Division of space. Functional TV Fireplace wall, but could be more attractive & functional. Books on wall? More furniture>user friendly. Like row of upper windows (light, but privacy). Lots of
vented fireplace? Or a mantle fitted with a ventless fire box?
other fireplaces in the project (http://www.houzz.com/projects/6118/South-End-Residence ), they're all vented units by Valor; specifically, they're gas direct-vent "portrait" style models with the "President" front:
http://www.valorfireplaces.com/products/portrait_zeroclearance.php
It's a little difficult