Well the oil I'm burning at the moment only cost 45p/l, mind you that is fecking expensive compared to the 17p/l when we first moved here
11 years ago. Insulation is not good, it is also drafty, I am very glad that when it was -10C min and maxs of -3 or less it wasn't also windy. A windy week in winter produces a real spike in oil consumption, 225l/week is not unknown so 125l/week is getting away lightly.boiler.
If you have E7 and you are heating water by oil at current oil prices the off peak lecky option is quite likely to be the cheaper. It depends on your useage of hot water, one bath and the average tank of HW is gone.
I reckon that our oil use for HW alone is about 1000l/year or
10,000kwhrs. If using off peak electricty alone at 2p/unit cheaper than oil to heat the water we could save =A3200 but that assumes *all* hotwater is heated by off peak electricity, with a family that isn't going to happen.