A window is the best option for venting a portable AC, but there are alternatives if a window is not available. Venting is critical; without it, the AC sends hot air back into the living space.

Get rid of musty smells and prevent them from reoccurring Keep the air conditioner free of moisture buildup to prevent mold and mildew from growing. Regularly clean the filter, drain pan, drain line, ...

Another heat wave—this one steeped in humid air, including from a Midwestern phenomenon called corn sweat—is blanketing the eastern half of the U.S. this week in July. Tens of millions of people are ...