If a tower fan just won't cut it, a powerful window air conditioner is a quick way to get your space nice and cool so you can ...

The best air conditioners efficiently and quietly cool your space. These are the best window and portable units for bedrooms, ...

For example, a 12,000-BTU air conditioner that uses 1,200 watts of electricity has an EER of 10. Generally speaking, window AC units typically have ratings between 8 and 12.