What is CoP?
The performance of a heat pump is often shown as the CoP or Coefficient of Performance. This relates to the amount of energy that is extracted from the ground for each unit of energy used to run the pump.
A heat pump could provide between 3 and 5kW of heat for each kW invested.
As an example if 3kW is provided by the electrically driven heat pump and 9kW is provided by the ground source the CoP would be 4. This equates to the total energy provided, in this case 12kW, divided by the electrical energy from the heat pump, in this case 3kW, giving the CoP of 4.