On Buildings that were built after 2000 where gas flues are passing through plaster board ducting through rooms to vent on outside walls, gas and building regulations now require fire rated access panels in order to view the joints and the fixing of pipes. The Inspection Hatch has an internal locking device, insulated panel door and intumescent smoke and gas seals. It is easily opened by pressing the door. The door can be removed giving complete viewing for inside the ducting.
The unit has 1-2 hours fire protection according to BS476 Part 22.