Window Energy Ratings (WERs): What should I be looking for?
In maintaining an energy-efficient home, keeping your windows properly insulated has to be a priority. The facts speak for themselves in this regard as poorly fitted single glazed windows could lose you 10% of your home’s heat, while this number shoots up to 50% in older properties.
With this information, it pays to be aware of how efficient your windows are at keeping your house insulated. Recent research has shown that a high percentage of homeowners assume that all double glazing is equally energy efficient, but this is a myth. The best way of making sure you know the difference in your window’s glass quality is to familiarise yourself with the Window Energy Ratings (WERs).
The science of the scheme
The scheme was introduced in March 2004 by the British Fenestration Ratings Council (BFRC), an independent body tasked by the government with creating a universal measuring system for window energy ratings. It’s exact mathematics comes from creating a formula which considers solar heat gain (window g-value) and thermal losses (window u-value and air leakage).
Although it may sound complicated, the simple fact you need to know is that this number stacks up as a grade, A-G. The higher the grade, the more energy-efficient the window. Recent building regulations now mean that all windows now must have a ‘C’ WER rating, which gives you an indicator of the quality of window you should be using. Making it easier for you, the rating also takes into account the entire window as a whole, including the frame material, design and glass type.
Ignorance is no excuse, always check the label which should accompany the window and don’t be afraid to ask your supplier.
WERs are now also covered by the Energy Efficiency Commitment (EEC) which encourages gas and electricity companies to make energy-savings in households through subsidised home improvements. This growing recognition of the measuring system can only help to make it more widely understood by customers.
Green Deal and double glazing
Double glazing is included as part of the Green Deal and is one of the most popular aspects of the scheme. Without the upfront costs, the improved efficiency of your windows will help you save money in the long term and create a cosier environment for your home or business.
Constant replacing of windows can be a costly and time-consuming task, which means it should be done right the first time by using those which are energy-efficient. The WER rating’s simplicity really is its greatest feature and provides a handy tool to make your window choice the right one.
Chris Nokes is a writer for Nolan uPVC Ltd, an energy-efficient double glazing company celebrating its twentieth anniversary.
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