I have two quotes that are roughly the same for a Goodman 70k BTU 95% efficency and a Bryant 95t 80K 96.2% efficency. I am leaning towards the Goodman because the company installing guarentees their work and will cover any fixes if need be. The company with the Bryant requires you to purchace an extented warranty that covers labor, but the parts are covered by the manufacturer warranty.
Also, my house is about 2500 sq ft, built in 1991, so i think the isulation is pretty sound. Its two stories and a half basement, but the upper level is smalle than the lower, so not a traditional two story. There is alot of wasted space in my house- tall ceilings, open foyer, totally nonfunctional windows and walls that give the "illusion" of being huge house... I'm just saying this becasue neither one of the contrators did a load estimation, or J count, or whatever... so i am concerned if the size is going to be adequete because the current furnace is a 110K 70% efficency. This is my first winter in this place, so I have no idea how well the old one worked...
I really dont know which of the two is going to be my better bet, but from my tiny little slice of HVAC knowledge it seems that an oversized furnace is worse than an undersized?, becuase it will keep going on/off/on/off etc etc. And a too small furnace would likely have trouble keeping up with demand only on the very coldest of days?
Any advice, comments, suggestions and/or corrections to my thought process are welcomed! Unfortunately I am under pressure to make a choice because my current furance is not functioning at all.. and I really have nooo clue about any of this stuff.
Thanks in advance