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For my spouse's classroom, I made a 4-filter-cube and fan filter setup using this video as the basis. https://youtu.be/Y7eL2OAnqc8 https://youtu.be/Y7eL2OAnqc8

by Wistar 5y ago

For my spouse's classroom, I made a 4-filter-cube and fan filter setup using this video as the basis. https://youtu.be/Y7eL2OAnqc8 https://youtu.be/Y7eL2OAnqc8 I added a fan shroud on the exhaust side of the fan using a piece of cardboard with a circular cutout matching the diameter of the fan blades.