Opening - 12" H x 36" W; Framing - 41 5/8" H x 42 1/2" W x 11 1/2" D; Barrier, On/Off Remote (Millivolt Models), Thermostat Variable Remote (IP Models), Battery Relocation Kit (IP Models), Crushed Glass may be installed with or without the log set. Uses about 2 sq. ft., flue pipe sold separately and does vary per house (HomeFires team will be in touch regarding specifics for each project)