The Airstage V-II VRF line of variable-refrigerant-flow (VRF) heat pumps now includes 6-, 8-, and 10-ton condensers. The V-II 230V/three-phase, zoned VRF systems offer large capacity, operational efficiencies up to 24.30 IEER (to AHRI 1230 standard) and are an ideal heating/cooling solution for small and large buildings. Airstage systems are now available from 6 to 24 tons with a connectable indoor unit capacity ratio of 150%, while also allowing as many as 45 indoor units per bank of three condensing units. High efficiency is achieved by using a single DC inverter-controlled, twin rotary compressor per condenser. The system also boasts a total pipe length of nearly 3,300 ft. Heating operating range spans ambient temperatures from 70 F to as low as -4F, while some single systems provide cooling when ambient temperatures fall to as low as 5F.