Nice stove
I can repeat the above. I learned dry wood is very,very important if you want to burn on the low settings.
I found my best burn to be around 2 to 2.25 on the stat, but then split sizes changes it some. (small I can go lower,, larger higher)
If it gets to warm in the house with full load, I've learned to put in 1/2 loads, so I can burn with the stat on 2.
If I'm home during the day & it's warm in the house, rake the coals up front, one or 2 splits lasts several hours.
I get different burns with spruce, than birch.
I just learned how important following the steps in the book are, it takes some time to get a full loads to burn properly on the lower settings.
Get it hot before closing the bypass, leave it on 3 for 15 - 30 min, close bypass, leave on 3 for 15 min +/-, step down by .5s -- 5 - 10 min each
step till you get to the low settings. You have to have a good bed of hot coals & the process helps dry the wood out as you get to the lower settings.
Weather conditions effect it too, wind cause mine to burn hotter by increasing the draft so I set lower when the wind blows.
But if you want heat, crank it to 3 & take off some clothes. We had to open some windows to cool it off with the first few fires, I just got the house too warm.
Burn for a while, read the book again & adjust for your conditions. I don't get good burns below 1.75, & I'm learning how important dry wood is.
I just read this yesterday, "the cat temp probe is 4 to 8 min behind time, it indicates what happened in the stove 8 minutes ago" (pg 39 of the "online" manual)
Try 2 for a night burn,, if the house gets too warm, try 1.75. & step down in small increments. Again the wood is 1 real important factor, got to be dry to burn on low.
Have fun learning your stove & various burns, takes a while. Enjoy the long burn times.