Hi Fellers (and ladies). I have in my grubby little hands a PE Alderlea T5, to replace a propane builder grade fireplace in a framed (fully interior) chase. (see photo, please excuse mess... kids..) Chase is 6' x 2' up to vaulted ceiling. We were originally going to demo the chase and install a brick veneer backer and hearth, but the ceiling drywall repair would be... challenging. Having observed some photos, the idea of an alcove install that would maintain much of the framed chase begins to appeal. But... I'd prefer not to be open for the full 84" from hearth surface to top of alcove as required in install manual. My question is can that be lowered (either entirely, or just on the face (leaving a cavity behind) if done completely with non-combustible materials (steel studs, cement board, brick veneer) The manual for my T5 does allow for reduced clearance per NFPA 211. Attached is photo of current install and page from t5 manual. Thanks in advance!