My sil turns her water heater down every night and claims she saves a lot on her light bill by doing this.
To my understanding, this would not be a safe thing to do, depending on the temperature she turns the hot water heater down to. I realize that overnight is not a long time to leave the water standing, however, it is still not recommended that the hot water heater be turned to less that 120 degrees unless you are going away for a few days. Perhaps I am overly cautious?
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