50" x 38" Opening, Radiant Heat, Outside Air Standard, Dual gas Knockouts, Steel Grate, Safety Firescreen, UL Listed, Outside air kit standard, Requires 14" Dura-Vent DuraChimney II, Must order Attic Insulation Shield (14DCA-IS), Roof Radiation Shields (14DCA-RRS), Chase Top Collar (14DCA-CTC), Refractory Panels required at purchase, flue pipe sold separately and does vary per house (HomeFires team will be in touch regarding specifics for each project)