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The installation of the equipment is very similar. Here are some elements to note:  

  • The heat pump will generate the hot water which is pumped around the heating circuit to the hot water tank.  
  • The heat pump in many cases is a monobloc unit and is precharged with the refrigerant gas, so there is no requirement for F-Gas trained engineers.  
  • Many heat pump manufacturers provide pre-plumbed hot water tanks which only need to be connected to the heat pump and the heating circuit with pumps, motorised valves and controls already connected.  
  • Heating controls are via the manufacturer’s control system or by third party controls such as timer clocks, room thermostats and thermostatic radiator valves. 

The key difference is the temperature of the hot water generated. The majority of heat pumps generate flow temperatures for the heating system at around 40-45°C and hot water at around 50-55°C. Therefore, radiators will need to be larger in size or underfloor heating is used; the hot water tank will require a larger surface area of coil. Some manufacturers offer high temperature heat pumps.