Air Heaters are easy to understand, it’s basically just running electricity through a wire, so that excess energy turns into heat. Heating is easy enough that you can do it in the form of a campfire with primitive tools.
Air Cooling is a lot harder. I can’t think of a single way to just up and cool air without the use of something that’s already cold.
So how does Air Conditioning work?
(If it’s just some specific obscure chemical reaction then I’ll be disappointed)
In: Technology
A compressor takes electrical or mechanical power and uses that to compress a refrigerant gas. That gas is then released into a series of coils where it can expand in volume. That expansion causes the gas to become very cold, which makes the coils very cold. Air is blown over the cold coils, which cools the air. The cool air is then blown through ducts to cool the building/car/whatever.
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