Home-Complete HC-7002 Heat Powered Fan for Wood Burning Stoves or Fireplaces-Quiet and Low Maintenance, Disperses Warm Air Through House, 4 Blades SAVE MONEY ON ELECTRICITY! No electricity required. Works off the HEAT produced by your fireplace or wood-burning stove. The hotter the fire, the faster the blades turn. Therefore, more warm air gets dispersed throughout your house! WHISPER-QUIET! 170-190 CFM Above 900 RPM and MAX Temperature of 644 F (340 C) The only moving part is the blade assembly. Say good-bye to the loud noise of electric forced-air fans! You wont even know this fan is there  but youll FEEL the WARMTH! MAINTENANCE-FREE! Just dust it off occasionally, and put some light oil on the blade shaft to keep it spinning smoothly and quietly! BUILT-IN FIRE-STOKING INDICATOR! Because this fan operates on HEAT, youll automatically know its time to stoke the fire when the fan slows down! The higher the heat, the faster the blades spin. So when theyre slowing down and youre not feeling the heat as much as before, it simply is telling you to stoke the fire! What could be easier? SAFETY PLACEMENT OF FAN - Fan should be placed on the back of the stove (not in front) 6 inches away from the stove pipe