For 2020, we ran the machines in a sealed 135-square-foot (10 feet by 13.5 feet) basement office at WirecutterвЂ™s New York headquarters. WeвЂ™ve tested dehumidifiers multiple times, in multiple ways. That said, if you donвЂ™t mind manually emptying a tank (which may be necessary several times a day) or can send the water down a basement-floor drain via a gravity-fed garden hose, the otherwise identical, pumpless Frigidaire FFAD5033W1 is a less expensive option. And we like the versatility its pump affords: All dehumidifiers have to be regularly drained of the water they remove from the air, and the pump lets you automatically direct the water into a sink or out a window. It is Energy Star rated, and it has several nice design details (such as a lay-flat carry handle and built-in cord storage) that make it easy to move around your home and to store in dry seasons.

Upstairs, it can maintain the humidity in spaces as large as 1,200 square feet at conditions that are comfortable for most people. The Frigidaire FFAP5033W1 is powerful enough to drop damp cellars to less than 50% humidity-which helps to inhibit wood rot, mildew, and other infestations that can damage your home and trigger allergies.

Edison 25 dehumidifier manual