Some may call this revolutionary new stove a Pellet Stove or a Wood Stove, but it is in a category by itself. You get the best of both worlds with Radiant and Convection heat while still burning a renewable resource. This new patented stove is EPA 2020 approved and UL Listed for safety. The manufactured densified fuel logs that this stove burns are made of all natural sawdust particles. The stove puts out between 17,500 - 40,000 BTU's depending on the brand of log used and the damper settings. Our "large" pellet stoves produce the Greenest Heat Available Today. 509-1 Optimum is a gravity fed system that feeds pressed logs one after the other holding 3 logs at a time in the feed tube. No auger, motors, or computers, high efficiency, low emissions, innovative design. The stove burns all night, burning one pressed log vertically at a time. The 509-1 Optimum creates adjustable heat, controlled through one single opening and closing of the air valve.