![]() According to CR’s brand reliability survey, two brands-Frigidaire and Honeywell-earn a top rating of excellent for predicted reliability, and two other brands receive a score of very good. By comparison, the best window air conditioners can cool the room by 10° F in about 15 minutes or less.īut the news about portable ACs isn’t all bad. In our air conditioner tests, we measure how long it takes a portable model to lower the temperature of a test chamber from 90° F to 85° F. “It’s difficult to compare the cooling to a window AC.” “You may not be getting what you think when you buy a portable model,” says Chris Regan, who oversees CR’s air conditioner tests. It’s a struggle, then, to maintain a comfortable temperature. That creates negative pressure that causes warm, unconditioned air from nearby rooms or the outdoors to flow into the room you’re trying to keep cool. Unlike a window AC, which uses outside air to cool the coils on the outdoor part of the unit, a single-hose portable AC uses conditioned air from the room it’s sitting in to cool the mechanicals. Sleep Innovations Shiloh 12-Inch Queen Mattress for $449.The upside of a portable air conditioner-that it isn’t bolted to a window-is also its downside. ![]() Instant Pot Pro 10-in-1 6-Quart Pressure Cooker for $149.95 (Save $20.04).Hotel Sheets Direct Queen Bamboo Sheets for $63.41 (Save $35.59).SafeRest Queen Premium Mattress Protector for $34.19 with on-page coupon (Save $10.58).Big Red Rooster White Noise Sleep Machine for $23.74 with on-page coupon (Save $6.25). ![]()
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