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Air to Water Heat Pump (Commercial use)

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

Q-ton uses the safe and highly efficient CO2 as a refrigerant, which is environmentally friendly as it is a natural gas and does not contain harmful ecological impacts compared to other products using standard refrigerants. Furthermore, the Q-ton provides a constant hot water supply from 60°C to 90°C and maintains full capacity at a low ambient temperature, therefore having the additional benefit of no requirement for a external heating source resulting in reduced installation time and costs.



The highly efficient Q-ton is an air to water heat pump that uses CO2 gas as a refrigerant and 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 both rotary 1 and scroll 2 technologies). It maintains high efficiency and significantly improves the performance of providing hot water at cold outside air temperatures.

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




The Q-ton heat pump absorbs ‘free’ heat from the outdoor air and amplifies it to generate hot water swiftly and efficiently and it can generate hot water up to 90°C without the requirement for an additional electric immersion heater. The Q-ton heat pump uses a coil of cold refrigerant that absorbs ‘free’ heat from the outside air and using its unique 2-stage compressor puts the refrigerant under high pressure in order to raise its temperature. An onboard heat exchanger then uses heat from the refrigerant to generate the hot sanitary water.


Q-ton seeks to provide energy, cost and carbon savings. It is at it’s most efficient when cold water is used to supply the heat pump, for that reason the cold water feed is provided to the heat pump, from the bottom of the stratified storage vessel.


In addition to the conventional hot water supply system, the space heating application has now been introduced in our CO2 air to water heat pump.


Q-ton provides efficent and clean space heating with low GWP (1) natural refrigerant (R744)
Thanks to the use of a natural refrigerant it becomes cleaner than any traditional type heat pump refrigerant such as R410A o R407C.
Its flexibility allows for it to be installed in many heating applications and its efficient as a replacement to traditional gas and oil boilers.

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