Berlin, Thanks for posting... I've burned wood for years, I would always wait until it was good and cold out because if I didn't the house would be 90+. It was an old stove and the flue gas temp was always 300 to 400 F I would never smell any smoke in the house unless I was lighting a fire.
This Mark I is a bit different. I been using it because it's new to me and I'm trying to sort it out. Its been warm out and raining so the flu gas lingers outside and leaks back in house. I let my coal fire go out and I'm going to wait until its colder out. The one good thing is, coal fumes stink.
So If I can smell it inside something is wrong.
I had a stoker stove for about a month and personally I think they may be the worst thing combined with a power vent at ground level. That combustion fan must keep the concentrations of pollutants at high levels always mixing the fly ash. The smell is 100 times as strong as anything that has come out of my Mark I.
I hope once it gets cold out I'll like my stove....http://www.smfrancis.demon.co.uk/airwolvs/24expos2.html
(edit do so long post of link...)