is 96% vs 80% worth it???
I need to make up my mind about a 80% furnace and a decent AC vs a 96% Carrier Infinity and a good AC system. Difference is ~$7000 vs $10000. For those of you who upgraded to a high efficiency furnace, did you find the savings worth it? It seems to me that I would have ~10 year payback period for the extra 3K.