The purpose of Eurovent Certification Programs is to create a common set of criteria for rating products. Due to the detailed description of certified products, engineers do the job easier, as detailed comparison and performance qualification tests are not required. Consultants, projectors, and users can choose to trust the accuracy of the catalogue data. When a manufacturer participates in a certification program, he or she has to present a list of models or models, together with performance data. The files are evaluated by the Eurovent Certification Company and a predefined number of units are selected for testing by independent laboratories. If the results are consistent with the relevant standards, the models or model range is listed in the Online Eurovent Certification Guide. Models are regularly subjected to random testing to verify compliance with catalogue data. It guarantees that the products are subjected to independent checks and are correctly rated. This symbol ensures that projectors, mechanical contractors and end users are correctly classified by the exhibitor.