ARLINGTON, Va. — United States shipments of central air conditioners and air-source heat pumps totaled 673,360 units in April 2015, up 3.8 percent from 648,404 units shipped in April 2014, according to the latest statistics from the Air-Conditioning, Heating, and Refrigeration Institute (AHRI). U.S. shipments of central air conditioners increased 5.3 percent, to 456,072 units, up from 433,078 units shipped in April 2014. U.S. shipments of air-source heat pumps increased 0.9 percent, to 217,288 units, up from 215,326 units shipped in April 2014.

Year-to-date combined shipments of central air conditioners and air-source heat pumps increased 12.2 percent, to 2,304,780 units, up from 2,054,421 units shipped through April 2014. Year-to-date shipments of central air conditioners increased 13.2 percent, to 1,477,251 units, up from 1,304,904 units shipped during the same period in 2014. The year-to-date total for heat pump shipments increased 10.4 percent, to 827,529 units, up from 749,517 units shipped during the same period in 2014.