This standard BS EN 12097:2006 Ventilation for buildings. Requirements for ductwork components to facilitate maintenance of ductwork systems is classified in these ICS categories:
91.140.30 Ventilation and air-conditioning systems
This European standard specifies requirements for dimension, shape and location for access panels for cleaning and service in ductwork systems, which conform to EN 1505, EN 1506 and EN 13180. National regulations shall always be followed, even when they deviate from requirements given in this standard.