Air source heat pumps are the way forward. They use one of the most renewable sources of energy on the planet – air – and typically require three times less energy than a gas boiler to supply the same amount of heat.
That incredible level of efficiency could cut your carbon footprint by 44%, and generally make you less dependent on gas – all for a reasonable price. You might also be able to save thousands of pounds with one of the UK government grants that are on offer.