NEWS ARTICLE ARCHIVESThermally Improved Vantage Aluminium Windows and DoorsThermally Improved Vantage Aluminium Windows and Doors The Vantage range of aluminium windows and doors has been rated using the Window Energy Rating System (WERS) and classed as having a thermally improved aluminium frame. A thermally improved aluminium frame is defined as one with a U Value of 8 W/m.K or less.
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