After selecting the right window air conditioning unit for your room and window size, it’s time to cool down—your room ... is in the other room. Step 1: Measure your window.

In this helpful guide, we break down everything you need to know, including step-by-step instructions on how to clean an air conditioner and recommendations for the best equipment to use.

Negotiators from nearly 200 nations reached a historic deal to phase down emissions of hydrofluorocarbons (HFCs) — potent greenhouse gases used in air conditioners and refrigerators. The ...