Sometimes there’s a big difference between the two, and sometimes there’s not. Inspections alone are evaluations of the fireplace/chimney structure (if its masonry built), fireplace/chimney installation (if its prefab manufactured) and the overall condition of either...
You are cleaning out the fireplace after a long winter of burning fires in your fireplace. You see that the mortar is loose or cracked and the back wall of the fireplace looks deteriorated. The firebox, where you build your fires, is the part of your chimney system...