currently using a Goodman 24000 BTU Central air, installed in '96. it is starting to cost too much because of leakage of refrigerant. I did the size calculator thing and it recommends a 30000 BTU unit, but that size just doesn't seem right (24000 all day sometimes to cool down from the mid to upper 80's °F to 78 °F). I think that it's too small, and think it should be larger. I am looking at a 36000 BTU system, but someone else said that is too high for the square footage.
My main floor is 1100 SF and the basement is too, (2200 SF). I cool both and calculated that in, that's why I think 36000.
1 calculator says use a 2.5 ton, but if you use the oven a lot, to bump it up 1/2 ton more. My wife and I both cook a lot.
What do you think?
In 96 it still took 4 or more hours to drop the temp 6 degrees. Its been recharged 2 times since it was installed, 1 capacitor replacement. The last recharge cost $225, 2 years ago. The furnace however has had 4 controller boards, 3 temp sensors, and 2 blower motors. That is why I am looking for a replacement for both. The furnace size is not an issue, only the question about the AC size. I just don't want to get an AC too big and cool the house, before it removes the humidity and then have that issue to deal with, although I could run a dehumidifier if it's too big an air conditioner. My house has 2 big trees, for now, one on the East and one on the West, but the one on the West will need to be removed in the next 2 years. That is why I think I'll need the 3 ton, vs the 2.5 ton. The West side has a big sliding glass door, but all the windows are double glazed and low E glass.