Here you can see an estimataion of running costs for the heat pumps, based on the performance information collected using OpenEnergyMonitor.

Costs are calculated assuming UK fixed tariffs at the start of 2023, and presented in UK currency: electricity at 34p per kWh, gas at 10p per kWh.
Equivalent gas cost is estimated for a 85% efficient boiler producing the same amount of heat, with a comparative cost of 12p per kWh of heat.

  Property Heating system Annual Running costs 30 Days  
# Location Type Built Floor Area Make / Model Output Source Electric Per kWh Heat Equiv. Gas Daily cost Charts