EPC Ratings and Boiler Impact
An Energy Performance Certificate (EPC) rates your home's energy efficiency from A (most efficient) to G (least efficient). The heating system has a major impact on your EPC score.
How Much Does a New Boiler Improve EPC?
Replacing a G-rated old boiler with a modern A-rated condensing boiler can improve an EPC rating by 5–15 SAP points — often moving a property from E to D, or D to C.
Why EPC Matters
- Rental properties must achieve minimum E rating (legal requirement)
- Higher EPC = lower energy bills
- Higher EPC can improve property value
- Some mortgage products offer better rates for high EPC homes ('green mortgages')
Other Heating Improvements That Boost EPC
- Adding thermostatic radiator valves
- Fitting a programmer and room thermostat
- Installing a smart thermostat with weather compensation
- Upgrading to a heat pump (major EPC improvement)
#EPC#energy performance#efficiency rating