We had a heat pump installed in the house earlier this year. With frost on the ground yesterday, it’s been tested in lower temperatures for the first time and is doing just fine. The house is warm and maintaining a steady temperature, and we’re spending less on energy than we did with the gas boiler.

With the heat pump in and running on electricity, the remaining gas infrastructure in the house is obsolete. Not that there’s much of it left. There are some pipes in the walls and under the flo...