Vaunting VRF: An Energy Slashing System Is on the Rise

Buildings, Jan. 2014, by Christopher Curtland.
http://www.buildings.com/article-details/articleid/16758/title/vaunting-vrf-an-energy-slashing-system-is-on-the-rise.aspx

"While [Variable Refrigerant Flow] VRF has been dominant worldwide for over 20 years, the U.S. has been slow to accept it for several reasons. Products have primarily been manufactured by Asian companies, which at one point had limited presence in the U.S. There is also little critical evaluation of actual field energy performance. But VRF sales in the U.S. are growing and multiple manufacturers offer these systems, including Carrier, Daikin, LG, Mitsubishi, and Sanyo."