Just got done Fabricating this today, Its for my dads fireplace … All it needs is a fan attached to the opening at the bottom with some pipeing.  We hooked a blowdrier up to it and made a fire… It works real good it was circulating alot of hot air … i almost burned my hand … I was thinking about fabricating a bunch of them and selling them on ebay … I think I could probly get about $500 a peice for them