Hi Sridhar > Some small portion of it doesn't get necessarily turned into heat in the
> room where the equipment is located. The physics you're quoting applies > strictly to closed systems. True. "Closed" is a matter of definition, but usually there is a door there somewhere that effectively draws the boundary. Mostly I was fussing over the "no such thing as a free lunch" law of thermodynamics ... engineering nerd in me ;^) But of course, we are dickering over the stray photons that may go out the window, or sound wave bugging the neighbours. (Latter is a potential issue at my house, but not in a typical office ;^) But expect this to be almost un-measurable in normal office environment. (Could be more measurable in the server room.) Anyway, sure close enough for estimating how big the A/C bill will be! More accurate than a "worst case". Peace back, Peter
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