Key Benefits: 1. Thermoelectricity Working Principle Thermoelectric fan is a very clever device, as well as what it does with regard to distributing the heat around your home it is also self-powered, the heat powered fan has a small motor inside with two semiconductors, the bottom of the pellet stove fan gets hot from the stove and the top of the stove fans is cooler, the differential between the two drives the motor which in turn rotates the blades of the fireplace fans heat operated. 2. Overheating Protect Device Do you worry about the stove fan will be destroyed by high temperature when using it Now, please don’t worry, we have designed an overheating protect device which could protect the stove fan. There is a Bi-metallic safety device at the base of the stove fan. When the surface temperature rises around 300℃, the safety device gently elevates the front of the fan to protect the stove fan, by which it ensures the stove fan a longer lifetime. 3. Performance The wood stove fans non electric heat powered is made of anodized aluminum which will not rust and corrode in hightemperature and has a higher thermal conductivity efficiency than those steel ones. Operates automatically between 176 - 662°F with self-regulating speed. 4. Low noise Upgrade wood fireplace fan heat powered blades are newly proofread which ensure low noise (<25 DB) when operation, never disturb even if you are sleeping or reading, giving you a peaceful atmosphere. 5. No Running Cost Cocoon Fan In times of energy shortage, no batteries or external power required is a great advantage of this fireplace fan non electric which means you don't need extra power. Specification: Blade number: 4 Dimension: 12×8×21.5cm (L/W/H) Weight: 699g Noise: ≤25dB Working temperature: 176-653°F(80°C-345°C) Material: Aluminum Color: Black Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.