Heinen was the very first, in 1973, to design a steel door that was to offer fire resistance in addition to heavy-duty use. This first provided the basis for ongoing innovation in the field of mechanical protection. Since then, scores of other performance features have been added to the door: a burglary resistance door, a bullet-proof door, a blast-proof door, an acoustic door, an anti-panic door, etc.
Deleted: The steel doors from Heinen have always remained faithful to their primary objective: to provide protection while guaranteeing stability and robustness that enable heavy-duty use of the door. The ‘Quality’ requirements imposed on the production workshops go well beyond the statutory obligations. As a result, Heinen doors ensure an optimal performance level for decades.