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 ...

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.

The best window AC units of 2026 from brands like LG and Windmill can help you ride out even the most brutal heat waves.

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

Portable ACs can work with casement windows but need a special adapter to seal the vent properly. Casement windows' swing and lack of flat windowsill make them incompatible with most window unit ACs.

Buying a new AC can be confusing, especially when deciding between a split AC and a window AC. Both are designed to cool a room, but they are different in terms of cost, installation and power ...

Although air conditioning units are generally subdivided into a number of categories, including window, split and whole house/building units, they still work the same, with the compressor, condenser ...

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 ...