Are you worried about that there is too much the heat waste from the fireplace? And the fireplace fan can help you solve the problem, change the orientation of the heat and let your room more warm. No battery or other electricity, convenient for you to use. Features - Material: Oxidized aluminum alloy. - Size: 17 x 17 x 15 cm/6.68 x 6.68 x 5.89 inch. - Rotate velocity: 1100 r/min. - : 4pcs. - Operating Temperature Range: 60 degree centigrade - 350 degree centigrade. - Unit: 180-210 FM. - Noise: ≦ 25 . - This stove fan is powered by transforming heat into energy, without using any battery or electricity. - of working temperature is about 60 degree centigrade - 350 degree centigrade. Higher the temperature, faster it starts to spin. No higher than 350 degree centigrade. - Powered by heat, battery free, cost saving and reduced emissions from buring less fuel. - 4 design, increases comfort more quickly. Greater airflow and velocity at lower stove temperatures. - Well crafted , turly silent operation, no loud blower noise like other fans created. Package list: 1 x fireplace fan