I am getting various bids to replace the downstairs A/C system on my house. It's hard to compare them because I'm getting a bunch of conflicting info about sizing.
The guy I had out yesterday told me that a) my 3 ton unit was too big for the 1300 sq. foot. downstairs, and b) that my evaporator coil and condenser were mismatched (1.5 vs. 3 ton). He recommended going down to a 2.5 ton unit, and because of the mismatch he recommended changing the coil out as well. Of course from there it didn't take long before he recommended doing a full system replace "with the furnace thrown in for free if you get our premium unit."
-- I've lived in this house for 18 years and have not noticed any ill-effects due to the supposed excessive capacity downstairs unit. In particular, no short cycling. Should I downsize to 2.5 tons, which would be the same size as my upstairs unit? I've read some of the other posts, and I know that square footage doesn't tell the full story. If there's another factor which caused the initial system to be spec'ed at 3 tons, I'm worried that I may regret downsizing.
-- And what about the fact that I've supposedly been using a 1.5 ton coil (Lennox C16-21-00-1) all this time? How important is it that they match? Again, I haven't noticed any ill effects, and I'd rather not mess with the inside stuff if I don't have to. It seems to me that if I *do* downsize the outside unit to 2.5 tons, then at least I'll be making positive progress by reducing the amount of mismatch!
Any advice appreciated...