It sucks!
Storage of coal
It Works Real Well!
There are quite a few Coal Vac threads on the forum showing different adaptations of a shop vac(s) and some pvc pipe to move coal to the stove hopper.
My flavor has a 2" pvc pipe in the bottom of the bin that runs ~10' to a 12 gallon barrel above the hopper that catches the coal as it drops from the air stream created by the shop vac.
No dust. I use a drywall dust bag in the shop vac, Qtown has a water filter set up on his that I am going to experiment with on my next upgrade.
Here is the thread with the video posted a few years ago.
Coal Vac Operation Video
Here is the thread with the video posted a few years ago.
Coal Vac Operation Video