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A density test has been conducted on our products. The parameters that were measured during these tests met the required specifications. These were conducted in accordance with the DIN standard DIN V 24194 T2, edition 11.85. A density test has been conducted. The duct was exposed to a pressure of 400 Pa, 1000 Pa and 1500 Pa by means of a pulsating fan. The leak flows that were measured fully met the specifications of the DIN standard V 24194 T2 class IV, similar with the EN standard 12237 class C. Check out the entire certificate (pdf) Check out the drawing of the set-up (pdf)