Johnson Controls-Hitachi Air Conditioning Europe is launching an innovative new range of modular VRF units for 2018 under the Hitachi brand. Called Set Free Sigma, the outdoor units for 2-pipe Heat Pump and 3-pipe Heat Recovery will replace the existing Set Free VRF units and will be produced in the company’s European manufacturing facility in Spain.

New and Extended Line Up
Available from 5 to 24HP in a single unit module and up to 96HP with combinations, the outdoor unit casing has been completely redesigned and offers a total of seven new capacity models – 18, 20, 22 and 24HP (Standard) and 14,16 and 18HP (High Efficiency). This extended line up achieves higher power combinations from fewer units, requiring fewer connections and delivering improved installation flexibility – meeting the needs of specifiers, installers and end users.

150 per cent combinability
All units are compatible with Hitachi’s System Free indoor range, with comfort (cold draught) protection available as standard across the range. The High Efficiency FSXNPE model combinability ratio has been extended to 150 per cent with up to 64 connectable 0.4HP or 0.6HP indoor units.

Low environmental footprint
Using R410A refrigerant, the full Hitachi Sigma VRF range benefits from a new high efficiency DC inverter compressor for precise control by 0.1Hz increments which achieves a 4.6 per cent increase in seasonal efficiency over previous models. Combined with a new fan design, bell-mouth fan housing and sigma-shape heat exchanger, the Set Free Sigma VRF range achieves improved efficiency even at low or partial load in cooling operation, with performances increased to achieve SEER up to 8.33 and SCOP up to 5.06.

Hitachi Air Conditioning Europe SAS say the new Hitachi Sigma VRF models deliver increased installation flexibility and, when combined with our changeover boxes and valves, enables both 2-pipe heat pump and 3-pipe heat recovery from a single unit for buildings where heating and cooling are required simultaneously,”

Hitachi’s new Set Free Sigma VRF range is available from Hitachi Direct Sales in the UK and Ireland and its approved distribution network.

Chillaire Limited have been an approved supplier and installer of Hitachi Air conditioning Systems for the past 20 years. For information on the new Hitachi Range please call us on 024 7624 9440 or email us at

Chillaire, Patani House, 16 Lythalls Lane, Coventry. CV6 6FG

Air Conditioning - Heating - Ventilation