I am in the process of replacing my entire central air system and need advice on sizing. My present 20 yr old York unit is a 140,000 BTU (90% unit). I was informed by a contractor that none of the major maunfactureres make over a 120,000 BTU gas furnace for residential use. He said the the new 120K BTU units are equivilent to the old 140K BTU units because thay are more efficient. Is this true? My house is roughly 3300 square feet.
Thanks in advance for your help.