Oct 11, 2009 #3 DrRTU Mechanical Sep 2, 2006 318 NFPA 54 is correct and IMC contains venting too. In case you do not have a handy copy, H&C has a B vent application guide (if its the correct type). http://www.hartandcooley.com/vent/.../Gas vent, chimney sizing & application guide.pdf can give you the answer. You did not state the application - high temp, low temp, natural draft, forced draft ect.. This is a basic mechanical design stuff, make sure you know what you are doing. A screw up on venting is very dangerous. Upvote 0 Downvote
NFPA 54 is correct and IMC contains venting too. In case you do not have a handy copy, H&C has a B vent application guide (if its the correct type). http://www.hartandcooley.com/vent/.../Gas vent, chimney sizing & application guide.pdf can give you the answer. You did not state the application - high temp, low temp, natural draft, forced draft ect.. This is a basic mechanical design stuff, make sure you know what you are doing. A screw up on venting is very dangerous.
