Midwest Hearth Eco Fans for Wood Stoves | Heat Powered Ecofan for Your Wood or Pellet Stove Heater | Silent Fan Operation | High Efficiency | No Assembly Required (9-INCH 175-CFM, Gold) SELF POWERED - Creates its own electricity without using any household energy or batteries COMPLETELY AUTOMATIC - Starts automatically when placed on top of a stove and adjusts its speed with the stove temperature 18% FUEL SAVINGS - Tests have proven that using an Ecofan can reduce fuel usage up to 18% and a reduction in particulate and carbon emissions 38% FASTER HEAT - The airflow created by an Ecofan can help you feel the heat from your wood stove up to 38% faster TWO MODELS & 3-COLORS AVAILABLE - [8-INCH 125-CFM] or [9-INCH 175-CFM] each available in GOLD, NICKEL, or BLACK