How does an air conditioner cool down a room?
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Gas is compressed into a liquid outside your house. Doing this creates a lot of heat. A big fan blows the heat away outside.
The liquid moves along a tube until it goes inside your house. The liquid then turns into a gas, which make it become very cold. Another big fan blows across the cold area and in into your house.
Then the gas goes through another tube back outside, where it’s turned to liquid again and the cycle continues. If you’re following along here, you can see that if you just reversed this process, you could theoretically use the same idea to also blow hot air INSIDE your house during the winter. Some systems are set up to do this, and they’re very neat!
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