MB-86EI system makes up open windows with fireproofing class EI30 according to EN 13501-2+A1. Structure is based on MB-86 with high level of thermal and acoustic insulation and water/air proofing.

MB-86EI combines the advantages of the classical windows with fireproof properties. It's construction complies with all legal requirements, especially those for energy efficiency and environmental protection whils simultaneously providing fire protection. Classifed as fireproof.