I have a Hot blast 1500. Until I purchased A manometer and set my Barometric damper I had many problems burning Anthricite coal.
I couldnt get enough air into the furnace and couldnt close the ash door until I could see what was going on.
Now I have it set and can burn with the ash door closed and the spinner turned out about 10 turns. (I leghened the bolt)
The good news is I didnt need to drill any additionall holes in the door as some have had to.
Still early yet but looks good so far.