The Hitachi SmartFlex VRF Gen II line includes a reengineered outdoor unit and a selection of single module sizes. The indoor unit line includes reengineered ducted units with greater static pressure, a range of multiport changeover boxes for heat recovery systems, and enhanced controllers. The line has an extended operating range: It can cool to an ambient outdoor temperature as low as -4°F with the low ambient kit for server rooms or other areas that require cooling year-round. The heating operating range extends from an ambient outdoor temperature of -13 to 59°F (-25 to 15°C). Single modules are now available in 6-, 8-, 10-, 12-, 14- and 16-ton capacities, enabling heat pump or heat recovery systems up to 36 tons to be configured.