Timber clad house

The MasterTherm BoxAir Inverter is a compact air source heat pump available in outputs of 2-35kW.  Equipped with inverter technology, the BoxAir has an extended lifetime compared to fixed output heat pumps and delivers excellent efficiencies which achieve a significant decline in operating costs (up to 30% more).

In most cases, no buffer tank is required which saves boiler room space and installation costs. The BoxAir is sound insulated and has state of the art DC fans, low noise impellers and modulation flow, ensuring it’s one of the quietest air source heat pumps available.


  • 7 years warranty
  • Compatible with time of use electricity tariffs for automatic energy bill savings of up to 35%
  • Low noise output
  • Inverter technology for increased unit lifespan and reduced operating costs
  • Smartphone app control
  • Solar thermal integration
  • Active cooling capability meaning no need for a separate air conditioning system
  • Simultaneous heating and cooling (provide heat to one area of your home whilst cooling another)
  • Weather compensation
  • Output water up to 60°C
  • Compatible for the heating of swimming pools
  • MCS Accredited and valid for the Renewable Heat Incentive (RHI)
  • Wide range of sizes and outputs to suit properties of any size
  • Customise to any RAL colour
  • Low maintenance
  • Built with premium components from world leading manufacturers


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