We recently bought a lake house that had a fireplace. When we got our new roof we noticed it was never vented out so we tore the wall out to see what was there and how to vent it and we found all these on the top instead of just one place for a pipe like ours at home. Does anyone know what they all are for and how to vent it out?
![Help. What are these for? Help. What are these for?](https://www.hearth.com/talk/data/attachments/295/295769-61840fea25a2fc4aa57bd4538f86c8a2.jpg)
![Help. What are these for? Help. What are these for?](https://www.hearth.com/talk/data/attachments/295/295769-61840fea25a2fc4aa57bd4538f86c8a2.jpg)