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DIY air filtration. Just tape 5 20"x20" furnace filters to a box fan. Worked better than I exp… | Garage workshop organization, Workshop organization, Garage shop
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DIY Homemade Air Cleaner HEPA Filter Remove PM2.5 Smoke Odor Dust Formaldehyde for xiaomi Air Purifier pro/2s/2/1/3h Home /Car
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