I replaced my bulky old unit with the sleek Windmill AC. It's quieter, cooler, and actually looks good in my apartment.

The Windmill Air Purifier could still reach that threshold in a bigger room, say, one that’s 400 square feet. If you check the fine print on Windmill’s site, that’s actually the rated room size.

July’s air conditioner (starting at $399) is compatible with slider windows (those that open horizontally), as well as single- and double-hung windows (those that open vertically). The AC has ...

The Windmill AC is great if you’re looking for an air conditioner that cools reliably, has smartphone controls, allows for scheduling, and looks nicer than standard window AC units.