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Feature:1. The furnace fan supplies power by converting the transition into energy, without using any batteries or electricity.2. The working temperature range is approximately: 140°F/60°C~662°F/350°C, the higher the temperature, the faster it starts to spin.Note: When using the stove fan, the tempe..

Feature:1. This stove fan supplies power by converting the transition into energy without using any batteries or electricity.2. The working temperature range is approximately: 140°F/60°C~662°F/350°C, the higher the temperature, the faster it starts to rotate.Note: When using stove fans, the temperat..