What is an 'A' Rated Window

Background – The WER  ( window energy rated ) scheme came into being October 2010 – this was meant to give clarity to consumers to choose windows using the familiar rainbow energy efficiency label

Windows can pass the FENSA test by either using a window that has been already certified on the WER scheme ( this is the vast majority of windows )  OR the window can be calculated using U vales – a window must have a U value of 1.6 or less ( remember lower is best )

The minimum compliance for a new window from October 2010 is a “C” rated window – although the majority of firms offer an “A” rated as well.

To see the difference between A and C rated windows you can go to the GGF website and click on the carbon calculator . The difference by the way is not very much.

If you go to our website you can see the make up of a typical “A” or “C” rated windows – but each window manufacturer is slightly different