Whether they are glass, manual or automatic, Manusa fire-proof doors have the same function. When the electrical power supply is cut as a result of a fire, alarm, etc, the door remains closed but it is not locked. The leaves close to prevent the flames, gases and high temperatures from spreading from one sector to another, but they are not immobilised. In this way, moving from the affected zone to a safe zone is not prevented, should this be necessary.
The choice of a glass or metal fire-door depends on the environment where it is to be installed, although it is more common to install metal fire doors in the industrial sector.