Lights, maybe, but I doubt they do for their stoves. And “furnaces” (a en-US term which I guess is approximate to a gas boiler) are nearly always measured in te

Lights, maybe, but I doubt they do for their stoves. And “furnaces” (a en-US term which I guess is approximate to a gas boiler) are nearly always measured in terms of the units of gas they consume in the UK, not their power output.