Smoke ventilation according to EN 12101-2 - D+H Mechatronic

2.1.5. Testing the resistance to heatIn the resistance to heat test, the NSHEV is mounted on a test furnace that is heated from room temperature to300°C within 5 minutes. After this heating-up phase during which optional thermal actuators are deactivated toprevent premature actuation, the NSHEV is actuated and must be driven to the fully open smoke vent positionwithin 60 seconds. The NSHEV must remain in position for a further 25 minutes.The test is passed if the aerodynamic free area has been reduced by a maximum of 10% after the entire periodunder load of 30 minutes. If the area has been reduced to a greater extent, the test is not passed, as not enoughsmoke can be vented from the building in an emergency.2.1.6. Testing the aerodynamic free opening areaVarious measurements are performed on the NSHEV where NSHEVs in the facade are used to extract smoke fromthe building. In particular, the static pressure and the atmospheric pressure are measured at different pressureratios (Pa) at different NSHEV opening angles.The coefficient of discharge Cv or Cv0 required by EN 12101-2 is then determined by means of a formula thattakes into account the measurement results for the flow and pressure as well as the geometric area of theNSHEV. The aerodynamic free opening area A acan then be calculated for the NSHEV.Section A21