FIREPROOF® fire protection ventilation ducts L90

FIREPROOF® fire protection ventilation ducts L90

Ventilation ducts of fire resistance class L 90 according to DIN 4102-6: 1977-09 made of calcium silicate boards "PROMATEC-LS" corresponding Current No. 2.4 Building Regulations List A Part 3 - Edition 2015/2 Construction product for the installation of ventilation ducts, which have to meet fire resistance requirements.

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