Variable Refrigerant Flow Systems

Variable refrigerant flow (VRF) systems, which were introduced in Japan more than 20 years ago, have become popular in many countries, yet they are relatively unknown in the United States. The technology has gradually expanded its market presence, reaching European markets in 1987, and steadily gaining market share throughout the world. In Japan, VRF systems are used in approximately 50% of medium-sized commercial buildings (up to 70,000 ft² [6500 m²]) and one-third of large commercial buildings (more than 70,000 ft² [6500 m²]).

Citation: ASHRAE Journal, vol. 49, no. 4, April 2007



Product Code(s): D-AJ07Apr2