NYC building and fuel gas code

Paul S_3

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

Mad Dog_2

Mostly using chimney as a pipe chase. Why not call.inspector? Mad dog