These high-powered, energy-efficient window ... size of the air conditioner and the size of the room you’re trying to keep cool. The Energy Star Most Efficient units at 8,000 BTU -- about ...

You can refer to The Spruce’s window air conditioning chart to determine the amount of BTUs required to cool your space. Best Overall: Midea 10,000 BTU U-Shaped Smart Inverter Window Air Conditioner ...

A 20-foot by 25-foot room is 500 square feet, and would require a 10,000- to 12,500-BTU unit. After selecting the right window air conditioning unit for your room and window size, it’s time to ...