The British Standard 9999:2008 Code of Practice for Fire Safety in the Design, Management and Use of Buildings gives recommendations and guidance on the design, management and use of buildings to achieve acceptable levels of fire safety for all people in and around buildings. Under the topic of routine inspection and maintenance of air conditioning ductwork, the BS 9999 states: “Maintenance of air conditioning and ventilating equipment, including air filters, motors, fire dampers and their controls, smoke detectors and alarms, is of paramount importance both in preventing fire and in ensuring that measures taken to mitigate consequences are effective when needed.”
The Health Technical Memorandum HTM 03-01: Specialised Ventilation for Healthcare Premises, “Recommends annual fire damper testing.”