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The Energy Savings Calculator provides estimated potential savings resulting from the replacement of older windows with more energy efficient windows.
Calculations are made by collecting a few details about your property, the type of windows you have and the main heating system within your property. To view the calculator, click the button below.
If you would like to add the Energy Calculator to your website, please fill in the form below to make your request.
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Listers / Lister Windows are trading names of Listers Central Ltd, and GJB Developments Ltd, subsidiaries of GJB Holdings Ltd, registered office 21 – 23 Totman Crescent, Brook Road Industrial Estate, Rayleigh, Essex, SS6 7UY | Company number 02613952.
