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The Homemade Air Purifier That's Been Saving Lives During the Covid-19 Pandemic | Innovation| Smithsonian Magazine
Duct-Taped $70 DIY Air Purifier Outperforms $1,000 IQ Air – Smart Air
DIY box fan filters – Corsi-Rosenthal box - Clean Air Crew
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How to make a DIY air filter with a box fan to protect against covid - The Washington Post
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Better Box Fan Air Purifier
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How to Make a DIY Air Purifier to Filter Smoke & Allergens | Creative Green Living
