The Heatmaster SS G-Series is the very latest in outdoor wood burner technology. It uses a process called wood gasification to achieve much higher efficiency than a traditional outdoor wood boiler and at the same time create far less carbon emissions, or smoke. Featuring a one of a kind flue cleaning system, this unit requires no brushing or scraping creosote. Just rotate the lever on the side of the unit back and forth to clean the heat exchange tubes. The Heatmaster SS G-Series meets and exceeds EPA Phase 2 emission requirements and currently is the most efficient outdoor wood stove on the market. Click here for more information.