Yup...you're right, but just having some fun in the wake of nothing new.
Oh and I haven't figured out yet if any kind of heat movement is occurring in the water heater. I don't think so, thus a COP of 1.0 (or 100%) will be the maximum efficiency here.
All that to say the original poster was effectively right for our WDRP situation, but had some fun getting here...and maybe a little education for those unengineers.
In the absence of that which is not, that which is, is not.
