Start Automatically? Upgrade Technology, Reinforced 4 Blades, Faster Speed, Larger Air Volume. The heat powered stove fan is designed to circulate the warm air created by a wood / coal or pellet burning. Efficiently circulates warm air throughout the room. Operating Temperature? No batteries or electricity required, this fireplace fan is powered by heat from the stove surface to spin. Auto start-up temperature is as low as 176°F (80°C), and higher temperatures lead to faster rotation (Don’t exceeding 608°F / 320°C). If the max temp on your stove top is even below 176°F/80°C, the fan will not work. Whisper Quiet? Newly Designed Blade, Larger Air Volume, Lower noise. You don’t even know the stove fan is there, but you feel the warmth! You will enjoy the warm air in a quiet and comfortable environment. Safty Design? The stove fan support is made with Anodized Aluminum, able to resist high temperature up to 608°F(320°C), no deformation and no discoloration even after long time working under high temperature. Longer Lifetime? There is a Bi-metallic safety device in the base of the fan. If the surface temperature rises above around 400°F (200°C), the safety device gently elevates the front of the fan to protect the TEG and motor. The fan is not effective with wood stove insert in fireplace. The surfce temperature on the location placed the stove fan shall be more than 176°F (80°C), if the temperature less than176°F (80°C), the fan will not work. Suitable for rooms less than 20 square feet; if the room is too large, exceeding 20 square feet, the temperature in the room will rise exceptionally slowly. Designed by British experts, CWLAKON has over 12 years experience in fan production, proved to be high quality and efficient. With an innovative and unique look, our stove fan is a decent decoration in room and a nice gift to friends. We have created multiple products to better accommodate different size of room. Aim for your satisfactory. We take customer experience as priority. We have a professional team to provide you a comprehensive after service, solve any problem you may have in 24 hours.