this post was submitted on 08 Jul 2025
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Mildly Interesting

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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

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[–] Korhaka@sopuli.xyz 21 points 3 days ago (1 children)

Been aware of the general idea for a long time, but had no idea that strapping HEPA filters to a fan has a fancy name.

[–] Diurnambule@jlai.lu 8 points 3 days ago* (last edited 3 days ago) (2 children)

You have to cut some cardboard and use tape too. After when your solution beat every commercial solution you are allowed to name it, just to be able to shame corpo easily.

[–] atlas@sh.itjust.works 1 points 1 day ago* (last edited 1 day ago) (1 children)

from huppakke:

Someone posted a link to Wikipedia in the comments, came across their names:

Richard Corsi, an environmental engineer and the incoming Dean of Engineering at the University of California, Davis

Jim Rosenthal, the CEO of filter manufacturer Tex-Air Filters

take what you will from this, but it's definitely not a stick-it-to-the-corp kinda thing

[–] Diurnambule@jlai.lu 2 points 1 day ago

Yeah I was trying a joke. It still beat commercial alternatives which I fell is a Second good reason to give it a name.

[–] Korhaka@sopuli.xyz 2 points 3 days ago (1 children)

Could use those circular filters stacked on each other and a fan at the top. Name it my column.

Didgeridoo air filter is also tempting me now.

[–] Diurnambule@jlai.lu 1 points 3 days ago

Dongderidong air filter ?