Re: How much to run Electric Aga?
It would see on lightly that an electric Aga would be cheaper to run, but maybe with Night Saver.
You should be able to get the Kw ratings for both and then do the maths.
eg.
Kw required to run the electrical Aga for an hour and its efficiency.
Kw required to run the gas Aga for an hour and its efficiency.
The efficiency for the electrical Aga would be close to 100%, but less for the gas (as heat is lost out the flue). Agas could be more complex as they lose a lot of heat to the room.
Then you work out the cost per Kw for electricity (don't forget Night Saver rates) and the cost per Kw for Gas, taking into account their efficiency.