When I use my Whitlock forge I make sure I have a pile of wood ready. I have a hairdryer hooked up to mine and it burns like no tomorrow. It gets my metal glowing red. I built a coal forge but it was to deep and not wide so it ruined my tips (glowing bright yellow with air burning around it) If you have free wood its the cheapest way to go. Takes a little longer, but for a hobby knife maker its fun.