I'd like to install a pellet stove but I'm not sure if I can vent it into my existing chimney. Here is my setup. I have a chimney that is brick with what I consider clay piping as the liner. It was built in 1988 so its not old construction. There are 2 clean outs so I assume there are two clay tubes in it. The oil furnace looks to vent into one side and our wood stove upstairs vents into the other. In the basement there is another vent available which is where I want to vent the pellet stove. Can I simply vent the pellet stove into this outlet on the chimney or will I have issues upstairs? I believe there was a wood stove hooked up in this location before but I can't confirm. My thoughts are that if the wood stove can vent efficiently then the pellet stove would be fine but I'm no expert. Any advice is appreciated.