The article from Wired.com looks at how many British churches, often large, historic, and inefficient to heat, are embracing electric heat-pump systems to replace boilers running on oil or gas.
It begins with a case study of St Mary’s Church, Lawford in Essex, where a new air-source heat pump prompted a thanksgiving service. The shift came after the previous wood-chip boiler became too costly and unreliable.
Key motivations include environmental stewardship—congregations argue that caring for creation aligns with their faith—as well as financial pressures. Many churches are part of the Church of England’s goal to reach net-zero emissions by 2030, and decarbonizing heating is one major piece.
Technical challenges abound: old churches often have poor insulation, high ceilings, and large volumes of space, which makes low-temperature heat distribution (typical of heat pumps) harder. One church traced more than 400 bone fragments when digging trenches for ground-source tubing, highlighting constraints in historic grounds.
Still, some systems report strong performance: Coefficients of Performance (COPs) of around 3 to 4 are cited, meaning each unit of electricity delivers three to four units of heat. Some projects are pairing heat pumps with solar panels and battery storage to further reduce running costs.
The article concludes that while not all churches are well-suited for heat pumps yet (especially very remote or infrequently used buildings), many see this as a scalable path. As one installer put it: if a 200-year-old stone church can make it work, many others can too.
A blend of faith, economics, and engineering is driving an inspiring retrofit movement in Britain’s places of worship, proving that even heritage buildings can join the clean-energy transition.