Features & Details No Assembly Required: This fireplace fan has an overall size of 7.1''L x 4.2''W x 7.7''H and requires no assembly. It doesn't need electricity either. Maximum Operating Temp.: 653℉ / 345℃, Optimal Operating Temp. Range: 482-608℉ / 250-320℃. Note: Keep the generator unit away from the heat source to protect the lifespan of the generator unit and motor. Higher Efficiency: This fireplace fan evenly distributes heat to all corners of the room, quickly enhancing the overall comfort. At the same time, its low-temperature startup reduces wood consumption effectively, minimizes energy waste, and lowers household energy expenses. Ultra-Quiet Operation: Operating at less than 25 decibels, this fireplace fan quietly and effectively circulates warm air throughout the room, significantly improving the user experience and comfort. The quiet operation also ensures a comfortable night's sleep. High-Strength Material: Constructed from aluminum-magnesium alloy, the fireplace fan is corrosion-resistant, heat-resistant, and highly impact-resistant. It can withstand high temperatures and will not deform, rust, or fade even during extended operation at high temperatures. Thoughtful Details: This fireplace fan operates simple. It starts running when the temperature reaches 176 ℉ (80 ℃). The base is equipped with a dual-metal safety device that gently lifts the front of the fan to protect the TEG and motor when the surface temperature exceeds 653 ℉ (345 ℃).