I recently bought a new house and with it came, of course, a builder grade furnace. It's the 340AAV 060080. I believe this to be the Bryant Legacy Line 90 furnace. It's A/C ready and has some CNPVP4221ATAABAA coils? on the top of it (i'm not sure that matters or not). I'm going to have a heat pump installed and originally got really excited about the evolution brand and the thermostat. It seems I got too excited and my furnace is going to be the efficiency bottleneck and that it might dictate the right heat pump combination. Sad, I like top of the line stuff too...
I live in Portland Oregon, so aside from a month in the summer of hot and a month in the winter of cold, we are a pretty mild climate. The heat pump location will be 15 feet from my deck, so a quieter unit would be nice.
With that, how high on the heat pump line should I go before it's economically foolish due to my climate and/or my builder grade 340AAV?
Thanks in advance!