Hi everyone & thanks for your thoughts.
We've had 3 different contractors come in and look at our ~20 year old gas furnace and provide quotes. The question I can't seem to get a straight answer on is what size furnace to get.
Our current 80% efficiency gas furnace is rated at 100k which means it puts out 80k BTU. Ok, I understand that. The new system is rated at 95% efficiency, so do I get a 80k or 100k two-stage unit? The smaller 80k unit (as recommended by 2 contractors) will give us nearly 76k output which is slightly less than we have now, but the larger furnace will give us 95k which is well over - and from what I understand, oversizing these units will lead to problems down the road. The contractor recommending the larger one says the smaller one will not put out enough heat.
We live in the Mid-Atlantic so winters are reasonable.
System looking at on the 80k side:
Trane XL15i A/C - 4TTX5036A1000C
Trane XV95 furnace - TUH2C100A9V4VA
Aspen Coil - ACE36D44210L015