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A chiller is often the single largest consumer of power in a building, so it’s a logical place to look for reduced energy costs. Chillers expend excess energy when their compressors run at full-rated constant speed, a wasteful and unnecessary operating condition. Most chillers operate at partial load or are off 99% of the time. A chiller’s compressor motor is typically quite large, in the range of 150 hp to 600 hp. Money saved by operating the compressor motor more efficiently can add up quickly.

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