Hello, My first post here. Nice place Ok to my questions, I have a Buderus Logana add on boiler. It is rated to burn wood or coal. The boiler DOES NOT have shaker grates. The manual says that you are supposed to use a riddling tool (which I dont have and Buderus doesnt sell anymore). Everytime I try to burn coal, I fail miserably. At the end of the day the coal never fully ignites and goes out leaving almost full size clunkers. I use a 1/2" tubular shaped tool with a 90* bend on it to riddle. The boiler has holes at the bottom of the coal bed which to insert the tool. I run the tool horizontally on the grates until I see red coals start to drop. 1. Is it feasible to burn coal in this boiler with out shaker grates. 2. Possible low draft problem? 3. Open secondary draft (located above coal bed on the door) more? 4. Different ridding tool? 5. Is the poor burn a result of not shaking (which I cant) or ridding wrong?? Thanks for any suggestions.