Originally Posted by sirdoofus

As requested, here is a pic of 2 different charcoal making burners of different sizes.

Super easy to make!

The bigger one is made from two 55 gallon drums and a heating duct and the smaller one is made from a 5 gallon paint can, a standard paint can (not really necessary) and....well, another piece of heating duct.

total time to construct both about 3 hours

Total cost was about $35 US - most of that because I couldn't find free 55 gallon drums.