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

Energy Star labels mean devices use less energy and excel at cutting bills. Here's what to watch when shopping for home tech ...

If you've ever installed a window air conditioner ... and it's one of two ACs to earn Energy Star Most Efficient Certification. Read next ...

A 5 star split AC offers efficient cooling with low energy use, making it an ideal pick for homes and offices. With electricity costs on the rise, these ACs help cut down on bills while keeping ...