Hazlemere Windows define the energy efficient window ratings label

All of our customers know how concerned we are about the environment. That’s why our range of Window Energy Rated (WER) systems offers all of our customers a greener option when buying replacement windows.

As most of you know, Hazlemere were extremely proud to be the first company in the UK to design, manufacture, supply and install a dualframe aluminum green window system that achieved an ‘A’ Window Energy Rating in 2007.

We continue to promote energy efficiency during 2009 and ensure that homeowners can have cost effective, environmentally friendly windows. All of our windows are rated by The British Fenestration Rating Council (BFRC), so we wanted to explain how the ratings work for your home or business.

Hazlemere Windows A Rated Aluminium BFRC Window Energy Rated LabelThe British Fenestration Rating Council (BFRC) Scheme is the UK’s national system for rating the energy efficiency of windows and is recognised within the Building Regulations as a method to show compliance for your replacement windows installation.

WER’s use a consumer-friendly traffic-light style A-E ratings guide similar to that used on ‘white’ goods, such as fridges, freezers and washing machines. These ratings labels will help you make more informed choices about the energy efficiency of the windows you are looking to install.

With carbon emissions high on the global agenda, we are constantly looking for effective ways to make our homes more energy efficient. Each window rated by the BFRC has a unique label, and this label will display the following information:

• The rating level — A, B, C, etc.
• The energy rating e.g. -3kWh/(m²-K) in this example the product will lose 3-kilowatt hours per square metre per year.
• The window U value e.g. 1.4W/(m²-K)
• The effective heat loss due to air penetration as L. e.g. 0.01 W/(m²-K)
• The solar heat gain e.g. g=0.43

To make this even simpler, this rating will determine how well our products will function. For example, helping you maintain heat during the colder months, and keep the cold out. Prevent condensation and improve overall sound insulation.

Energy Efficient Windows are easy to recognise, so always look for the BFRC Label. See our Energy Rated Windows for further information.


Our showrooms are our shop windows and we have invested heavily to create extensive displays that best showcase our large range of windows, doors and living spaces. You will receive a warm welcome, plus a proper coffee, and the choice to browse at your leisure without interruption.


Want to speak with an Advisor? Give us a call on 08000 825 825

Our friendly team will be pleased to help with any questions you may have.

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