The Ecofan is designed to be used on freestanding wood stoves with normal surface temperatures between 300 and 650 degree Fahrenheit. The 3 blades move air up to 150 cubic feet per minute. Temperatures above 650 degree Fahrenheit may damage your Ecofan. Once your Ecofan is in operation the heat sensitive spring will gently tilt the fan as your stove temperature increases to help protect it from overheating. Relocate your Ecofan to a cooler spot on your stove if the surface temperature exceeds 650 degree Fahrenheit. Good wood stove safety practice includes using a stove thermometer. Do not touch the base when in use it is hot. For optimum performance, placement on the stoves surface is critical. Be sure to position the Ecofan on the stovetop so that cool air will be drawn over the cooling fins. The Ecofan should not be used directly in front of the stove pipe or at the front of the stove. Place the Ecofan at the back edge of the stove. Overheating will reduce the EcoFan effectiveness and may damage the thermoelectric module and void the warranty. Remove the Ecofan from stove if temperature exceeds 650 degree Fahrenheit. The Ecofan starts automatically and adjusts its speed with the stove temperature. As the stove heats up the Ecofan runs faster to move more warm air into the room. As the stove burns down and cools the Ecofan automatically shuts off. Warm air is pushed out into the living area rather than just rising to the ceiling above the stove. This improves the heating effectiveness of the stove and results in greater room comfort and less fuel consumption. Using only the heat from the stove the Ecofan is the most economical way to effectively circulate warm air. No cords plugs or batteries are required. The unique Ecofan blade is designed to deliver a broad cross section of gentle air movement to avoid uncomfortable drafts.