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by sokoloff 3732 days ago
The electricity used by those will be dwarfed by the energy used to heat the incoming water. A large electric tankless heater (served by a 240VAC/100A and drawing 18kW) can supply a 2gpm showerhead.

Compare that to a computer and PJ, several of which can be comfortably serviced by a single 120VAC/15A circuit.