Features: -Auto start: upgraded technology, faster speed and greater air volume. Thermal stove fans circulate wood/hot air produced by burning coal or pellets. Effective circulation of warm air throughout the house. -Environmental protection and power supply: The thermoelectric module acts as a small generator to power the fan motor. No batteries or power. Improved warm air circulation can increase comfort and reduce firewood consumption. - Silent and silent: The designed fan blades have greater air volume and lower noise. You won't even know about the furnace fan, but you will feel the warmth. You will enjoy the warm air in a quiet and comfortable environment. -Safety design: The furnace fan supports the use of anodized aluminum, which is high temperature resistant and will not deform or discolor even when working at high temperatures for a long time. -Long service life: There is a bimetal safety device on the bottom of the fan. If the surface temperature rises above 300°C, the safety device will gently push up the front of the fan to protect the TEG and motor. Furnace fan specifications: Number of blades: 5 Rotation speed: 1350 rpm Noise: below 25 decibels Starting temperature: around 50 Thermometer specifications: Name: Fireplace thermometer Measuring range: 0-500 Type: Thermocouple bimetal thermometer Surface diameter : 63 (mm) Usage: Magnet adsorption type Packing list: (according to your choice) 1x stove fan