FRIGIDAIR ENERGYSAVER AIRCONDITIONER WALL UNIT PORTABLE
Window vs portable air conditioner efficiencyĬompared to portable air conditioners, window units are engineering marvels: Most portable designs can’t even hit an efficiency rating of better than 7 or 8 in real-world conditions, and so a rating is rarely listed. The latest and most efficient variable-speed window units like this bigger model from LG or the brand-new Midea U-shaped unit rate as high as 14.7 and 15, but you’ll pay extra up-front to squeeze out that extra efficiency. As you can see, there is some difference, but it’s not very large. When we tested 8,000 BTU window air conditioners, we also tested the power draw on every cooling and fan setting with an electricity usage monitor.
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A big 14,000 BTU air conditioner should only use 1,250 wattsĮven the least-expensive units we researched for our review of the best window air conditioners got a score of 11, and all of our picks were rated 12 or 12.1.A mid-size 8,000 BTU AC should use fewer than 715 watts.For a small bedroom, a 5,000 BTU window unit should only use 450 watts.That works out to the following figures for popular sizes: The Department of Energy “Energy Star” rating is given to window air conditioners that rate better than 11.
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If you’re shopping for a window air conditioner, there’s an official standard for efficiency you should understand: the combined energy efficiency ratio, or CEER, which represents the number of BTUs of heat per hour an air conditioner removes for every watt of electricity it consumes.