I am replacing my 40+ year-old gas furnace, and I have two estimates from two contractors. But I don't know -- is a Bryant 80% furnace better/more reliable than a York Affinity 80%? How about their 90% units?
They also quoted me other choices -- two-stage or single stage, variable speed, etc. Are there rules of thumb as to when a two-stage furnace is worth it and when it is not? Or when a variable speed fan is worth it?
I live in Virginia, if it matters.
Thanks for any help you can give me.