The Harman P61A Pellet Stove relies on state-of-the-art technology to automatically adjust itself to your desired room temperature. Simply pour your pellets into the convenient top-loading hopper and set the temperature dial on your P61. If the room is much cooler than the set temperature, the P61 will produce a large fire in order to quickly reach the desired temperature. If only a slight increase is needed, the P61 will burn a small fire. This way, no energy is wasted by overshooting your predetermined temperature level. Heats up to 2000+ SQ FT. BTU range of 8000 to 61,000 BTUs. Hopper size of 72 Lbs.