I have been burning coal for about 2 straight weeks and I love it (first year burning coal). The high temps. outside have been 45-50 and the lows around 38-40 in NE Ohio. I have a Brunco hand fired fireplace insert. I have been burning a mixture of about 70% nut and 30% pea anthracite.
I have been getting dead spots or ash build up (if those terms are interchangeable) in the center of the very front of the coal bed, about 4 inches in length, 1 inch in depth. I fill the coal in the front up to the bottom of the glass. The rest of the coal bed is to the top of the firebrick. These dead spots come after a good 10-12 hrs. of burn time. Is this normal? When the temps get colder and the draft increases will the dead spots come sooner or will they disappear? Thanks!