1905
Ancient Iran had air conditioning (lemmy.world)
submitted 3 years ago by to c/mildlyinteresting@lemmy.world
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[–] 24 points 3 years ago (5 children)

What’s your source for this? It routinely gets over 100 here and buildings aren’t 80 degrees inside.

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  • [–] 14 points 3 years ago* (2 children)

    We're talking celsius, I hope for your sake it doesn't routinely get to 100 C where you are. :)

    Edit: The user actually said 20 F, I got confused by the mix of units. "50c to 35c is 27 degrees" didn't make sense to me, but I figured I'd let it slide. No idea what's going on here. :)

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  • [+] 3 points 3 years ago (1 child)
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  • [–] 2 points 3 years ago*

    Yes, that sounds about right - the relative effect of the tower probably depends a lot on various factors like how windy it is, if extreme heat occurs only for a day or if it has been ongoing so that the water under ground is heated as well, etc.

    These comments were in response to @Gangreless, who stated that a modern AC "can only cool about 20f below the outside temperature". I didn't catch that it was fahrenheit first, and now that I know I am happily backing off rather than having to think in terms of freedom units.

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  • [–] 14 points 3 years ago

    They're full of it, that's it. Maybe in their house which lacks sufficient insulation. Heat pumps (i.e. air conditioning) are/is extremely efficient at moving heat around, there's not really a practical limit on it, particularly if you go geothermal.

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  • [–] 3 points 3 years ago* (last edited 3 years ago)

    20 degrees is just a rule of thumb most ACs have a specific temperature change they're designed to do. You can go past it, that's just what the intented to do and it might not work as well or be able to do it. Fwiw I'd always heard 30 degrees farenheight for most window units. Had an hvac guy explain it to me years ago but fucked if I remember how it works

    E: not sure why I'm getting downvotes this is like a very common thing. Google it https://frederickair.com/home-comfort/reduce-the-stress-on-your-ac-with-the-20-degree-rule/

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