Jeff, those EER numbers are off a bit. 1:1 COP=3.41 EER, since 1 Kw=3412 btu. A COP of 4-5 would be to 13.6-17 EER. An EER of 30 would be a COP of 8.8. Doable, but very lofty. Were they getting SEERs of 25-30 instead?
Sam, if you are unfamiliar with any of the terms we are describing, shout out if you can't find your answer after searching.
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"I‘d put my money on the sun and solar energy. What a source of power! I hope we don‘t have to
wait until oil and coal run out before we tackle that." Thomas Edison, 1847 — 1931
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