PVC pipes exiting masonry chimney

Specific Inspection Topics Inspecting HVAC Systems
#1

HI everyone,

I am currently a student, and I was wondering if someone could give me some advice on this condition I encountered.

Is there any situation where it is appropriate for plastic pipes to be exiting a lined chimney? This picture was taken from the road for part of an assignment, so I was not able to go inside this house.

Thanks for your help,

Whitney

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#2

Yes, there is.

https://forum.nachi.org/t/furnace-and-water-heater-vent/194810/6

2 Likes
#3

as long as the only thing using that flue is the hi efficiency furnace that is utilizing the pipes You are looking at.

4 Likes
#4

Yes. As long as the masonry chimney was only being used as a chase for the high efficiency furnace/boiler.

3 Likes
#5

Thanks, everyone. Also, because there is no rain cap, isn’t there an issue with rain entering the chase? And perhaps rodents?

#6

A piece of hardware cloth is recommended when near an area where rodents could get in. This application above the roofline is one I wouldn’t worry about.