Testing AOV Systems
In order to be efficient, AOV systems must undergo a series of rigorous tests which adhere to BS EN 12101-2:2003.
BS EN 12101-2003 tests typically include cycle testing over many thousands of operations and also testing in a high and low temperature range with no more than a 10% reduction in opening area. The unit will be required to function under snow and wind loads, whilst opening to fire position using both mains and battery power in under 60 seconds.
Any manufacturer that has carried out these tests must provide a Certificate of Conformity supplied by a UKAS accredited body. This details the loadings and temperature ranges the AOV has been subjected to during testing and should be accompanied by a Declaration of Performance.
Critical safety product
All of these tests mean that in the event of a fire the AOV system can be relied upon to perform its function and evacuate smoke from the building.
Although it may be possible to connect other types of ventilation rooflights to alarm systems to act as an AOV, this is not permitted under Construction Products Regulations.
Any system that is covered by a harmonised standard, such as BS EN 12101, has to be CE marked and therefore has to have undergone testing in accordance with the standard. Non CE marked units will not have undergone any testing and are likely to fail in the conditions they will be subjected to during a fire, potentially causing serious injury or death.
