What size air conditioner for a 1500 sq ft house?

For a 1500 sq ft house, a central air conditioning unit typically needs around 30,000 to 36,000 BTUs (British Thermal Units) of cooling capacity. However, factors like ceiling height, insulation quality, local climate, and the number of Windows can affect this estimate. It's best to consult with an HVAC professional for a precise calculation tailored to your specific conditions.