According to Capital Home Builders, a 2,300-square-foot home needs a 4-ton air conditioner. Since there are 12,000 BTUs per ton, a house of this size needs a 48,000-BTU air conditioner.
Choosing the correct size for a home air conditioner is essential for comfort. If it's too small, the house does not cool properly. However, an air conditioner that is too large makes a home too chilly and humid. The ducts used for air conditioning must be the correct size as well. Heating ducts are not always the right dimensions for cooling, and they are not always in the proper location. If air conditioning ducts are too small, they often add to the operating noise.