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I have read several of Dan's books as well as other literature and I was hoping to clarify something; the definition of <strong><span style="text-decoration:underline;">BTU</span>. </strong>Most of the definitions reference a BTU being the amount of heat necessary to raise 1 pound of water by 1 degree Fahrenheit. I understand this but others reference a time, that being one minute; "the amount of heat necessary to raise 1 pound of water by 1 degree in 1 minute". Which is the correct answer? Thanks in advance for your help.