Thanks for all the words of wisdom. I have found a set of plans to use thanks to the link to your page Wayne! My friend is an airflow specialist for HVAC. He is helping with the blower set up to get an even heat, I showed him the burner Wayne has on his page we are going with the same basic design. Forge size is (od) 10w x 10h x 24l finished should be 6x6x24 aprox.