Test Criteria by Product Groups The Seal of Approval has been created by the Institut für Baubiologie Rosenheim GmbH in order to make it easier for consumers to find their way through the variety of products. The Seal of Approval helps you to protect yourself against health hazards caused by your living environment. This way, the Seal of Approval reassures consumers and manufacturers alike and, as a clear distinctive feature, provides the latter with a competitive edge over other manufactures who sell products that might be harmful to health. Meanwhile, test criteria, which were applied by taking scientific aspects and implementation criteria into account, have been defined for nearly all product groups. This, by the way, is also true for the prefab houses industry where the Institut für Baubiologie was charged with testing wall structures and other building components.