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Hi there, Electrical, I'm am not an engineer, though I do have some lay level exposure to industry (cut my teeth in the linen supply business 30 years ago) You're of course right in that insulation for heat that can recycle into a primary process is the cheapest way to save energy/improve energy efficiency. In linen supply we used to pre-heat water with waste from the washers and there wasn't a pipe or tank that didn't sport an inch of insulation - in those days asbestos. I don't think this machine would have helped us much. However, at my church I've gotten to know an engineer in waste water treatment and another non-engineer who works in a lumber mill. Both these guys have to cool liquids - in the sewage plant it's before ejecting water into the environment, though I don't know the specifics, and at the saw mill they seem to have a lot of hot oil left from cooling processes of some kind (likely saws?) and they need to drop the temp before re-using. Don't you think this type of machine can help meet their cooling requirements while making some electricity in the process? Seems the payback would be as much a function of the cost of electricity in their areas. The sewage guy has researched this machine quite a bit and thinks it shows some promise, then his cooling requirements are now govt mandated, so he's motivated. BTW Which industry are you in?