 Re: Chimney Framing
One thing to think about is the structure that will carry the weight of the flue liner. I would recommend a vent with solid walls (brick?) that will transfer that weight down to the oven hearth. You don't want to go to the hassle for framing something with metal studs to carry the weight -- I don't think.
In terms of framing it in -- which is a great idea; I like hiding the mechanics of the chimney -- you should be fine with insulation, metal studs and Hardibacker. Try downloading the Casa installation guide. It has content on codes for masonry chimneys.
How much of a setback were you thinking between the chimney and the frame?
James |