I am building a house and needed some advice and guidance on how I should approach this installation. I recently purchased a Jotul 550 and in reading the documentation, I am able to install it in a prefab fireplace meeting certain requirements. That is all well and good, however, I have no idea which prefab to get. I want a safe one, but at the same time, I don't need anything spectacular since I am just going to stick the Jotul in it. Any advice on make, model size, etc. that would give me what I need would be greatly appreciated. I have a call into the installer, but I have not been able to get a return call and thought I'd get a head start here.