> And if you have a modern condensing gas boiler it is considerably more efficient (over 90%) to burn gas in it than use electricity generated in even the most

> And if you have a modern condensing gas boiler it is considerably more efficient (over 90%) to burn gas in it than use electricity generated in even the most modern and efficient gas fired power station. If your grid is low carbon it might still break even (it will cost you money though). This is all relatively pointless minuitae though. The main advantage is it's faster so one should do it anyway as there's no downside. Unrelated, I've always been fascinated by the idea of a solid state heat engine driven kettle. Peltiers are so inefficient that it's not really pointful even as a toy though. I keep waiting for magnetothermal to be a thing.