Q-ton | Mitsubishi Heavy Industries

A new generation, energy efficiency, hot tap water solutions for public applications.

What is the Q-ton?

The high efficiency Q-ton is an air-to-water heat pump using CO2 gas as a refrigerant, which can be used in a variety of applications for the supply of sanitary hot water. Q-ton has been featured as the world’s first two-stage compressor (combining rotary and scroll technology). It maintains high efficiency and significantly improves performance at cold outside air temperatures.

MHI’s design team launched this innovative unique air source heat pump to allow maximum efficiency, with minimal carbon footprint all controlled from a comprehensive touch screen panel. Currently with the increasing pressure of the use of low GWP (Global Warming Potential) refrigerant, we believe CO2 heat pump is the way forward to comply with future regulations as well as market trends.


Why the Q-ton?

Q-ton delivers outstanding performance and environmental benefits to a varied number of applications. Q-ton is exceptionally energy efficient which results in big reductions in both power and carbon emissions.

Q-ton uses safe and highly efficient CO2 as a refrigerant which is environmentally friendly as it is a natural gas and does not contain harmful cological impacts compared to other products using standard refrigerants.

Furthermore the Q-ton uses a constant hot water supply from 60°C to 90°C and maintains the full capacity at a very low ambient temperature. Therefore there is no requirement for external heating source and as a result this saves valuable installation time and costs

Discover below how a Q-ton can work in a VRF system.



  • High performance

    60°C to 90°C water supply even with outside temperatures as low as -25°C. The ability to maintain 100% capacity down to -7°C

  • High efficiency

    The industry’s highest coefficient of performance (4.3 in intermediate season)*. Massive reductions in both running costs and CO2 emissions.

  • Environmentally responsible

    GWP (Global Warming Potential) = 1. ODP (Ozone Depletion Potential) = 0.

  • Easy operation

    Advanced, but simple to operate touch screen panel with LCD. User-friendly schedule setting and one-touch fi ll up operation.

  • Long-term reliability

    High quality robust technology. High quality robust technology.

Q-ton absorbs ‘free’ heat from outdoor air and amplifies it to generate hot water swiftly and efficiently.

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