Pleasant Hearth 35,000 BTU Medium Pellet Stove Heating an area up to 1750 square feet 35000 BTU, 40-pound hopper, burn time: 12-24 hours Epa certified with an 85-percent efficiency rating Auto Light Ignition, 5 Heat Settings, 'exclusive' Comfort Control System; option to Run Continuously on MIN or MAX Includes an outside air kit and convection blower, little assembly required, kindly refer the user manual given below for troubleshooting steps.