How is energy saved by fitting WER windows?

When you compare different values within the BFRC window energy rating scheme, the closer to A rating the better the energy saving i.e. A rated is more efficient than a G rated window.

Similarly, if an A-G rated window were compared to a single glazed window with a worse air leakage rate and poorer energy performance of its components, a significant amount of heat would be saved through the energy efficient replacement windows.

With less energy being lost, the householder would not require to heat the building as much and therefore save fuel, benefiting from the associated reduced heating costs, while at the same time contributing to reduced carbon emissions.

What is Window Energy Rating (WER)?

Why are standard size windows used and not actual size for my house?

Is WER just for the UK?

What are the benefits for consumers?

What are the benfits for suppliers?

What are the benefits for specifiers?

Who are the BFRC?