Providing details of the thermal performance of Windows and Doors
Consumer Information
For the homeowner
Homeowner information
The Thermal rating Register provides a simple system to demonstrate the energy efficiency of varying window designs.
Using a simple colour coded A-G rating, similar to that seen on white goods and houses; generally the higher the rating, the better the overall thermal efficiency, and the greater the savings on your fuel bills.
The Building regulations as amended in 2010 require replacement windows to be a minimum of a ‘C’ rating.
The rating of windows not only takes into account the amount of heat the window loses directly, but also the amount of air that can escape through the frame, and the positive benefit of heat energy gained from solar energy.
The Thermal Rating Register provides details of PVC-u, timber and metal windows. For details of local installers click the link on the right – Find a rated window installer.