Quiet : Quiet , dissipates heat in , reduces noise , increases temperature and improves hot air circulation , resulting in higher comfort and reduces wood consumption in the oven More stable and Chimney Fan : The 6-propeller fan provides a larger air capacity and rotates the of warm air around your home , but does not deliver hot air directly : The fan base and propellers are anodised aluminium , which is wear-resistant and has good thermal conductivity Overheating Protection : overheating for protection , the built-in bi-metal strip at the bottom of the oven is designed to slightly raise the edge of the fan while protecting the motor and electrical module : Without battery or main power supply , the electric module can be used as a small generator to power the fan motor, Manufacturer: Watreketal