How about invent a hot water system that can be used on Shabbos. We have urns for coffee. Why not make the actual boiler work in a similar way so that you can turn on the hot water in the sink/shower to wash dishes etc.
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How about invent a hot water system that can be used on Shabbos. We have urns for coffee. Why not make the actual boiler work in a similar way so that you can turn on the hot water in the sink/shower to wash dishes etc.