Energy Ratings

The WEP rating is provided for a standard window to represent typical window sizes. This enables a comparison between different products. Each WEP rating label is specific to a unique window frame and glazing assembly from a single manufacturer. This WEP label is non-transferable and both the window assembly name  (1)  and the manufacturer  (2)  will appear on the WEP Certificate.  The WEP Certificate Energy Index (3)  combines the following characteristics.