The pellet stove doesn't build up much of any soot. Ash for sure. But not much of that is in the vent pipe. I pulled the vent pipe down before winter and cleaned it. I'm at a loss. Left it running today.
I do think I'll add a fresh air intake. Seems like it would just make the stove more efficient.
The detector upstairs didn't go off. I was surprised. Wife keeps a ceiling fan on and I'm wondering if it was pushing the smoke away. The detector down stairs was disconnected at some point. That one's on me and has been rectified.