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NYC building and fuel gas code

Paul S_3
Paul S_3 Member Posts: 1,261
I’m installing a Lochnivar khn water boiler. The plan here is to run the exhaust and intake piping to the roof about 30 feet high . The piping will be ran on a outside wall between 2 wood studs. We will be using a combination of Duravent Ridgid and flexible polypropylene piping. Duravent states a 0” clearance for vertical installations up to 230F. The customer is weary about this installation passing inspection. What have you guys used to run the polypropylene piping to roof? Thanks Paul S
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