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I have totally free hot water which I can arrange to be at top temperature at the machine - all it needs to do is regulate the intake. The machine starts cold so total/final temperature will be lower than the intake and it is only at the start that it would take in hot water, rinses being cold. Any heating up by electricity has two implications, one financial and the other environmental. The main question is whether any hot fill machine will appropriately use the hot water and neither disregard it.or over-use it and end up at too high a temperature.