Window Energy Rating Calculator

To assist VEKA Fabricators and Network VEKA Assure Scheme Members with calculating window U-values and energy ratings, VEKA has developed the Window Energy Ratings Calculator, which is simple to use and provides instant information about the rating of a specific combination of profile, glazing and spacer bars.

The Calculator allows the analysis of an enormous number of VEKA window and glazing combinations and provides an indicative energy rating. The results from the Calculator can be used as a U-value certificate for either replacement or new build windows and can be used to identify appropriate glazing units for A, B and C rated window, for which VEKA can provide full simulation reports.

The Calculator also allows the U-value of residential doors, French doors and patio doors to be calculated and provides a certificate as evidence of compliance with the regulations.

For further information about WER’s visit our WER information page.

The WER Calculators have been created for VEKA fabricators and Network VEKA Assure scheme members.  VEKA fabricators and Network VEKA Assure scheme members can order a Calculator by filling in the form below or by contacting VEKA’s Technical Department.

Please Note: The results from the Calculator contain insufficient content for BFRC certification and cannot be used as evidence of an energy rated window.