well , a coal stove doesn't "usually" works in summer days or nights except for a very very cold night in the desert
, So from my knowledge inside a house in the winter there is a higher pressure than outside were there could be sometimes even minus 14 degrees Celsius (or 6-7 degrees Fahrenheit...) like there is where I live now , and even worse , because of the wind this temperature is felt as minus 19-20 degrees Celsius...
"Kind of cold" don't you think?
So in these conditions , even with no wind there will be a big difference between the barometric pressure from inside the house and the outside!
In these conditions, hot air from the stove will surely rise because the difference will be too big, and the wind turbine will still work and the gases will be "dragged outside by force"
I haven't tried it , but have seen it more and more on houses and it must work well, otherwise... who would sell and who would use a faulty thing by design?
By the way, some say this wind turbine was tried and tested in Romania(I don't REALLY think it was for the first time ever...)
Try opening the door while you are only in your underwear and feel for yourself how the wind "forces" really work
And when considering stack temperatures in some cases of about 150 degrees celsius OR MORE as I have seen in a topic around here(something like 400-470 degrees Fahrenheit and the owner switched back to wood from coal because I qoute "he couldn't get much heat in the house"... of course he couldn't > it was all out the chimney...), one must ask if a turbine like this is not the answer + a GOOD heat exchanger to keep most of the heat inside the house , and so to increase the efficiency of his stove!
I'll do just that : keep most of the heat inside the house and use a BIG wind turbine like the one http://www.smoky.ro/ventilator-cosuri-de-fum.html
sells on their site!
An aluminium one , 300 mm diameter wich is about 120 dollars!
Light , good corosion resistance and a big "suction draft"