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leisure design & build bulletin - November 2016

Q-ton Air-to-Water - New-generation, energy-efficient CO² heat pump
Mitsubishi Heavy Industries

Q-ton Air-to-Water - New-generation, energy-efficient CO² heat pump
  • Sanitary hot water (65-90°C) even in cold temperatures
  • Natural refrigerant (CO²)
  • Up to x6 more efficient than a gas boiler
  • Up to 50% less CO² than a gas boiler
  • 3,000 to 100,000L /day configurations
  • Easy-to-use touchscreen controller


Carbon dioxide (CO2) hot water heat pumps are relatively new on the market and have the ability to deliver sanitary hot water at 65-90°C very efficiently. They can offer significant carbon and energy savings potential compared with hot water boilers.

Q-ton is specifically designed to transfer heat from the ambient air into a water heating system. The refrigeration system uses carbon dioxide as the working fluid. It can be used to provide sanitary hot water in a wide range of buildings.

How it works

  • Systems can be specified from one 30kW Q-ton unit giving 6,000 litres of hot water/day, to up to sixteen heat pump units in a modular configuration of 480kW, connected to substantial hot water storage tanks.
  • Touch screen controller makes the system easy to operate.
  • Hot water production and availability can be monitored via a user-friendly graphic display.

Who it’s for

Q-ton is suitable for any applications using sanitary hot water in excess of 5,000L per day. Typical applications:

  • Hospitals
  • Hotels
  • Care Homes
  • Fitness Centres
  • Universities
  • Restaurants
  • Laundries
  • Food Industries
  • Camping Sites etc.

The benefits

  • Substantial reductions in running cost (40-75%)
  • Substantial reductions in CO² emissions (45-75%)
  • Suitable for new build and retrofit
  • No need for heating back up
  • CoP of 5 (produces 5kW of energy for every 1kW of electricity)

For more information, please click below.

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