Oh yeah, when I was a kid in one house we lived in, there was a huge, asbestos-covered monstrosity of a coal furnace down cellar. It ran a hot-water system rather than steam, but you still had to “bleed” the radiators once in a while to get the air out of the pipes.
The thing had to be stoked with fresh coal about twice a day. Also each night, there was a big lever to shake the grate so the ashes dropped down into a bin at the bottom. Once a week, had to shovel out the ashes into a big can and haul it out to roadside for the trash guy to pick up.
We would get clinkers once in a while, and if they would not break up when shaking the grate, In a day or so we would have to let the fire go out, cool off, break up the damned things with an iron rod, and haul out all the ashes (not the usual meaning of “getting your ashes hauled”).
Then, of course, had to start a wood fire, let it cool down to red-hot coals, and put in a small amount of coal, until that got started, then a little, more, etc. If you put in too much coal, the fire would be smothered, and had to start all over again. That caused some swearing to ensue. At the beginning, the stove pipe damper had to be opended fully, then gradually closed down part way to conserve heat.
Also, had to keep running down to add more coal until the thing was burning at a good rate.
Lots of fun, makes one appreciate the current era.