Hello,
I am new to the site and relatively new to blacksmithing, I have only ever used a propane forge and I have recently acquired a forge made from a small propane tank. At first I thought it would be propane fueled but upon closer inspection I have developed some doubts. The forge is situated on its side and a door has been installed in what would normally be considered the top. What threw me is that this forge has a large vent positioned near the back and on top (relative to the forges current position) about 4in tall and wide enough for my fist to fit through. I am not sure if this is a coal forge or if it is some form of gas forge, any help or directional advice would be appreciated.