i have a mark3 in my basement,when i first got it i ran the draft at 2-2 1/2 turns open,seemed like it was sending heat up the flue.
i have a magnetic thermometer on the stove pipe about 10-12 inches above the elbow on the back of the stove. i try to keep this between 200-275 degrees depending on the outside temp,i now run my draft between 1-1 1/2 turns open,depending on temps and find my house is alot warmer than last year running the draft more open. i have a baro installed,heating a 2100 sq ft house including the basement.
temps here in central maine was in the high 30's yesterday and i run the draft at alittle under 1 turn my house was 78 all day,last night i backed my draft knob out to 1 1/4 with temps in the low 20's my house was 75 this morning,its been 14 hrs since i filled it too.
i never run my blower anymore,seems with my setup anyways,the blower was keeping my cellar warmer,shut it off and more heat comes upstairs,my stove sits kitty corner in the southwest part of the house with the cellar stairs about 8 feet away comming down just off to the side of the stove so i get most of my heat up the stairs.i have a vent in the living room and middle bedroom and hallway(ranch home). i have a vent in the entry way on the south end of the house which serves as my cold air return and pushes the heat upstairs. we did have some 10-15 below zero mornings and i did run it @ 1 3/4 turn open and kept my house 72-73 with stack temp around 300.
that seems,in my setup anyways is the cutoff point...if i get to 300 or over,most heat goes up the chimney but each setup is different depending on chimney hight,how the air moves in your house and so many other things. you just gotta try different things and make a note of all the variables.
there are alot of helpful and knowlegable people on this site that will be very helpful,we all seem to like to experiment and fiddle with things and build and work on stuff. read some of the other post's on here like i did and you will pick up a wealth of info.