My wife thinks I'm nuts because I'm always looking at our chimney during burns, especially start ups. Just monitoring smoke, where it typically blows, and how long it lasts. Reading threads like this reinforce why I like to stay conscious of it. Again, all it takes is one jerk, and in my case I went rogue and installed with no permit...so I could do without any official complaints. Luckily the prevailing wind is outta the west, and it's probably 150+ yards between my chimney and any houses to the east of me. More importantly, my chimney doesnt smoke besides start up.