Joulesave Heatkeeper Energy Saving Radiator Panels - 10 Pack Saw-tooth pattern reflective radiator panels that sit behind your radiators and are scientifically proven to save as much as 20% on your heating bills Heatkeepers' saw tooth patterns cause the warm air to spin out into the room - reducing the time it takes to heat up the room and virtually eliminating cold spots. It also reflects the radiant heat back to the radiator which means that the water circulati Heatkeeper panels are suitable for the height of the most common household radiators and the overall dimensions are 580mm high x 450mm wide x 8mm deep. It takes 2-2 panels to cover a typical radiator. Each pack contains panels instructions and sufficie Heatkeeper panels are easy to fit and in the vast majority of cases they can be fitted without the removal of radiators. Panels are fitted below the sightline and will not be visible Average expected savings approved by Ofgem under the Carbon Emissions Reduction Target (CERT) programme. These savings are attributable and are ratified by Ofgem in the CERT 2008-2011 Technical Guidance Manual.