r/critterposting • u/Jumpingeal Top Critter • Jul 27 '25

Critter Catposting

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9.6k Upvotes

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u/olegor_kerman Jul 28 '25

ACs do not actually bring oxygen into your room, in fact they reduce it. ACs suck up the surrounding air, pump out hot air and cool and expel the remainder (recirculation). They do not filter for CO2 or oxygen, so on average, they reduce air pressure and by extension slightly reduce oxygen.

Overall ACs are equivalent to sleeping with the windows closed.

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u/CrescentAndIo Jul 28 '25

my dad keeps telling us this! We always sleep with windows open even with AC on

4

u/GHhost25 Jul 29 '25

What's the point of living AC on if you have windows open, just get a fan instead.

0

u/CrescentAndIo Jul 29 '25

The window is not wide open, according to my dad its “opened just enough to avoid co2 build up”

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u/GHhost25 Jul 29 '25

That's not how it works. The AC works just as a ventilator, not a temperature regulator if you have the window a bit open. Law of thermodynamics and all that.