Venting to patio

[Richard Roshak]

I beleive this is incorrect, however I could only find something about condensate in the fuel gas code. Anything else in the codes I could use?

[Markus Keller]

The fitting on the left looks to be a concentric fitting, so I will guess it is for the furnace. If that is the case, is the fitting on the right exhaust for a high efficiency water tank?
If the right fitting is for a water tank, I would write it up as dangerous and hazardous. Location of both exhausts is obviously very poor but ... assuming the left one is for a furnace, people probably won't be out there much when it is on. If the right one is for a water tank, people will be out there when it is on. Either way it's a poor and potentially hazardous installation.
Imagine someone falls asleep in that chair while everyone else is taking showers or the furnace is running. That's a lot of contamination to breath in on a calm day. The chair near the exhaust is a 'money shot'.
If they leave those, advise client to install screens on the pipe. Kids love to put stuff into pipes like that.
Normally a stone bay like that indicates a fireplace. Is there a fireplace unit located in that stone bay? If so, do the vent pipes have sufficient clearance to the heat source?
Sorry, don't know what Code NJ is under.

[David Reish]

I have a very similar photo. This is in my opinion a very poor placement decision, but could find nothing in the codes which restricted exhausting onto a patio, outisde of distance restrictions from building openings. (windows/doors)

[Eric Barker]

Since codes defer to manufacturer specs why would you try to reference code?