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A superior technology designed to minimise energy loss through your windows

Benefits of Thermoflex Warm Edge Spacer and Energy efficient windows for Specifiers, Architects and Builders
Manufacture superior glazing units with Thermoflex warm edge spacer
Thermoflex Warm Edge Spacer for Window Installers and Fabricators
Homeowners can reduce heating bills with Thermoflex energy saving windows

Building Regulations and Window Energy Ratings

Window Energy Ratings (WERs)

Rainbow style Window Energy Rating

Window Energy Ratings (WERs) are used within the window industry and have a rainbow style label like the image to the left. High quality ‘A’ rated windows theoretically lose no energy through the window, and some installers offer this as standard. ‘A+’ and ‘A*’ ratings are also now available. 


There are several competent persons bodies that endorse WER labels, the one to the left has been endorsed by the British Fenestration Rating Council (BFRC). 

Building Regulations & WERs Page 2 of 3

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