Radiator Insulation
If a radiators is positioned against an outside wall it can lose up to 25% of its heat to the wall behind it. This can be reduced by fitting a foil-faced expanded polystyrene lining behind the radiator which can reduce the loss by 50%.
This is easiest to do when installing new radiators or if removeing them to decorate. However the foil-faced expanded polystyrene lining can be applied satisfactorily without removing the radiator.
