The European requirements regarding the smoke-resistance of doors have recently been changed. Since spring 2019, the European standard EN 1634-3 was updated. According to this standard, the smoke-proof capacity of the doors is tested separately. As a result the rules for smoke-resistance will be more specific. The new test classifies smoke-permeation according to the Sa and S200 values.
For Sa, the smoke-permeability is tested at a room temperature of 20 °C. The so-called cold smoke resistance. The Sa requirement is applicable in case of partitions in a protected or extra protected escape routes.
For S200, the smoke permeability is tested at a high temperature of 200 °C. This test for heat smoke resistance - the S200 requirement - will apply to partitions between a protected or extra protected escape route and a sub-fire compartment.
The smoke that is released in case of a fire transports a lot of heat which may cause respiratory problems. The smoke also creates reduced visibility and contains aggressive components. The Metaflex smoke-proof door seals the rooms and prevents that the smoke can escape from the burning room and has an EN1634-3 certificate, so that you can rely on this door in all situations.