Draft proofing windows is a great way to save money on heating costs as well as lowering your carbon footprint. Draught proofing windows can save a UK household approximately £25 to £65 per year, depending on the source and the scale of the project and over 100Kg . The Energy Saving Trust estimates average savings of around £45 per year for draught-proofing windows and doors. Performing this on all windows, doors, and other sources of draught, like an open chimney, could lead to a larger overall saving for the home.