3.7. Ductwork and Lagging associated to the Kiln and Dryer.1 - Set exhaust stainless steel sheet metal.1 - Set combustion air stainless steel sheet metal.1 - Set hot air recuperation stainless steel sheet metal.1 - Set slow cooling exhaust stainless steel sheet metal..1 - Set butterfly valves.1 - Exhaust chimney.1 - Recuperation chimney.1 - Slow cooling chimney.1 - Set insulation lagging to hot ductwork as required complete with stainless steel cladding