Too the wood heating builders on the fence, i am wishing i had the green burn type wood burner 30 years ago, so much cleaner burning, even with my 50 percent moisture wood mixed with 30 percent moisture wood, this type burner is cleaner by far. first pic is chimney before opening the the secondary burn chamber too see the flame shooting down in the bottom burn chamber. The flame pic is the bottom flame blowing down and hitting my flame ramp too help keep my bottom secondary burn chamber door seal areas cool enough too hold up too the red high temp silicone that holds the rope seal fit in place. I had too shut the top chimney off with insulation too keep dirty smoke from bypassing my attemped shut off trap door. now all i need is too put some sort of shut off on the 2 1/4" pipe air inlets, so when the fans shut off, the fire wont be feeding the hopper with air too create more dirty smoke at the shut down times.
second pic is my chimney before i blocked the inlet air from the fans at shut dow and the last pic is after i put bags over the fans too block inlet air at shut down too keep chimney clean at shut down.
This type unit will be nearly no smoke at all one i fix the auto air closeing at shut down. P.S. My chimney temp stays below 185 f at max, so that is better than most units available. with a smaller heat exchanger the chimney heat waisted wood be more like the most units around 300 exit temps.