How does a stove fan work?

When the stove fan is placed on a working wood heater (pellet or gas heater), the heat is conducted from the surface of the heater, travelling up from the aluminum base of the fan, to the underside of the Peltier device. The Peltier device generates electricity by having one side hot and the other side cooler (known as a ‘thermal difference’). This temperature difference creates a ‘potential difference’ (a voltage) in the circuit. This voltage powers the motor, which in turn drives the fan. Our models of Stove Fans can operate from temperatures as low as 60°C.



how does a stove fan work, wood stove fan, wood burning stove fan


Due to the fact that hot air rises; most of the heat from your stove simply escapes directly above and is lost. That means you aren’t actually feeling the full benefit of your heater. By placing the Cocoon Fan an on your heater, heat from and around your heater is pushed outwards around the room. With the additional power of convection, you are no longer relying just on the radiated heat – you’ll benefit from a warmer living area, fewer hot spots and potentially lower fuel bills.


The Cocoon Fan does two things; firstly it keeps itself at the optimum operating temperature, and secondly it drives the warm air into the room, creating improved airflow. Our fans are not designed to blast air in the same way a cooling fan would, but instead generates a constant and gentle airflow around the room. You will not feel gusts of air coming from the fan, but instead you’ll notice a more comfortable, even temperature throughout your living space.


So, although at first it might seem like magic, Cocoon Fans actually work based on the simple principle that if two dissimilar metals are placed together and heated, they will create a small voltage that can be enough to power a motor. It’s for this reason that the Cocoon Fan needs no power except the heater itself - No switches, no trailing wires, and no batteries. 

The fan generates its own electricity to power the little electric motor in the fan (Peltier), circulating the warm air efficiently.