It started out as a TV quote thread...ended up with a little of everything.
That thread died.
Time to start a new one
Your new furnace most likely has significantly more heating capacity than your old one, and has much higher airflow requirements.
I hope they increased your ductwork too.
Did they do a load calculation, or just replace input capacity for input capacity?
How to stop a Trane: Buy Westinghouse equipment; they make train brakes too.
See? Not so hard. Just a matter of switching suppliers.
I agree, sounds like a LOT of furnace for that house! Was a Manual-J Calc done on the home when you got a bid?
A static test should be done, and also temp rise.
The exhaust vent and cold air intake are 3"x 6' w 3 elbows
returns are 2-14"x8" and a 6" round
send vents 10"x8" , 10"x24", 18"x8"
Rheem was 80 vented to chimney .
If I am over sized what are my options . None of the 4 contractors did static tests etc. Looks like I have a bigger problem than a switch eh.
If the unit is sized properly and the ductwork is the problem, then you need new ductwork. But if the contractor never mentioned the need for ductwork, I would be asking for pretty good price.