Buy EQ2-BK 2 Blade Heat Powered Wood Stove Fan Silent Eco-Friendly Fireplace Fan for Wood Log Burner Features: 1.Save Energy and Money This stove fan runs without battery or electricity. Instead, it is powered by transforming heat into energy. There is a bimetallic strip at the bottom of the base which converts a fraction of the heat passing through it into motion. When the temperature reaches 80 centigrade, the fan starts to work. 2.Self-starting and Self-regulating Start automatically when reached its minimum temperature of 50 centigrade (needs half or one minute to preheat). Higher the temperature, faster it starts to spin. When the temperature exceeds 250 centigrade, please take your fan away from stove. The stove fan adjusts its speed with the stove temperature. The higher temperature, the b lades spin faster, and the more hot air pumps into room. When the b lades slow down, it means you should stoke the stove. Room temperature can