
The Hitachi Set Free Sigma Standard Efficiency FSXNSE is a versatile modular VRF system designed for both 2-pipe and 3-pipe configurations, offering exceptional installation flexibility for complex commercial projects. Engineered for efficiency and ease of maintenance, this system features a proprietary DC inverter scroll compressor and a unique Sigma-shaped heat exchanger, which together significantly enhance operational performance. With individual modules available from 8HP up to 24HP and the ability to combine units for systems reaching up to 96HP, it is a scalable solution suitable for various building sizes. Advanced features such as Smooth Drive Control allow the system to adjust capacity in precise 0.1Hz increments, optimizing energy usage at part loads. The system provides comfortable climate control with variable refrigerant temperatures to prevent cold drafts, and it maintains efficiency during heating and cooling operations with operating ranges reaching -15°C and -10°C, respectively. Compatibility with a broad range of Hitachi System Free indoor units, including wall-mounted, cassette, and duct-connected models, ensures that this VRF system can be tailored to meet diverse architectural requirements while supporting 'smart building' integration.
Use our free engineering tools to size, convert and diagnose your HVAC system.
Browse air conditioning calculators