WERS Commercial is designed to provide the industry with custom ratings for the commercial market. It allows commercial products to be rated for their custom performance.  

A Custom Rating provides an exact rating for a product, based on its exact materials and specifications for frame, glazing and other components. Weather tightness is based on reported air infiltration data obtained according to the AS 2047 performance test. A Custom Rating is the better option for manufacturers who wish to distinguish their product from others and who wish to maintain seamless continuity between research & development and the rating process.