Quote:
Originally Posted by AC_Hacker
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It's interesting. If you look at that report, they are using running temps well in excess of our needs in the resi environment. The COP is around 1.6 and while there are savings to be had, I think a resi gas HP switching between ASHP and propane or NG (when needed) could have a COP of 5 and eliminate the ground loops. Also note they don't even look at it running at ambient temps anywhere below freezing
I find a lot of engineering articles still use water temps and boilers running at what we would have seen 20-30 years ago. 80% efficient copper fin boilers, as though they have never heard of low temp radiation or condensing equipment before. So much for real energy reduction.
