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What is VOB?

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What does U-value mean?

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What's relative humidity?

Air is usually only part of its highest moisture content. The relative humidity is the percentage of the existing amount of moisture in relation to the maximum possible amount.





ISOGON has DIN EN ISO 9001 certified quality management system


Our windows carry the
CE-mark which indicates the conformity of the product
to the European guidelines.


ISOGON is one of the winners of this year's Great Place to Work® competition "Best Employers 2019 in Berlin and Brandenburg".









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