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Heat pumps twice as efficient as fossil fuel systems in cold weather, study finds
(www.theguardian.com)
Rumors, happenings, and innovations in the technology sphere. If it's technological news or discussion of technology, it probably belongs here.
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Technology Connections on YT did a side-channel experiment on this very thing.
https://youtu.be/eUywI8YGy0Y
Normally I wholeheartedly recommend his stuff, but the side-channel content gets very long winded and rambling, linked video included.