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Mitsubishi launches hybrid VRF system

Mitsubishi Electric has launched its refrigerant free City Multi Hybrid VRF system, which removes the need for leak detection equipment.

The technology operates without using refrigerant in occupied spaces, which Mitsubishi claims allows more properties to take advantage of manageable phased installation through the system’s modular two-pipe design.

At the centre of the new system is the HBC ( Hybrid Branch Controller) box, connected to an outdoor City Multi unit via traditional refrigerant piping.

Between the HBC and the indoor fan coils, the system uses water piping but is still able to deliver mild air-off temperatures and stable temperatures all-year round, accoridng to the company.

With no refrigerant in occupied spaces, the Hybrid VRF also enables simple compliance with BS EN378 and removes the need for leak detection equipment in any occupied room.

Each individual HBC can supply heating and cooling to 16 individual indoor units - using City Multi’s two-pipe system and including options for ducted, cassette and floor-standing models.

Two main HBCs and two sub units can be connected to the same City Multi outdoor unit to deliver simultaneous heating and cooling to up to 50 individual rooms or areas.

Sebastien Desmottes, product marketing manager for the company, said: “There is a lot of legislation impacting on the use of energy in the built environment and at the same time, there is a drive to look for new refrigerants to mitigate any harm to the environment.

“This will have a major impact on the industry over the next 15 years but in the meantime, we have to deliver systems that provide customers with a comprehensive choice to help them reduce emissions and running costs whilst meeting current and future legislation.

“BS EN378 in particular will restrict the amount of refrigerant that can be used in occupied spaces and we believe there is now a growing market for this type of system.”


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