this post was submitted on 22 Nov 2023
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Heat-pump water heaters are a winner for the climate — and your wallet (www.canarymedia.com)
submitted 11 months ago by [email protected] to c/[email protected]
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[–] [email protected] 1 points 11 months ago

It has nothing to do with energy efficiency, and everything to do with UK plumbing. A building's hot water system is presumed to be subject to environmental contamination, and not considered potable. Only the cold water supply is considered potable.

It's the same reason why they have separate taps for hot and cold water, while the US uses mixing taps almost everywhere.