Key Benefits: 【Automatic Operation】No battery or electricity is required for this stove fan, you just need to place the wood stove fan on a flat, smooth surface and then the heat powered stove fan will start to rotate as the fireplace warms up. Highly effective at distributing heat throughout the entire house nicely. It will stopped working automatically as the stove cools down. 【High Safety Performance】The base of the stove fan is fitted with a bimetallic safety device. When the fireplace surface temperature exceeds around 300 ° C, the safety device gently lifts the front end of the fan to reduce the contact surface between the fan and the wood stove to protect the stove fan. 【Energy Conservation & Environmental Protection】The heat powered stove fan is designed to circulate the warm air created by a wood /coal or pellet stove. The heat powered stove fan can make full use of the heat from your wood stove and quickly disperse warm air into your room. The room will heat up faster. It continues to circulate hot air to keep the room warm all the time. 【Whisper Quiet】The heat powered stove fan features a unique and ingenious blade design that minimizes the noise of rotating blades.The noise level of our stove fans is even less than 25 dbs. Even at top speed, there is hardly a whisper, so the wood stove fan can completely provide you with a warm and quiet comfortable environment. 【High Quality】The fireplace fan is made of anodized aluminum. The surface of our stove fan is fine and neat. High performance power generation module and motor. The hotter the base of the fan is, the faster the fan rotates. The stove fan will slow down and stop while the stove is cooling down. Operating temperature: 185℉-650℉ (85℃ -345℃) 【24-Hours Customer Service】 If you are interested in our heat powered stove fan or have any questions, please feel free to contact us, we will reply within 24 hours and do our best to solve your doubts. We believe you will be satisfied with our sincere service attitude and excellent professional ability. Specification: Number of blades: 4 blades Weight: 857g Noise Level: ≤ 25dB Material: aluminum Optimum temperature: 482 °F (250 °C) Attention： 1. Keep fan away from small children when in use. 2. Good stove safety practice includes the use of a stove thermometer. 3. To move or carry the fan, always use the extendable handle while wearing gloves. 4. Never handle the base of the stove fan, do not set the stove fan down on an unprotected surface when hot.