Online


If you’re a teacher returning to the classroom, you may want some extra COVID protection. Thankfully, some researchers and practitioners have created “a design for an in-room air purifier which can remove a significant amount of COVID-19 virus from the air.”

“The design involves making a ‘box’ out of four 20″ MERV-13 filters (the ‘sides’ of the box), a 20″ box fan (the ‘top’ of the box), and a cardboard (the ‘bottom’ of the box’). Air flows in through the filter sides, removing particulates of the sizes that can transport COVID-19 particles, and then flows out through the fan at the top.” These devices can be built from parts available at Home Depot, Walmart and other big box stores, and assembled in about 30-60 minutes. Total cost runs $70-$200. Find designs and a step-by-step instructions here. And read more about the purifier at NPR.

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