The Evolution central air conditioner from Bryant is comprised of three models: 180B, 186B and 187B. These Energy Star-qualified units reportedly emit noise starting as low as 68 decibels, making them essentially as quiet as a vacuum cleaner. This is in part due to the AeroQuiet System II, which provides sound-dampening properties in the cabinet and fan among other things. The units all feature two-stage scroll compressors, Evolution™ diagnostic controls, and DuraGuard Plus for exterior durability and protection from the elements. The Evolution series models come with SEER ratings that range from up to 16 SEER for the 186B to 20 SEER in the 180A model. The models offer a range of cooling capacities from 1.5 to 5 tons.
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