Originally posted by gordy
Thanks for answering my question people. I was just curious now I know. God for bid the ductwork catches on fire. I agree if one gets out with out choking from the foams, carpets,plastics ect. in a home. Makes a fire rating on ductwork a mute point if you ask me.

Gordy

That right gordy.Its the first 5' of duct that they make a fire rating on.