code requirement of pvc duct
code requirement of pvc duct
(OP)
Can anyone help me with the code (united mechanical code and international code) limitation on the use of PVC duct? The PVC duct is used to supply conditioned air (not exhaut) and it is to be routed inside of the return plenum. The plenum is sprinkler protected.





RE: code requirement of pvc duct
RE: code requirement of pvc duct
A. General requirements - Non-combustible materials, Class 1 (25 flame spread, 50 smoke developed), conforming to NFPA 90A, NFPA 90B, NFPA 91 and UL 181.
RE: code requirement of pvc duct
Please advise if anything above not accurate.
RE: code requirement of pvc duct
Harvel makes a CPVC that meets the 25/50 requirement of the IMC, (http://www.harvel.com/). But 603.7.4 of the 2000 IMC does say that "Plastic duct and fittings shall be utilized in underground installations only," so I believe that you need to look at other materials.
What is your application that you would need to use PVC for supply air?
---KenRad