ECOLOGICAL: powered by heat, no fuel consumption, no battery or electricity required. QUIET WORKING: Very quiet at work, the sound is less than 25 dB. FULLY AUTOMATIC WORKING: Automatic start , self-regulating speed and stopping. WORKING TEMPERATURE: 55℃~345℃.. SIMPLE AND ELEGANT DESIGN: Fashion-forward and durable. 1、ECO-FRIENDLY: Powered by heat, no fuel consumption, no batteries or electricity required.< /span>< /p> 2、QUIET WORKING：Very quiet when working, the sound is less than 35dB. 3、FULLY AUTOMATIC WORK: Automatic start, self-regulating speed and stopping. When the temperature reaches or exceeds 60℃, the fan automatically starts working, and the speed increases as the temperature increases. When the temperature decreases, the speed slows down. When the temperature drops below 60℃, it stops working. 4、EFFECT OF HEATING CYCLE: Can quickly and efficiently circulate warm air throughout the room. Compared with no fireplace fan, the efficiency of heating cycle can be increased by