How much can an air source heat pump save you?
An air source heating system can reduce your energy bills considerably if you currently have an old or inefficient boiler.
It costs around £750 per year to run a pump for a 3-bedroom semi-detached house, and £975 per year for a 4-bedroom detached house. The Energy Saving Trust estimates these annual savings from an air source heat pump for a 4-bedroom detached house in England, Scotland and Wales:
Old (G-rated) gas boiler
£400 – 465
Old (G-rated) oil boiler
£460 – 545
Old electric storage heaters
£800 – 990
Old (G-rated) LPG boiler
£1,145 - £1,350
The EST also estimates annual RHI payments between £875 to £1,030 a year.