In the '80s we started using 'air-tight' wood stoves that basically damped down the incoming air to a hot fire, so it would smolder all night long.  That produced lots of unburned elements, that also gummed up the chimney.  Once per day you should 'let it go' to burn off that residue, was the mantra.
From all this I conclude that a hot fire is a clean fire.  Most wood stoves are too big to run wide open all the time, and they'd also sublimate faster, the walls should be as thick as possible.
In the USA, I built a house with a masonry, air-tight wood stove, by simply adding airtight doors to the firebox, of a normal, 35' high chimney.  The firebox was surrounded with 30 or 40 tons of thermal mass.  That allows you to only burn the appliance at it's hottest setting, for as long as it takes to warm up the masonry, which then keeps the house warm, until the next day.  (Week in the case of the Alabama house, it was also constructed of 180 tons of blocks and concrete, inside the conditioned