Protect your mini split unit | DIY filter box

I recently installed a mini split unit in my shop, and just in time for summer. But I wanted to protect it from all the sawdust getting into the coils. And I think we can all agree the filters that come with these mini splits are useless. So I did some research and made a filter box. My Website: https://website.beacons.ai/birgecustomwoodwork ROVSUN mini split: https://www.amazon.com/dp/B09T6Y6ZLW?coliid=I3A06ULQJ1S4QW&colid=XWTPJXDBPFXR&th=1&linkCode=ll1&tag=birgecustomwo-20&linkId=9459c01b9ec25d08ef7c20499a5b0f97&language=en_US&ref_=as_li_ss_tl Kreg K4 pocket hole jig: https://www.amazon.com/dp/B001DYFISG?coliid=I2DQ69SC8YW7PJ&colid=XWTPJXDBPFXR&th=1&linkCode=ll1&tag=birgecustomwo-20&linkId=b4337b37e7e5f0b8c43a0b266b28d997&language=en_US&ref_=as_li_ss_tl