The pvc up the side of the house? That's the radon reduction system. As far as I know it gets drilled through the foundation floor and has a fan that sucks gases from underneath the foundation and releases it up at the roof .
I have asked a local stove shop that does installs and they didn't think there was a problem with single wall through the wall as long as it's stainless and obviously far enough from combustibles.
I have asked a local stove shop that does installs and they didn't think there was a problem with single wall through the wall as long as it's stainless and obviously far enough from combustibles.