Automatic Closing Fire Assemblies
AKA
Fire Doors
What is a Fire Door?
A fire door is a door with a fire-resistance rating (sometimes referred to as a fire protection rating for closures) used as part of a passive fire protection system to reduce the spread of fire and smoke between separate compartments of a structure and to enable safe egress from a building or structure or ship - (Source:Wikipedia)
How often do they need to be tested according to Reg 4 requirements?
Yearly