Heat Pump Shipments Jump 20 Percent in May

United States shipments of air-source heat pumps increased 20 percent, to 265,129 units, in May 2014, up from 220,895 units shipped in May 2013, according to statistics from the Air-Conditioning, Heating, and Refrigeration Institute (AHRI). U.S. shipments of central air conditioners increased 4.1 percent, to 554,348 units, up from 532,542 units shipped in May 2013.