As said, I don't fancy having a tank in the garden and also have a problem situating one with line of sight to the road.

Apart from that, I think that oil and gas are just as expensive as electricity nowadays, and the Kalirel system can install using the existing wiring so there will be no mess or upheaval like fitting a wet-system.

I'm thinking about a couple of photovoltaic panels on the roof but they will have to wait till the price comes down and efficiency gets better.