Energy efficient Windows


Secure, stylish and second to none, discover our System 10 products.


Summit Windows System 10 products are energy efficient. They are proven to help keep warmth inside your home whilst keeping the cold out and any heat loss to a minimum – all this will help reduce your heating costs significantly. The cost saving made from reduced fuel bills outweigh the investment cost over the life expectancy of the window.




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Window Energy Ratings


Government Building Regulations require us to use energy efficient glass products that help to reduce CO2 emissions and protect the environment. These regulations have recently been updated to include a Window Energy Rating scheme which assess the overall energy efficiency of a window and offers a further means of compliance.

Part L of the Building Regulations for England and Wales (and Part F in Northern Ireland) includes Window Energy Ratings (WERs) as an alternative method of compliance.

The minimum level for replacement domestic windows is band E. For windows in new domestic extensions, the minimum requirement is band D. Additionally, in new dwellings, BFRC Ratings are now being used to guide building professionals towards more energy efficient design and building components.



Summit Windows do not employ high pressure salesmen and will provide you with a free no hassle estimate. Once you have received your estimate it will be left to you to make your own decision in your own time.