I hope someone can help me. Had an enviro mini installed yesterday (dealer recommended installer) to replace my old whitfield quest that died. Stove is in the downstairs of my 2-story, 950 sq. ft. houseboat and whitfield used to heat the entire boat. Was looking forward to a quieter stove that ran on a thermostat. Had to leave as the installer was chasing down a rattle (loose screw, I imagine), came home an hour later to a house reeking of smoke. Eyes burning, sick to my stomach, I turned the stove off and opened the windows. The vent system is the one that worked flawlessly for my 15-year-old whitfield quest: a 3-in duravent clean-out tee, a 3 foot vertical rise and a 90 out the wall to a square cap that exhausts to both the right and left, rather than down. This cap is 12 inches from the vinyl siding. I took it apart and cleaned out all the pipe and clean-out tee before the installer got there, so I don't think a clogged vent pipe is the culprit. (Every seam of that vent pipe is caulked - where the pipes join, the seams that run along the pipe - all of it.) I turned the stove on again with the damper all the way out (the installer hadn't adjusted it or used a whachacallt it to measure the vacuum and the damper was all the way closed) and a window open about 3 inches. I started the stove and sniffed around as it lit. Definite smoke leakage where the clean-out tee goes into the stove, especially at the bottom, even though I saw the installer caulk it, and could see the caulk. I went outside to see if any exhaust was making it out and the air blowing out was so much weaker than what it used to be. I could hardly feel it. Checked my neighbor's pellet vent (older lopi stove) and it wasn't much different. Came back in and thought I'd let it run for 10 mins or so. When I went downstairs to check, the fire was out and the burn pot full of pristine pellets. Probably opened the damper too far, even though the flame looked quite robust. Called the dealer. They can't get to me for 2 weeks, but will try to reschedule their techs. After the clueless installer (and I'm sparing you the loose screws I found, the door to the ash drawer hanging on one hinge and the fact that the thermostat doesn't actually turn the stove on or off, or that the installer had no idea how to adjust the output of the stove), I'm not optimistic about the tech. Today's plan: caulk the vent pipe again, everywhere, close the damper halfway and restart the stove. I'll play with the damper a bit according to Rod's directions. If that doesn't do it, I'll open a window. And, if that doesn't work, I'm out of ideas. I'll let you know what happens. Meanwhile, anyone see something I'm missing? Is that right-and-left cap the issue - too hard for the exhaust to exit? Are there any technical issues with the mini I'm unaware of? How's enviro on technical support? Thanks for any help you can give me.