Electric Hot Water Heater Recovery. A 50-gallon hot water heater with 5,500-watt elements set to 120 degrees takes
about 1 hour and 20 minutes to heat water coming in to the unit at 60 degrees. Conversely, when the water entering this same tank is 40 degrees, it takes
1 hours,
47 minutes to heat it up.Aug 23, 2010
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