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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