Older thread but winters coming so here are some tips from a seasoned user. I have a central 4436, I'll be on my 12 year with it this season. I change the water every two years, add one gallon of central brand rust inhibitor, I use soften water which creates perfect ph balance an nitrates. I use ash trol daily as instructed. I burn only seasoned wood and only wood. I live in middle of 15 acres heavy woods so wood is close and free. I had the 4436 fitted with a central option that dealers don't advertise for some reason, but should, a Draft inducer fan. It will bring your stove to temp in a quarter of the time, eliminate 3/4 of you ashes and smoke. Dealers seem to not tell people about it maybe out of ignorance or cost but it's a invaluable option! In 12 heating seasons I have had ZERO breakdown cost, I have replace rope door gasket twice. Tip one...buy the central stainless chimney spark arrestor which has a cap to keep rain/snow out of firebox. Green wood moisture and rain/snow will rust you firebox out in just a few seasons and is the biggest destroyers of O.W.B.! Tip 2... cap your boiler chimney in the summer at once. Tip 3... burn seasoned wood, only wood. Tip 4...get the fan Draft inducer! Tip 5...use softened water! Tip 6...stir ashes, especially corners weekly at a minimum. Tip 7...change water and rust inhibitor every three years maximum. Tip 8...use firebox ph modifier each day, it will make your life easier by keeping creosote off walls and ceiling. Tip 9...keep ash level to 3 to 4 inches. Once they are spent the no longer conduct head but instead insulate. Tip 10...Use since heaving 75 lb. Chunks of wood in there. When they hammer the top and sides 1000 times a year it matters. Tip 11...you are now a responsible O.W.B. operator, with very little preventable maintenance and cost you will keep that 8 thousand or better investment working perfectly for 20 years! It works! Sit back and enjoy