The angled 14″ deep firebox makes it easy to install just about anywhere. The 3600 model can be top vented or rear vented.The Archgard 3600 DVTR24N zero clearance gas fireplace is available as a clean-face unit (pictured here) or with a choice of louvers. Color choices for the louvers include black, a combination of nickel and black or gold and black. If you prefer a cleaner look (no louvers) you can add the Black Arch front or the Sunburst front. The 3600 includes a variable speed thermostatic fan. You also have a choice of heat reflecting ceramic fiber brick in Quebec City Gray or Quebec City Red.Or you can choose reflective glass panels. The 3600 ranges from 17,000 to 24,000 BTUs. Framing Dimensions: 33 1/4″h x 36 1/2″ w x 16 1/2″ D.