Heat Powered Fireplace Fans, 4-Blade Heat Powered Log Burner & Stove Fan, Black Product Features: No Electricity Required: Utilizes the fireplace's heat source for power. The hotter the fire, the faster the fan blades rotate, rapidly distributing heat to every corner of the room! Ultra-Quiet: Say goodbye to the noisy electric fan! Maintenance-Free: Simply add a little oil to the bearings periodically for lubrication and smooth fan rotation! Over-Temperature Protection: When the temperature reaches 350°C, a metal spring at the bottom will lift the fan to protect the motor from damage! Product Specifications: Air Volume: 160-210 cfm Speed: 1200 rpm Number of Blades: 4 Noise: 25dB Operating Temperature: 70-350°C Material: Anodized Aluminum Dimensions: 140*105*203mm Net Weight: 0.58 kg Certifications: CE & RoHS & BSCI 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.