The Definitive Collection is also 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.

 

 

bsi-ratings-A bsi-ratings-C

 

 

 

NOW AVAILABLE WITH
A or C ENERGY RATINGS

 

 

Click Here for more info on
Window Energy Rating (WER)

 

 

 

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