The Windmill was the top-performing AC unit in our tests, outperforming all other window and portable units. It dropped from 90 to 72 degrees Fahrenheit the fastest and maintained a temperature between 65 and 71 degrees Fahrenheit the longest.

The unit has three modes: cooling, fan, and dry. Cooling and fan are pretty straightforward while dry actually turns the unit into a dehumidifier. So, when you don’t actively need it, feel free to have it run in moist spaces like your laundry room or garage.

A room air conditioner can make a sweltering space comfortable again, especially in older homes, apartments, and additions where central air falls short. The bigger challenge is choosing between a portable air conditioner and a window air conditioner ...

Among all the portable AC units -- both large and small -- that we tested in our lab, this 14,000-BTU unit performed best. We heated the room to 90 degrees and the Dreo was able t

The magnetized remote and the whisper-quiet sleep mode are just a few features that enhanced my experience.

If you want a powerful unit that gets the job done, the Honeywell HX series is one of the best portable air conditioners I’ve tested. In use, it’s properly punchy. The airflow is strong enough to turn a hot, stuffy room into something genuinely comfortable within minutes, and it feels more powerful than some similarly priced rivals I tested.

Key Points 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.

A room air conditioner can make a sweltering space comfortable again, especially in older homes, apartments, and additions where central air falls short. The bigger challenge is choosing between a portable air conditioner and a window air conditioner ...