A new survey has cast doubt on the cost-efficiency of heat pumps, with two-thirds of owners reporting higher heating bills. The Censuswide poll of 1,000 heat pump owners found that 66 per cent said their homes were more expensive to heat compared to their previous system. Only 15 per cent reported lower costs, while 19 per cent saw no difference or were unsure.
Heat pumps, which run on electricity, are far more efficient than gas boilers, producing three to four times the energy they use. However, the cost of electricity per unit is around four times higher than gas (28p/kWh vs 6p/kWh), often making heat pumps more expensive to run. Upfront costs are also higher, with installation averaging £13,200 compared to £3,000 for a gas boiler, though government grants of up to £7,500 are available.
Dale Vince, owner of Ecotricity and the Green Britain Foundation which commissioned the survey, said households are being “mis-sold” heat pumps. He noted that only those in modern, well-insulated homes see minimal bill increases, while the reality for most is an expensive disappointment.
Actual savings depend on the boiler being replaced. According to the Energy Saving Trust, replacing an old G-rated gas boiler saves £260 a year on average, while replacing an A-rated gas boiler results in a £40 loss. For oil boilers, replacing a G-rated model saves £65, but an A-rated replacement leads to a £220 loss.
A government spokesperson defended the technology, stating that with a time-of-use tariff, heat pumps can save households £130 a year compared to gas boilers. They highlighted the Warm Homes Plan, backed by £15 billion, to help households access benefits and savings from home upgrades.
