Heat pump shipments in the United States totaled 208,592, up 22.9 percent from the same month last year, according to ARI.

The Air-Conditioning and Refrigeration Institute also reports that combined U.S. factory shipments of central air conditioners and air-source heat pumps for May totaled 681,980, down 7.1 percent from the same month last year.

Factory stocks for May were up 33,170 units from the previous month, but down 219,356 units from May 2005. Distributor inventories for May were down 26,303 units from April and up 132,766 units from May of last year.

April 2006 distributor shipments are up 1.1 percent from May 2005, with year-to-date shipments up 11.2 percent.