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Old 08-02-2022, 10:31 PM   #61
LikeLakes
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I don't understand why running the hot water heater for a few hours a day on a timer or switch saves much, if any, energy.

Leave it on, and it maintains the temp you have it set for. Temp drops a bit and it comes on, in a 2 element unit (many are) only one element comes on.

Turn it off for 12 hours and turn it back on, you are asking it to heat water from whatever it has dropped to back up to temp, using a longer run of the element and likely kicking in the 2nd element.

And finally, if you use some of the hot water when the heater is turned off, you are later heating from room temp to set temp since you pulled much of the residual heat out by using the water.

I'm not following the logic. I still say, make sure it is well insulated, and leave it on. JMO.
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