What size ac unit cools 300 square feet?

To cool a space of 300 square feet, you generally need an air conditioning unit with a cooling capacity of about 7,000 to 8,000 BTUs (British Thermal Units). This measurement can vary based on factors like ceiling height, insulation quality, and the number of Windows. It's essential to consider these variables to ensure the unit is appropriately sized for efficient cooling. Always consult with a professional for the best recommendations tailored to your specific situation.