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(lemmy.ca)
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this post was submitted on 30 Apr 2026
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Heat pump could heat your house if it's near 0K "outside". Heat pumps are how we chill to near 0K anyways. And by heat pump I mean literally a window air conditioner. Replace the freon in your typical AC with helium and get a really fancy evaporator (cold head or cold finger is the trade term) and you could probably get a 10cc vial on the end to sub 70K. With vacuum and a bigger 240V window AC unit you can get near 4K. Running multiple heat pumps in stages and with liquid nitrogen as coolant for some of them and you can condense helium and push really close to 0K.