Windows
The government has set itself a specific target of ensuring all new homes built after 2016 are zero carbon in addition to the general requirement of an overall carbon emission reduction in line with the Kyoto agreement. To achieve this, houses will need to be far more thermally efficient than they are currently.
To highlight this topic and enable a system which can be understood by all, BFRC (British Fenestration Rating Council) energy rated products have been introduced. BFRC WER (Window Energy Rating) is a system specifically for windows and follows the same principle for white goods and other energy schemes.
Based on a rating of A-G (A being the best), windows are rated by taking into account not only the ‘U’ value of the window but also the positive solar gain by the use of specialist glass and the air leakage of the window. This combination ensures a more realistic approach to rating than considering just the ‘U’ value.
Duraflex has carried out a major investigation into various options with over 300 simulations carried out. A number of A, B and C configurations have beenregistered, all of which are considered energy saving and therefore recommended.
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