What size central air conditioner for 1150 sq ft house?

For a 1,150 square foot house, a central air conditioner typically requires between 2 to 3 tons of cooling capacity, depending on factors such as climate, insulation, and ceiling height. A general rule of thumb is to allocate about 20 BTUs per square foot of living space. Therefore, a unit with a cooling capacity of around 24,000 to 36,000 BTUs should suffice, but it's best to consult with an HVAC professional for a precise assessment based on specific conditions.