The Easiest, Most Affordable DIY Air Purifier!⁠ ⁠ 1. Get a 20 x 20 box fan⁠ 2. Get a 20 x 20 Filtrete Filter*⁠ 3. Start the fan⁠ 4. Suction the filter to the back of the fan⁠. Tape it on if you want filter to stay on when fan is off. ⁠ * Look for Merv 11, 12, 13, or 14 on the filter. You want a high Merv rating that will still allow air to flow through.⁠ ⁠ Have any questions? Ask away! 🤗 | Branch Basics
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