I recently stayed in an apartment that didnt have central air so I created a corsi-rosenthal box since the smoke from the Canadian wildfires were so bad.
After 30 days of continuous use, with very minimal periods of it being turned off, this is what the filters look like!
It's disgusting yet also so satisfying to see the filters get darker from debris, dust, and dirt.
Edit: typos
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.
In that pic it's blowing up, sucking intake through the filters and blowing filtered air into the room.
I would imagine it blows upwards, so it sucks in air through the filters and blows clean air up.
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.