Cleaned My Harman Mark III

WOW!! I fianally got around to cleaning my Mark III after three years of ownership and about 20 ton of coal. All I can say is I think I will be doing it annually from now on. I took out about a five gallon pail of coal dust out of the baffles. I just wasn't getting the heat transfer that I use to. Now I know why I wasn't. After cleaning the stove and firing it back up I'm running the stove at a much lower draft setting and getting alot more heat through the fan. So if anyone who own one of the Mark series stove is wondering if they should clean it out, do so, it will make a differance. And mind you I was getting plenty of draft before and my baro is set and operating perfectly. That is why I didn't think I had any issues with the stove.
Tom

Yeh?!!

Just follow the SPRING CLEANING or SPRING MAINTENANCE Threads. They should be cleaned good at "LEAST" once per season if not more depending on your burning habits.

Yes that fly ash on the top of the baffle does inhibit the heat transfer to the air tubes that the fan blows through. I gave mine a mid-winter cleaning Friday and noticed improved heat. It had not yet affected the draft in my set up, only the heat transfer. As WNY mentioned a good spring cleaning after shutting down for the season is normal. For the mid-winter I vacuum out the ash on the baffle after about 6-8 weeks of steady burning. I will probably do it once more around the beginning of March and then do the spring cleaning around the end of April.

I just reached up there with a scrap of wood and scraped the ash down of the baffle. I'll deal with the "snow drifts" at the end of the year.