It has a built-in bi-metal strip to monitor temperature changes during use, easy to use and stable. It is also safe and noiseless. It is an excellent addition to any home heating system. Color: Black. Product Size: Approx. 19x10.5x7.5cm/7.48x4.13x2.95 inches Power Supply: Thermoelectric Module (Thermal Power) Material: Aluminum Airflow: 203CFM Air Flow Range: 160 to 220 to 220 wind speed range: 1 wind speed range: 160 - 220 wind speed range: 1 wind speed range: 1 00-1 600 rpm start temperature: 50 ℃ (fireplace surface temperature) Working temperature: 50 ~ 400 ℃ (fireplace surface temperature) Noise level: 15-18 dB Recommended distance: 10-15 CM Product Features: 1. Automatic adjustment: Fireplace fan automatically starts up and adjusts the speed according to the temperature of the furnace 2. Low energy consumption: low consumption, high efficiency, increase 41% 16% Stove thermoelectric fan does not use batteries or electricity to improve the heating efficiency of the stove, so warm air can flow rapidly into the room. Operating principle thermoelectric technology to convert temperature difference into electric energy. The center of the fan has its own thermoelectric module, when it is heated, it produces cold surfaces and hot surfaces, electronics flow into the module to produce electric energy to operate the fan. Also known as the Beck effect. Note: The furnace fan does not cause direct temperature rise, and is only a tool to promote heat transfer of the chimney. Stove fan should be placed on a flat surface. List: 1 x Fireplace Fan