Log burners are also very useful if you have a power cut. We have a 7kW fire that can keep our old 2 bed semi heated, without any other heating.Yes, thinking of an alternative heat source for next winter, I don't fancy being held to ransom by uncertain gas supplies
We can heat water for drinking on various gas rings, BBQs and even the top of the log burner. Although I haven't had to try these out yet, in theory I could run our oil boiler with a generator, or a spare battery and invertor (although not for very long).