Dang Carlo, you have to be the voice of reason and spoil my cheap adventure. I've researched it more and you are so correct. The cheapest explosion proof fan I've found is around $550. So, I have some friends in industry and I'm going to look for one wholesale or discounted. I am not going to be detoured by a fan. If I can't spray in the winter, I'm screwed anyway. It's still cheaper than a pre-fab booth costing over $2K. So, off we go in search of a fan..............