I bought a P68 late last heating season and I'm still trying to get optimal burn set on it. Harman's manual is very vauge on how the controls work and my dealer or should I say ex-dealer is dumber than a cord of wood with about as much hot air. I live in sw lower michigan so winters are cold. I have a <10yr old house w/ 1300 sq/ on main floor with same in basement. The stove is in the basement. I am currently experimenting with the stove temp setting b/c on room temp the distribution blower will slow or shut off and I hate to not get the heat out of what I'm burning even though the rate of feed is adjusted automatically in a short amount of time. Like I said I'm not convinced this is the setting I want but I wanted to try it. The manual states on stove temp mode that distribution blower will not run at a setting of 5 or less since the stove output would be below 80% this doesn't hold true with my experience and puts the rest of the manual in doubt as to how correctit is. I want a manual from the guy that designed/builds it not the from the secretary or salesman. I have read other posts that have very good info in them and would love to get some feedback. To me and my $ pinching, wood/coal burning buddy the rate of air blowing through the unit seems to be too much which would be blowing more of my heat out the vent. Our other quandry is the relation of the feed rate control and the room/stove temp control. They seem to be redundant controls since a change in either of them will result in a change of amount of air feed and the length of auger feed. I currently have the feed rate set at 4 and adjust the stove temp dial based on how cold it is. Stove temp is set about 4 on average. I am currently averaging two bags a day this winter to heat the house to about 68-70 (bigger flux due to trying stove temp vs. room temp) with no propane use. Does this fit with others use? Sorry so long but I want to understand and would love to have the actual control diagram to see what causes what to turn on and off since I'm a electrician. Anyways I'll leave it at this and see what you have to say and go from there any input greatly appreciated.