What is the maximum operating temperature for Loc-Line duct?

The Hakko Loc-Line® duct is an Acetal product that has a typical maximum temperature of 80°C/180°F. The material has a typical melting point of 160°C/320°F. This duct should not be used where the air that is being ingested by the system is above the maximum operating temperature. Doing so will cause damage to the duct.