An air-source heat pump in an older UK terrace house

The gas boiler in our house has definitely been on its way out over the past few years; not only that, so have several of the radiators, and having lived all spring with them off to prevent leaking, the looming onset of summer’s end, meant it was time for decisions. Before: The combi boiler The cheapest option, would have been just to replace the gas boiler. But that’s no way to decarbonise your…