this post was submitted on 08 Jul 2025
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Mildly Interesting
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Can you talk about how you made this
It’s literally what you see in the picture. Just household furnace filters taped into a box with a fan. You can pick your level of filtration with the type of filters you buy.
Does the fan suck or blow, and why? I seem to recall that the motor will burn out if you face it the wrong way.
Looks like it's sucking air through the filters.
I would imagine it blows upwards, so it sucks in air through the filters and blows clean air up.
In that pic it's blowing up, sucking intake through the filters and blowing filtered air into the room.
It is setup to pull in air through the filters into the box and push it up through the top.
UC Davis has a video on how to build one.