Why so few UK homes are installing air-source heat pumps—and how to encourage takeup

Burning gas is a common but environmentally damaging way of heating our homes. Gas-fired heating systems produce up to the equivalent of 380g of CO₂ for each kilowatt hour (kWh) of heat generated. In general, for each kWh of heat generated, an air-source heat pump using energy from non-renewable sources could result in only half as much CO₂ emissions. And renewable sources would mean even less CO₂.