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Quietest Pick: Dreo Ultra Quiet Inverter Window Air Conditioner, $319.99 with ticked coupon (Orig. $399.99) Amazon. Dreo Ultra Quiet Inverter Window Air Conditioner.
Friedrich Chill Premier 10000 BTU Smart Window Air Conditioner CCF10A10A. Best for: Large rooms This model can cool a 400- to 500-square-foot space with ease thanks to its 10,000 BTUs and eight ...
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Q-Star: Introduced in 1990, these portable room air conditioners with slide-out chassis were produced until 2012. The Q-Star had other variations, such as K-Star (ultra quiet), X-Star (digital) and TwinTemp (heat/cool). [12] The Q-Star was replaced by the "Q" chassis Kühl models in 2012.
Innovations in the latter half of the 20th century allowed more ubiquitous air conditioner use. In 1945, Robert Sherman of Lynn, Massachusetts, invented a portable, in-window air conditioner that cooled, heated, humidified, dehumidified, and filtered the air. [37] The first inverter air conditioners were released in 1980–1981. [38] [39]
Lennox has three different series of air conditioners, Elite, Dave Lennox Signature Collection and Merit series. [1] The Merit series is the lowest cost Lennox air conditioner, and there are 4 models of Single-stage with a 13, 14, 15 or 16 Seasonal energy efficiency ratio (SEER) rating. [2]