The installation must comply with specifications and testing must have been carried out in accordance with EN 1634 in order to guarantee the fire resisting properties of the door. In addition, national and international guidelines, standards, approvals and other relevant regulations concerning smoke control and fire resistance must be taken into consideration.
Insulation against heat transfer is ensured as soon as the intumescent material is activated.
Concealed, hydraulic door closers must not be installed on fire resistant doors without appropriate protective measures, since:
during installation, a large area of the door must be cut out, which reduces fire resistance.
many models contain flammable hydraulic oil.
they are made of a highly thermally conductive material.
aluminium housings may melt in intense heat and break.
it takes almost the entire door thickness.