Ok never had or been around a pellet cooker before. First off I installed this hopper onto the bottom of my old smoke vault the propane burner has failed several times causing much soot inside and not a clean burn so for the time being until I build something else or find a nice old fridge this will do. The hopper seems to perform as advertised gets up to temp quickly and in comparison to the 3 thermometers I installed is accurate. I'm still a little confused about the smoke setting but I am going to contact Dennis tomorrow with that question. My question here is do some pellets ash more than others? There seems to be ash everywhere and all over everything on the inside. Tonight just to get some more burn time I used it to reheat so leftovers in a pan covered with foil and there was noticeable ash on top. So is this from the brand of pellet? Or I am wondering if possibly I need a larger exhaust? Another question I will ask Dennis is how much vent I need.