I looked it up, and most of the huge industrial ovens are gas and electric. I think what you mean is out right open flames like a house oven gas or prop. I think the ovens for powder coating must have channels for the flames to flow up so the flames dont go inside the ovens. But I will have to do more research before I spend 5 or 6k getting the powder coating system I want. I want to be able to do large stuff as well as small. I was also thinking blasterr could just use his moms oven if its electric, and just buy a cookie sheet to place his items on. That way he saves cash on buying that toaster oven. On the other hand that toaster oven I know for a fact makes killer garlic bread, and pizza.