The WRT4826 fireplace's catalytic combustion helps increase efficiency and save energy. It produces more heat using less wood and gives you longer burn times for heating buildup by 90%, thereby greatly minimizing a major cause of chimney fires. Engineered with a secondary burn and catalytic combustion for burn-off gases, the WRT4826 fireplace offers maximum energy efficiency while consuming less fuel. It's an investment that pays for itself over time. Includes Insulated outside air kit. Features Model # WRT4826WH. Brick Type White Herringbone. Fuel Type Wood. Circulating louvered design features ceramic glass for optimum heat transfer optional clean-face kit available . EPA phase II certified and Washington State approved wood heater. 3.8 cubic foot insulated firebox that accepts up to 20 log size for increased performance. White herringbone textured refractory panels with integrated ash lip and decorative cast iron log retainer. Air combustion control for variable heat output with air boost for faster wood ignition during startup. Catalytic combustor for maximum performance with bypass control. 75% thermal efficiency and heats up to 2,500 square feet*. Efficient air wash system that keeps glass clean. Cast iron door with heat resistant door handle that stays cool to the touch. Optional heat activated 200 CFM UZY-5 variable speed blower for time-delayed heat distribution. Dual ducted gravity kit required when using clean-face kit and/or thermostatically controlled forced. Air kit available 3 maximum outlets . Durable high temperature paint finish. Uses SCIL ACBI 7 air cooled wood burning chimney. Uses SCIL ASHT / HT6103 / S-2100 / HT6000 7 insulated wood burning chimney. Specifications Blower 200 CFM. Chimney Size 7 . Interior Cubic Feet 3.8. Maximum Log Size 20 . Heating Capacity up to 2,500 sq. ft. Glass Viewing Area 22.5 W x 19 H . Firebox Interior 22 W x 15 D x 20 H . Overall Dimensions 38 W x 24.5 D x 45 H .