Back-up for heatpump
Swaffham Prior is located nearby Cambridge and is UK´s first zero carbon heat network that offers green heating alternatives to oil. This is run by air source and Ground source heat pumps together with a 30MW solar farm.
Electric boilers work together with the air source heat pump during summertime and the ground source heat pump during winter. The third boiler provides for the peak load heating instead of oversizing with heat pumps.
They all work together to fill the thermal storage for 200 000 litres that they have.