In my country solar panels exclusively for water heating (without electricity, or resorting to a backup electric heater just for extreme weather circumstances) are not unheard of, yet they're not so cheap. Had i been living in a house instead of an apartment, maybe I could consider such setup.
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Originally Posted by JSH
I've seen those units in various places around the world. The B&B we stayed at in Scotland had an on-demand electric water heater right in the shower.
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You mean anything (at least conceptually) similar to this?
https://www.leroymerlin.com.br/chuve...zetti_86213043