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Re:Large-scale ‘sand battery’ goes online in Finland by leoedin on Thursday July 07, 2022 @01:55AM (#32010400)
Assuming your pipes are between the tap and the water heater, and the pipes run indoors, the water temperature will be close to room temperature - nowhere near freezing.
Re:Large-scale ‘sand battery’ goes online in Finland by dubswithus on Thursday July 07, 2022 @08:40AM (#32013280)
Which was a problem in NL because the bathroom of the airbnb was not well insulated. And there wasn't a hot water option because... NL.