I've never heard this before, but I'm trying to eliminate everything to get to the problem. I've got my wood stove in the living room which is at the end of my house so sometimes I have to do some serious air moving. I have an OAK on my stove. Problem is, I can put a stick of incense at my bedroom door near the floor (which is about mid way in the house) and the smoke pulls towards the stove room fairly strong. I can feel a small draft. No fans are running. I move the incense about shoulder height and it goes the opposite way, towards the bedroom. I put the incense around the stove and the smoke goes straight up so the OAK is working and not causing a draft. My strange question is, Can the heat from the wood stove pull cooler air towards it just from the heat? Can it cause air to circulate just by temp differences? I dont think so, but just trying to eliminate everything. I've walked all around this house with that incense trying to find a place around doors, windows etc that would cause the draft to no avail.