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After having obtained the highest density level IV according to DIN 24194 T2 last year, leakage tests have been taken over this year during a test demonstration with Ventosafe-products, this time in accordance with the EN 12237 norm. The tests have been conducted by and in the laboratory of the firm SP in Bor°as , Sweden, an European offcially recognized control-organism. Excellent results have been measured: not only did they obtain the highest density class D, moreover have they established that the leakage results were rather 4 times better than level D. Please find the officialy test results in Appendix. pdf