7381 Unserviced loose appliances (1) Appliances which do not require to provided with building service 7382 Fire stopping systems (36) Fire stopping of penetrations and gaps in fire rated elements of a building 7383 Fire & smoke curtains (0) Relates to the supply and installation of fire and smoke curtain systems; includes; fire curtains, smoke curtains, and associated components and accessories necessary to complete the systems 7385 Fire and smoke natural ventilation systems (0) Fire, smoke and exhaust, natural (not forced) ventilation systems of opening doors, windows, hatches and panels etc. Includes local sensor activated actuators or central sensor activated actuators. As required; control panels, local fusible links etc or electronic sensors, connection to fire/smoke detection system, opening actuators, battery systems etc to complete the system. Systems may be capable of also providing general building ventilation.