Central Air Conditioners and Air-Source Heat Pumps U.S. shipments of central air conditioners and air-source heat pumps totaled 685,926 units in January 2021, up 27 percent from 540,179 units shipped in January 2020. U.S. shipments of air conditioners increased 32.6 percent to 408,831 units, up from 308,311 units shipped in January 2020. U.S. shipments of air-source heat pumps increased 19.5 percent to 277,095 units, up from 231,868 units shipped in January 2020.
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