Ground-source and air-source heat pumps are extremely efficient machines, writes, David Reynolds
I read Mary Massey’s letter (2 November) with some surprise. She said that her heat pump needs an annual service and that this year it cost about £350. My ground-source heat pump has been heating my house for 18 years and it does not need or get an annual service.
A heat pump is essentially a big refrigerator working in reverse, and how often do you have your fridge serviced? That is another benefit of heat pumps. It has no burner and so it is not continually deteriorating; nor is there a fire-safety issue.