The variety of quality labels and classifications dealing with emission into indoor air require many similar tests to be done if a company wants to apply for more than one these. If we want to reduce the necessary number of tests and thus the costs then it is essential that these voluntary labels consider to adapt the international standards and try to harmonise. There are many different approaches in the respective testing protocols but also some common tracks. At the present stage it is already possible to combine testing requirements of some labels to a certain degree.
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