Energy Ratings

Energy Ratings

We're all coming to understand our responsibility to the planet. We have to conserve our resources and do our utmost to reduce the pollutants we release into the atmosphere. It's not an easy task, but there is some good news - energy costs money, and being efficient with it means that you spend less.

There's now a standard benchmark to help you judge the energy efficiency of a great many products, from washing machines to central heating boilers. You'll have seen markings like those on the right on most household appliances you've bought recently.There is, however, one crucial difference. A well-chosen window can actually save you money as opposed to white goods which will invariably have a running cost.

Of course, the ultimate is the 'A' rating windows. It's a grail that's eluded many manufacturers, so we are obviously delighted what we can offer the absolute pinnacle of energy efficiency, ‘A’ Rated windows is the only choice.Our A-rated casement windows represent a truly remarkable progression in window performance and technology.

Understanding the Label

What is a Window Energy Rating?

A Window Energy Rating (WER) is the overall energy balance of a window taking into account the frame, the U value of the glass, the available solar heat gain, the type of spacer-bar used and air leakage. The resulting numerical value (Energy Index) is generally a negative number which is then placed into a band on an A-G scale consistent with other energy performance labels already familiar to the consumer. Window Energy Ratings were launched in early 2004 by the British Fenestration Rating Council (BFRC), an independent organisation dedicated to improving the energy efficiency of fenestration products.

What is a U-value?

The U-value of a window is a measurement of the rate of heat loss indicating how well your windows are keeping valuable heat in. It is expressed as Watts per square metre Kelvin W/m2 K. The lower the U-value the better the thermal performance of the glass.

Understanding Window Energy Labels

The BRFC Window Energy Rating is a voluntary scheme used by the glazing industry, in which the whole window (the frame and the glass) is assessed on its efficiency at retaining heat. The scheme was developed by the British Fenestration Rating Council and looks like the standard EU energy labels as seen on many other goods and products. The BFRC Window Energy Rating contains bands from A to G, where A is the most efficient and G the least.

What Does the Energy Efficient Window Ratings Label Tell You?

The BFRC Scheme is the system for rating the energy efficiency of windows Window Energy Ratings use a consumer-friendly traffic-light style A-E ratings guide similar to that used on ‘white’ goods (such as fridges, freezers, washing machines etc…). This ratings label can be used by you to make more informed choices about the energy efficiency of the windows you are looking to purchase.

With carbon emissions high on the global agenda and the current high cost of fuel, we are all looking for ways to make our homes more energy efficient.

Each window rated by the BFRC has a unique label.

This label will display the following information:

  1. Who the Label Belongs to
  2. The rating level – A, B, C, etc...
  3. The energy rating eg. +3kWh/(m².K) in this example the product will gain 3 kilowatt hours per square metre per year.
  4. The window U value eg. 1.4W/(m².K)
  5. The solar heat gain eg. g=0.45
  6. The effective heat loss due to air penetration as L eg. 0.00 W/m².K

Simply put this will determine how well a product will perform the functions of:

  • Helping you contain and conserve heat within your building in the winter
  • Keep out the wind
  • Resist condensation
  • Contribute to improved sound insulation

So what are Energy Efficient Windows – Use Solar Gain to Benefit the Home

So exactly what are Energy Efficient Windows? They are windows that help to contain and conserve heat within the home keeping out wind and rain, resisting condensation and yet allowing natural “free” energy - the warmth of the sun - to heat the home. They can be made using any frame material - aluminium, PVC-U, steel or timber or even a combination of materials.

Energy Efficient Windows are easy to recognise - simply look for the BFRC Label.