Box Fan Filter Bracket
thingiverse
There are numerous tutorials available online that demonstrate how to create a budget-friendly and efficient indoor air cleaner, but many of these require the use of brackets attached to the fan or tape to hold the filter in place. These instructions don't necessitate either of those steps and can be reused multiple times! A pair of these brackets can securely hold a 20"x20"x1" MERV13 furnace filter onto the face of any 20" box fan that's approximately 4.4" thick, effectively creating an almost HEPA filtration unit to improve breathing for you and your family during wildfire season. For more information on the effectiveness of this filter and fan combination, as well as operating tips, visit https://www.pscleanair.gov/525/DIY-Air-Filter.
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