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I need 2" ducts in this room I'm building. Flexible ducts and conduit are about the same price. I have high heat requirements. Can I use conduit for ductwork? What are the pros / cons?

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  • There are a lot of different types of metal & plastic conduit with different capabilities. Is there a specific type you were considering? How high is "high heat"?
    – manassehkatz-Moving 2 Codidact
    Dec 9, 2018 at 2:58
  • The conduit is polyurethane rated for 200F. The duct is aluminum. High heat is >=100C.
    – Walrus the Cat
    Dec 9, 2018 at 3:19
  • I think you've just answered your own question. 100C = 212F > 200F. That won't work. Or rather, it might work but no guarantees and therefore NOT RECOMMENDED.
    – manassehkatz-Moving 2 Codidact
    Dec 9, 2018 at 3:25
  • any implications or problems for using conduits for ducts generally? also we're just safeguarding air here not live wires ;-)
    – Walrus the Cat
    Dec 9, 2018 at 3:31
  • Not that I know of. Logically, conduits for ducts should be fine whereas ducts for conduits is absolutely not (unless rated for such a purpose). But others may have more to add.
    – manassehkatz-Moving 2 Codidact
    Dec 9, 2018 at 3:37

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