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Old 12-19-10, 03:26 PM   #8
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Originally Posted by PastTense View Post
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?
I guess that depends on the amount of hot water you use, eh? But it seems plausible to me.

To avoid having to look up the UA of your HWH, try a simple test:

Record the temperature of your hot water. Shut off the heater, wait 24 hours, and take the temperature again. How much heat did you lose? This is equivalent to wasting a certain amount of hot water a day - how much?
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