I am thinking of upgrading my oversized 90,000 btu 5 ton Goodman 96% with the ECM motor furnace, to a smaller modulating one. I currently have the 5 ton choked down to the lowest first stage W1 with -10% on.
Being a Contractor I can get a good price on Amana, Rheem, and Trane. I understand the Rheem has 13 speeds, the Trane 3 speeds, and not to sure about Amana. I will be doing a manual j now that I have new windows and R50 in the attic.
My 2,600 sq foot house in Colorado, will need about 75,000 Btus input, with a 4 ton blower for the 3 ton AC. I am leaning twords the Rheem or Trane, since noise level is a big concern.
Please help me decide!!!! What are the pros and cons of modulating furnaces?