Mike, I really have no interest in engaging in the Gun discussion. But my experience with the BioMass has proven some solid fuel burning fundamentals to me. My first BioMass season we'll pretend didn't happen. The second, I was so excited because I thot I had found the secret to long burns, turn the fan waaay down (50-60% fan setting) to keep a smoldering, low energetic fire. I bragged extensively of how I had discovered the secret formula to extend loading to... maybe 6-8 hours. Not sure I mentioned back then how either my wife or I needed to go out and stir the coals and baby sit the boiler several times an hour due to bridging or blow holes (evidenced by wisps of smoke/smell). Started season 3 with the same approach but better seasoned wood. Mid-season discovered 80% fan kept the whole boiler/combustion area and coals hotter which required far less tending, but consequently more idling, but far less baby sitting. Season 4, 80% all season, the best seasoned wood so far, better coal bed maintenance, far less incidences of smoke/smell, and the far less baby sitting (not opening the upper door mid-burn). Finally for extended periods on cold days, read that minimal idling, I saw my gasification boiler operating when it was the happiest, least instance of hints of smoke, fewest instances of needing to open the upper door mid-burn, and longest periods of time observing just a shimmering wave of heat out the flue with a wisp of steam. Up until this year, I hated the thot of starting fires multiple times a day so didn't think storage was for me, but now I see the benefits of burning as hard and hot as possible, put the excess energy somewhere, and not think your can successfully throttle energy output of wood logs. I would bet that your idling time is similar to mine. I have a very inefficient large home in a more temperate climate. I'm certain your new construction is far more efficient in a far colder climate. On those very cold days when my boiler hardly idled, all I see is that shimmering out the stack and no scent. We are in the middle of a large tract of land so we are the only scent producer. I wish I had looked before I started this post. At this moment Nofossil has posted burn and storage plots of his system on another thread. After I post this reply I'll try to find it. You'll see from his plots, I'm working from memory, his burns each day are about 12 or less hours. This thread has many storage operators that can chime in how long their burns are. Probably more or less based on storage capacity, etc. Point is, your system like mine at the moment needs to keep some low level fire going all day long to respond to demand, no matter how infrequent, which will get far worse as shoulder season approaches. I've seen first hand how a hot, energetic coal bed minimizes basically pollution out the stack. I've read here that there are European countries or cities that operating a solid fuel boiler without storage is illegal. I see that as less of an efficiency issue and more of minimizing pollution in a densely populated area. I know if I was in a neighborhood the way my boiler has been operated over the last 4 years, I'd have lots of pissed off neighbors and I couldn't blame them. My bet is that on your very cold days, when your Gun is continuously pumping out the btus and staying hot, your neighbor probably doesn't know you have a boiler. It's on those days when it's more temperate and he's outside more, that all your neighbors know you burn wood. It's just me, but I'd go poll your other neighbors and I'll bet they've noticed the scent, it's just that they're more tolerant or less sensitive or they have less time on their hands. Sorry so long, but if the Gun blows products of combustion thru a coal bed, then you and I have very much in common regardless of all the humma humma Gun refractory, re-light blah blah that I care nothing about. Now I gotta go make money.