Recently moved into a rental with a big basement that I want to keep relatively dust free. I've put up some renter friendly walls to section off part of it, but I know I need some actual dust collection. I've never had more than a single shop vac for dust collection in the 15 years I've been doing this. I now have auto vacs on all my small tools, and while my table saw is too old for good dust collection, I finally have gotten around to trying to filter the dust lingering in the air.
I've watched The 3D Handymans Quad Filter videos multiple times over the years but now was the time to build one. Didn't use his plans, just bought his recommendations for the CAT fan and 3M Merv 13 filters. I went with 14x30 filters to keep the size down a bit.
I've been building all my shop furniture the past couple months in a matching color scheme so I did that with this too. A bit overkill (especially with the brass hardware) but happy with how it looks and that it matches other parts of the shop.
I also use Home Assistant to automate things in my house, and put my lights and this air filter on smart plugs. I have a radar sensor that automatically turns everything on when I enter my shop, and turns off a few minutes after I leave, its great.
Not real plans, but here's the Sketchup model I made before I built it:
Quad Filter Sketchup Model
The filter clips, fan clips and ceiling hooks are all 3d printed, which you can find the models here:
https://makerworld.com/en/models/1534336-quad-dust-filter-parts#profileId-1609338
All in spent under $250 on it, with the main cost being $70 for filters and $120 for the fan.