Hi there. My shop is dusty. It probably has something to do with using a Shop-Vac as dust collection but I’m addressing that by buying a dust collector. Even so, I don’t expect it to collect everything so I’m waging a war on dust on two fronts. I made a cheap (under $100 for the housing, fan, and f…

Really nice build!! Thanks for sharing :slight_smile: You really wanna check out a Corsi Rosenthal Box: Corsi–Rosenthal Box - Wikipedia Make a cube out of QTY5 1” MERV 11 filters and a box fan for the top. Works even better than dedicated air purifiers because air flow goes up by the square of fi…

Well thanks, I guess, for sending me down yet another rabbit hole. lol

I confess I have a “bought” one - a JET version from around the turn of the millennium, when it was cheaper for me to buy than to make. Not to hijack this thread, but to inform, if you can deal with the loss of heat or cooling in your shed, while the filter is great you can improve air quality even…

I’m cheap. I just duct tape a 20x20 filter to the back of a box fan.

8" duct fans for under US$100 work great. Made a big difference in my setup compared to my previous fan in a window setup. Plus I can now control the exhaust fan with FluidNC. [image] Bote Electric Appliance (Vevor, etc.) EC Inline Duct Fan PWM Control with FluidNC Random …

That’s what I use in the house. Big ole 4” filter and a $20 fan and some duct tape. We did spring for the fancy white duct tape to match the fan though. We fancy. I’ve read all about C-R boxes before, mostly from the covid times, and originally thought about doing that for this design. To be honest…

My garage is insulated, heated, and cooled so I did consider, but only briefly, just getting a monster vent fan and blowing dust into the woods.

I am using my old stove hood thingy (don’t know the English name).

[image] Philipp: (don’t know the English name). In English it’s “Stove hood thingy”.

Cheap air filter box

LowRider CNC Hardware Development

Jonathjon (Jonathan Jones) November 25, 2025, 11:02pm 2

Very nice build! I built something similar a few years ago using an old squirrel cage fan that has been working great! Its time to change the filters on it now lol