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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[–] BedSharkPal@lemmy.ca 50 points 1 day ago (6 children)

Now imagine that, but in your lungs. Yikes.

[–] einfach_orangensaft@sh.itjust.works 44 points 1 day ago (5 children)

lungs are self cleaning, dirt just dosent stay in there it gets pushed out again by tiny moving hairs

[–] lauha@lemmy.world 0 points 1 day ago

Some dirt gets pushed out and sum just stays

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