The Endurance by Fahrenheit Technologies is the most efficient biomass furnace on the market. Why? Because we've engineered the Endurance to produce more usable heat. Simply put, you get more heat from wood pellets, wheat pellets, corn, cherry pits or other biomass fuel. Endurance is easy to use and maintain. You can heat with shelled corn, wood pellets, or other biomass fuels, investing your heating dollars in renewable fuels that are locally grown. Installed as a stand-alone furnace or add-on furnace, Endurance combines the environmental benefits of biomass fuel, with the convenience of self-cleaning, low-maintenance operation. The result is a high-performance heating unit that's easy to use, cost-effective, and satisfying to own. Endurance now features Autostart automatic ignition and FuelMizer™ fuel saver. Plus, Endurance is UL 319 tested as an approved Supplementary or Central Furnace.