Fire-rated ductworks are required to carry out the smoke exterior the making, even utilizing fan assisted systems. If a smoke extraction ductwork is wholly contained inside of a fire compartment, it must be capable of not less than resisting the expected smoke temperatures generated throughout the development of a fire. https://rylanpesft.blognody.com/41061719/a-secret-weapon-for-fire-rated-insulation-for-ductworth