DIYer and woodworker April Wilkerson installs a window AC unit in her workshop for improved cooling.

Q: I am renting a small, old home without central air conditioning. I have a window air conditioner, and the past few years I’ve awkwardly filled in the space around it with a large piece of plywood.

Choose the right type of air conditioning system to keep your home comfortable this summer ...

The first time I installed an air conditioning unit—heaving and wedging it with no small effort onto the sill of a fourth-floor bedroom window—I was shocked that more units don’t fall out and plummet ...

We got our hands on multiple units and looked for models that are quiet, energy-efficient, and easy to install.

The best window AC units of 2026 are both powerful and energy-efficient. Our top five picks include quiet models from LG, ...

Trying to choose between a portable AC and a window air conditioner? Experts break down the pros, cons, cooling power, and ...

Lee Wallender is a home improvement writer of nearly 20 years and specializes in home remodeling, repair and maintenance. Cassidy was an updates editor whose main responsibility is to write and edit ...

Installing a window air conditioner is typically a straightforward DIY process that can quickly transform a muggy room into a much more comfortable space. If you have any questions about your specific ...