Just received a call from a furnace guy that we had hired to perform seasonal cleaning on our Tempstar Superhigh efficiency 7000 unit which is approx.16 yrs old. He was concerned that he was getting temp reading in the heat run approximately 10 ft away from the furnace of 163 degrees. Temp reading on the door of the furnance was 190 degrees. He recommends we replace. Based on the temps and age of unit this makes sense to me. I have approx 1700 sg ft current furnace is sized at 100,000 BTU. He is recommending an 80,000 BTU unit.
Does this seem reasonable?