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energy ratings
What are Window Energy Rating (WER) ?
Consumers are increasingly focusing on the energy efficiency of building products to reduce the amount of carbon emissions. To respond to the challenge of raised expectations, the window industry must provide energy efficiency information that is easily understood and can be used to compare fenestration products.
The simple U value does not fulfill these requirements because it only focuses on the heat loss from the window and takes no account of the solar heat gain that windows are responsible for and how they can improve the overall energy efficiency of the house.
In the past, selecting energy efficient windows has been difficult due to the lack of independent and validated information. There is a need for a method that is both easy to understand and independent. The British Fenestration Rating Council (BFRC), in conjunction with the UK glazing industry and European partners has designed a window rating system to meet this need for simple and accurate information. This provides third party certification for the total thermal performance of windows using a ‘fair, accurate and credible’ assessment scheme.
