Double wentylator for heat-powered fireplaces!!! 8 blades!!! Powered by heat from your fireplace!!! Product - opening packaging - not used Get more heat from your fireplace/goat Without batteries and electricity , converts heat from a fireplace or stove into electricity necessary for its functioning With 8 blades and double motor wentylator fireplace for wood stove, it can evenly distribute warm air throughout the room, providing warmth No installation required , just place the wentylator of the wood stove on the smooth and even surface of the fireplace/goat plate , near the side or back of the oven pipe. Quiet!!! The easy-to-place vane blower can drive more warm air with quiet operation. No noise . You will enjoy the warm air in a calm and comfortable environment. The applicable temperature range is 60C 350C . Do not exceed 350 degrees The base of the fan blade is made of anodized aluminum, which is resistant to rust, wear and good thermal conductivity. How to work without batteries and electricity？ Wentylator does not require batteries or electricity, it generates its own energy thanks to the heat from the surface of the furnace. The fan base transfers heat to the TEG units, and the TEG units convert heat energy into energy that drives the wentylator to spin and distribute warm air horizontally. This wentylator starts to rotate when the temperature is around 60C/131F and works efficiently when the temperature reaches around 250C/482F. The optimum operating temperature is 80-250 degrees Celsius Do not touch the working fan with your bare hands - it heats up like a fireplace and you can get burned!! Outlet products - like new ones included to see if they work.