The cooling capacity of an air conditioner is typically measured in British Thermal Units (BTUs) per hour. The amount of cooling capacity needed per square foot of living space depends on several factors, including climate, insulation, ceiling height, and the number of occupants. As a general guideline, you can use the following estimates to determine the cooling capacity required:
For a moderately insulated space with average ceiling height:
- 20 BTUs per square foot for a hot climate
- 15 BTUs per square foot for a temperate climate
- 10 BTUs per square foot for a cool climate
For a well-insulated space or a space with high ceilings:
- You can reduce the cooling capacity estimate by around 10%.
For spaces with many occupants or heat-generating equipment (computers, kitchen appliances, etc.):
- You may need to increase the cooling capacity estimate by 600-800 BTUs per additional person or heat-emitting device.
Keep in mind that these are general recommendations and can vary based on individual circumstances. It's always advisable to consult with a professional HVAC technician or use an online BTU calculator to obtain a more accurate estimate for your specific situation. Factors such as windows, orientation, shading, and local climate conditions can also influence the cooling requirements.