Through this kind of fire, the temperature inside the duct can be up to 800°C and outside of. This massive temperature increase calls for superior-conclusion, specialised insulation options to protect the men and women inside these buildings. ROCKWOOL fire rated duct products may also help minimise the chance this poses, https://fireresistantductworthisn02344.thenerdsblog.com/42386270/fire-resistant-ductworth-isntallers-things-to-know-before-you-buy