Designed for efficiency, performance and to provide an economical heating source, the TPI35 pellet insert delivers comfortable heat up to 2,000 sq. Ft. Up to 30 hours of burn time, allows less refueling and minimal maintenance.EPA certified 2015 Digital control panel Painted black cast iron door included Certified for 50 50 mix of pellets and corn Painted black flashing with 2? depth adjustment for installation versatility (sold separately)BTUs: 12,750 - 38,250 Collection: Timberwolf Depth: 10-1 2 - 12-1 2 Finish: Painted Black Height: 20-13 16 Weight: 140 Width: 21-1 4