Look at your electricity bill - it should ideally show how much each unit of electricity is costing you in Kilowatt Hours (kW/Hrs).
Work out how many hours each day you might run your oil filled radiators during Spring, Summer, Autumn (Fall) and Winter
Add up the wattage in kW of the radiators you intend to buy.
Reach for a calculator and multiply them all together - One calculation for each season of approximately 90 days.
Add all the four totals together and divide by 360.
This will give you the average daily cost - which is a bit meaningless really.
Much will depend on the variables - How much power costs where you live - how well insulated your home is - what other heating you may have - how many radiators you intend to buy - how hot you like to keep your home - how long each day they will run etc etc.
Good luck with the calculations...
Peccavi, October 2009
