RegGuheert
Well-known member
Are you sure?DaveinOlyWA said:your statement would imply they were equally efficient. that is far from the case. a heat pump is better than resistive heating but still not as efficient as A/C...
My understanding is that the main reason air conditioning is so efficient is that the temperature differential in summer between ambient and what is comfortable is smaller than that same differential in wintertime. Refrigeration systems are more efficient when working with a smaller tenperature differential. That's certainly true here: We rarely and barely need air conditioning at all to stay comfortable, but in wintertime we run our heat pump constantly.
But in places like Phoenix, it may be true that a heat pump would be more efficient in the wintertime than in the summertime simply because the temperature differential is larger in the summertime. Anyone have a heat pump in Phoenix?