The built-in 36-inch fireplace offers 4 adjustable flame colors and delivers powerful, adjustable warmth (62degree(s)F to 82degree(s)F / 17degree(s)C to 28degree(s)C). With an output of 4,600-4,700 BTU, it effectively heats areas of 375-430 sq ft (approx. 35-40 m). Control every function from up to 26 feet away with the included remote, featuring a 0.5-9 hour timer and 20-second delay shut-off for safety and convenience.