Question: how much central air conditioning do i need?
Answer: So for instance, a 1,500 square foot home would look something like this: 1,500 X 30 = 45,000. 45,000 / 12,000 = 3.75. 3.75 – 1.0 = 2.75 So you'd need a 2.5 or a 3-ton sized central air conditioning unit.