I know you've covered this topic before but I'm looking for potential solutions to sparks/embers coming from my vertical vent pipe. I live in a crowded neighborhood just north of Boston and every year since I've had my stove (7 years) I get at least one doorbell from a "concerned" neighbor about the "sparks" coming from my vent. Initially I had a direct horizontal vent until after the first doorbell about three weeks after the install of my stove. I then switched to a 90-degree elbow with about a 3-foot vertical rise and then another 90-degree elbow and another 1-foot of horizontal before the termination cap. I had this for the last 6 years and still had embers occasionally with at least one visitor a year. Well last year my neighbor two doors down decided to call the fire department. So I had a visit from two engines just afterbmy daughter went down for a non-existent problem. My stove at the time was on low so imagine the confusion of the fireman when he demanded to come in only to find a barely existant flame! They were kind enough to clean my vent pipe though So this year I switched the vent pipe to go directly vertical up 4-feet past my roofline on my two-story home figuring that would solve the problem. It didn't. Just tonight another "concerned" neighbor rang the doorbell to tell me that I had sparks coming from my chimney. I know in rural or unpopulated areas the sparks aren't a concern but I need to find a solution to this in my populated area. I went to the local nursery today to buy a couple of bags of different brands of pellets to see if that might help. Any other suggestions? Spark arrestors? Etc? Thanks...