1989 - When we had our AC installed we were advised to go with a 2 ton as the 2.5 ton would be too powerful and dry out the air too much. 25 year old house. 1,800 square foot back split with cathedral ceilings.
Move ahead to 2008. We are replacing both our furnace and AC. The problem with our current AC is that when we get temps of 30C (86F) with a humidex of 38C, the current AC just can't get the house down below 25C.
This is what we are going to be going with in either the Bryant or Carrier line.
Bryant Preferred/Carrier Perfomance AC Units
Bryant 355CAV/Carrier 58MVC Furnace
Bryant Evolution/Carrier Infinity Control
With newer technologies would you recommend staying with 2 ton or moving up to 2.5 ton? The only other figure I have is the design heat loss is 66,200 BTU/hr. at -25C.