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Researchers from the Fraunhofer WKI and the Thünen Institute of Wood Research have compared emissions from individual building materials with emissions from wall structures and with concentrations of volatile organic compounds in the indoor air of model houses. The result: Even under controlled conditions, emission measurements of individual materials rarely allow statements to be made concerning complete systems such as wall structures, let alone real residential buildings. In principle, however, system tests on entire components in large test chambers are suitable for approximating reality and describing the interactions between the emissions from the materials, thereby taking into account the structure of the construction. The examination of model systems does not, however, make it possible to provide precise information regarding emissions in real living situations, even in the foreseeable future, as the overall situation is significantly influenced by, for example, people and the weather.more info