The definition of the three elements of the performance criteria of dampers tested to BS EN 1366-2(1999) are integrity, insulation and leakage.
Integrity (E)
After the start of the fire test, leakage through the fire damper shall not exceed 360 m3/h/m2 (corrected at 20 degrees). The integrity around the perimeter shall continue to maintain its separating function during the test without either
- Causing ignition of a cotton pad
- Permitting a penetration of a gap gauge, resulting in sustained flaming
Insulation (I)
This is the time in completed minutes for which the fire damper continues to maintain its separating function during the test without developing temperatures on its unexposed surface for which either
- Increases the average temperature above the initial temperature by more than 140C or
- Increases at any location (including the roving thermal couple) above the initial average temperature by more than 180C
Leakage (S)
- Leakage through a fire barrier shall not exceed 200m3/h/m2 (corrected at 20c). The requirement for leakage during the test need not be met after 5 mins of test duration.
- Note: the result of the fire test shall be stated in terms of time elapsed to the complete minute from the commencement of the test to the failure of the damper by E.I or S whichever is the shortest
