Quote:
Originally Posted by fshagan
It takes a certain amount of energy to raise the water a degree ... 2.42 watts per gallon. If you have to raise it 10 degrees, it doesn't matter if the heater comes on ten times to raise it one degree, or if it comes on once to raise it ten degrees. You use the same energy to recover the 10 degrees of heat you lost.
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Here's another aspect to consider; with a timer installed and set to fire up the WH during lower electric rates, there's an advantage for ya. Instead of 6,7,or 8 of those one degree cycles at daytime rates, you're getting all 10 during the reduced rate.