If you own a fireplace or freestanding stove and you would like to get more heat throughout your living space with no extra cost on electricity,all you have to do is get this amazing heat powered stove fan,and you will be warm for FREE! If you buy our SF-T84 wood stove fan heat powered , you will get a free stove thermometer.it will monitors the heat to prevent you wasting fuel unnecessarily so that you only fuel the log burner when needed .ATTENTION:the fan 's optimum operating temperature range is:80C-250C (176F-482C), DON'T OVER 350C (662F) Cordless,ready to use out of color box.It does not even require maintenance,except for occasional dusting! The wood stove fan also acts as an indicator that your fire needs to be stoked. When the spinning starts to slow down,it indicates it's time to stoke the fire with more wood!