Well, after three weeks of trial and error with my new stove, I'm getting the hang of it. First and foremost, DAILY cleaning and maintenance are essential. My system consists of 17' of vertical 4" Pellet Vent Pro with a 4" clean out "T" and an outside air kit consisting of 4" flexible ducting (15'). I finally have been able to get about 24 hours out of a 40# bag of pellets. The stove's settings are room temp mode/pellet feed of 2.75/temp of 68 degrees with a setback of 57 degrees overnight. (Honeywell thermostat) I am heating my office which is about 700 SF and very poorly insulated. One of my concerns was that this would be too big of a stove for this space but I couldn't be happier with my choice. The office heats up quickly and feels very cozy. Here are my two questions. First, is there a chance I get too much combustion draft? I have adjusted the low draft adjustment pot as low as it will go and I still seem to burn a very hot fire. (tested with Magnehelic myself) Has anyone ever put a adjustable damper on the combustion air intake? Fantech does have a "Iris" damper which is adjustable. (will not fully close though) Second question, is the accumulation at the front of my burn pot ash or clinkers? I'll try to describe it as thoroughly as possible. The accumulation happens when the stove calls for heat after a long maintenance burn and has to raise the temperature more than just a few degrees. The accumulation looks like ash, but it is very very slightly stuck together. I can very very easily crush and scrape it. It is fluffy. I'm assuming this is ash, but would this be categorized as "clinkers"? Thanks for bearing with my ramblings!