How to Use: 1. Place the fan on the fireplace and wait for the base temperature to get to 60 ℃. The electric heating conversion module will start and generate current. 2. The power generation module continues to work, generates current and drives the motor, which drives the fan to rotate the blade. Specification: Item Type: 3 Blades Heat Powered Stove Fan Material: Aluminum Alloy Operating Temperature: 60 to 350°C Air Flows: 200 to 250cfm (Maximum) Running Speed: 1500rpm (Maximum) Noise: <25db Product Size: 22.5 x 13 x 8cm / 8.9 x 5.1 x 3.1in Uses: Used to Circulate Warm Air Produced by Wood, Coal or Pellet Burning Stove at a Faster Rate Package List: 1 x 3 Blades Heat Powered Stove Fan