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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: We’ve been in a heatwave, so we’ve had the AC on. When I went outside earlier, I noticed that the outside AC unit wasn’t running. Why is my outside AC unit not turning on? A: During the hot summer ...

Why do window ACs actually need a window? On the surface, it feels unnecessary — after all, the unit is clearly designed to blow cold air from the front. Why can't you just set it on the floor like a ...

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 ...

As is the case for many people, my home cannot be retrofitted with central air. My 100-plus-year-old Brooklyn apartment, which features prominently in my seven years of air quality reporting for WIRED ...