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Jul 22, 2022 
The working principle of a wood stove fan set is to use a device to generate electricity, which provides power for the motor to drive the fan blades. The heat from the wood stove is conducted through the lower part of the wood stove fan, and the temperature difference compared to the upper part produces a current.
The wood stove fan set is powered by heat.
The wood stove fan set does not have a dedicated power source (no power cord or plug), so it is self-sufficient and relies on the electricity generated by the motor to drive the fan blades.
Therefore, the wood stove fan set uses a device to generate its own electricity.
Devices can generate voltage through the temperature difference between two objects.
When the wood stove fan set is placed on the stove and a fire is started on the stove, the stove absorbs heat and transfers the heat to the lower part of the stove fan through conduction when the fan is placed on the surface of the stove.
That's why stove fan manufacturers often recommend placing the fan on a smooth and level surface to promote maximum heat distribution from the stove to the fan.
Heat travels up the fan to the location of the device, which is approximately halfway up a typical stove fan. When the device transfers heat from the bottom (hotter) part of the fan to the top (cooler) part, a current is produced due to the temperature difference.
Therefore, you will see wires extending from this device on the stove fan.
Thus, heat conducted from a wood-burning stove through the bottom of the stove fan generates a current because it is transferred through the device to the top of the fan, where the generated electricity powers the motor to drive the fan blades.
Wood stove fan sets typically operate within a certain temperature range, and the hotter the stove runs, the more air the fan typically distributes.
For example, our stove fan is designed to operate within the 175-650 F (80-345 C) temperature range.
The fan will not turn on until the stove reaches a certain temperature.
If the stove is running too hot, the fan may be damaged. Our fan has a built-in safety device (just a piece of metal) on the bottom, so when the temperature gets too hot, the fan will lift slightly off the stove and cool down.
To help prevent the stove from overheating due to excessive burning, it is always helpful to use a stove thermometer to closely monitor the temperature levels.
