NFPA 2001 – Standard on Clean Agent Fire Extinguishing Systems, requires that a minimum concentration of 85% of the adjusted minimum design concentration be held at the highest level of combustibles for a minimum period of 10 minutes. This is usually long enough to prevent re-ignition for most deep-seated fires and should provide adequate time for the emergency services to attend and prevent the fire taking hold. It is a requirement of British Standards BS EN15004 that any enclosure protected by a gaseous fire suppression system should have a room integrity test when it is commissioned and annually thereafter.
It should also be retested if any works are carried out to the building envelope, this can include works such as the installation of a new door or seals and/or new cables, pipe work or ductwork. We use the latest testing technology to provide thorough assessments of potential areas of air leakage and advice and recommendations on sealing as well full retention and remedial sealing reports.