Flex pipe for furnace exhaust pipe?

[Todd Edly]

Never ran into this one before. Your thoughts? Can flex pipe be used on exhaust?

[Galen L. Beasley]

They do make flexible flue pipes but this one looks like what is generally used as a dryer vent. The flue pipes will have a metal collar that is factory attached at both ends and all of them I have seen are stamped with a data plate and UL listing.

[Todd Edly]

Thank you Galen,

The collars are there. I did some more digging and all is well.