The Self-Powered 4-Blade Wood Stove Fan from Hastings Home works off the heat produced by your fireplace to turn the blades ; the hotter the fire, the faster the blades turn. This super quiet heat powered fan efficiently moves the hot air coming off your wood burning stove around the entire room so you will feel warm all the time. This compact fan is only 9-inches tall and sits on top of your wood burner with a 4-inch clearance from the stove pipe and is virtually maintenance free!Details:Black9" x 6.9" x 5.2"Self-powered fan uses the heat from a wood burner to propel the four blades and circulate airThe fan spins faster as the temperature increases and it will slow down as it decreasesSuper quiet operation with no electricity, batteries, or the volume of forced air fansPosition the fan on top of your log, wood, or pellet fireplace with a 4-inch clearance from your stove pipeUse on freestanding wood burners with a maximum surface temperature of 644-degrees FFan base will cool along with the stove once the fuel has burnedVirtually maintenance free, just oil the shaft and dust the blades as needed