Ductwork techniques extracting great powders or chemical solvents are regarded to have a heightened fire danger. Pressurisation ductwork is definitely the ductwork utilised as Portion of a pressurisation method. Normally used in safeguarded stairways, lobbies, corridors and fire fighting shafts. Around the roof, the smoke extract ductwork terminates to the https://liftshaftventilation89901.therainblog.com/28267568/fascination-about-fire-resisting-ductwork