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About a year after installing my Mr Cool mini split AC unit in my shop I decided to build a filter box above the unit to pre-filter all the fine dust you will find in a wood working shop. The area around the mini split is limited so I used two 16x25x1 (MERV8) furnace filters which will provide about 4 times the area of the unit's current air intake. The filters will be rotated regularly to keep the air as unobstructed as possible. This pre-filter should keep the inside of my Mr Cool good as new!
Overall a pretty easy project with just basic tools and no fancy joinery. I used ½ inch cabinet grade ply wood left over from a previous project and a scrap piece of ¾ plywood for the french cleat.
I plan to post and update here after a few months of usage to let everyone know how well it works.
Let me know if you have any comments, questions or suggestions and feel free to share this video with your family and friends. Subscribe to be notified when we post new videos.
Original video music by Dr Joel Hoffman, MD
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My videos are for entertainment purposes only. Be sure to read your tool manufacture’s guide and understand the manufactures safety instructions. The methods I have used may not be the safest possible. You are responsible for your own safety when using hand or power tools.
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