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Old 12-19-10, 11:37 AM   #6
Lurking Renovator
Join Date: Dec 2010
Location: Iowa
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From the article:
"Where I live electricity costs about $0.07 per kWh so a typical electric water heater with no additional insulation might cost about $150 per year to operate. Depending on use, perhaps $50 of this is actually used to raise the temperature of the incoming cold water. The remaining $100 is wasted in the form of heat dissipation to the surroundings. "

Do you agree with these kinds of numbers as to how much of the energy is dissapated as waste heat? I was under the impression that the the substantial majority of the heat is used to heat the water. Anyone have better numbers?

Also note part of the waste heat will still be wasted--top and bottom of water heater.
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