I grabbed some galvanized pipe a cheap regulator valve to attach to the air line off the compressor. That gave me a way to crank the air going in to the "fire pit" to make it nice and hot for heating steel.
Easy to make and effective although it worked the compressor, not something to do with any regularity. Less than $10 dollars to make and even less time to put together.
I made the wood base just to hold it in place and it acts as a heat shield.
