No, it preheats the cold water connected to your shower. Warmer cold water means... | Hacker News

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		pg314 on Jan 16, 2024 \| parent \| context \| favorite \| on: Harnessing heat from wastewater No, it preheats the cold water connected to your shower. Warmer cold water means you need less hot water to achieve the same temperature in the shower.

megak1d on Jan 16, 2024 [–]

Ah yes, that’s much neater and more localised. Thanks

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