Insulation: Time all through which the duct is subjected to fire until eventually a loss of fabric insulation steadiness occurs. Smoke leakage (S): The duct shall not have a leakage exceeding 5 m³/h for each one m² of inner surface area spot. This shall be connected with the area spot https://caswellgroup67788.bloginder.com/37304689/what-does-ductworth-installation-mean