energy saving
energy saving windows

Energy Efficient Windows and Doors

Our Windows and doors are available with a wide range of glass options, including glass from renowned manufacturers Pilkingtons and Saint Gobain, which can increase the energy efficiency of your windows. About 20% of heat is lost through poorly insulated window frames and single glazed windows, which not only is a burden on your heating costs but also on our planet, an issue which we take very seriously.


When you choose windows from The Definitive Collection you can select a product with high energy efficiency, benefiting you not only from an energy saving cost point of view but also by helping to protect and preserve our environment.

Having energy efficient windows installed can help you make significant savings on your energy bills.

On the 1st October 2010, changes to L1B of the Building Regulations will come into force which state that all replacement windows must have a minimum Window Energy Rating (WER) of band c or a declared U value of 1.6 W/m2k.


Energy Ratings for Energy Efficient Windows?

The British Fenestration Ratings Council Ltd (BFRC) is an independent organisation dedicated to improving the efficiency of fenestration products.


What are Energy Ratings?

Energy Performance Certificate BFRC Energy Ratings are a method of informing customers of the relative energy efficiency of specific windows. The windows are rated on an A to G scale, which is consistent with other products such as light bulbs and white goods.


How are they calculated?

Ratings are determined by a formula that takes into account the following various factors that each have an effect on the overall energy performance of the window and how energy efficient windows are:


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Carrying the Green Issue Further

Kömmerling is carrying the green issue even further as it continually strives to offer products of an exceptional quality whilst at the same time honoring its responsibility as a market leader to protect our environment.