I have seen this several times in 1950s/1960s eastern bloc apartments. I was onl... | Hacker News

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		Symbiote on July 7, 2022 \| parent \| context \| favorite \| on: Large-scale ‘sand battery’ goes online in Finland I have seen this several times in 1950s/1960s eastern bloc apartments. I was only visiting, so I don't know if it was the original design, or if the valves have jammed.

konschubert on July 7, 2022 [–]

This was standard in the Sowjet Union. If you think it’s too warm, you open the window.

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