How big of an air conditioner for house?

To determine the appropriate size of an air conditioner for your house, you need to consider the square footage of the space, insulation quality, number of Windows, and local climate. A common method is to use BTUs (British Thermal Units) as a measurement; generally, you need about 20 BTUs per square foot of living space. For a more precise calculation, consider factors like ceiling height and the number of occupants. Consulting with an HVAC professional can help ensure you choose the right size for efficiency and comfort.