Everyone knows that at midsummer garden shed doors are open, the air is hot, and it's unpleasantly sticky. Solar-powered fans or solar-powered ventilators keep the surrounding air in motion to prevent stuffy odours from developing. Solar-powered fans can also get rid of moisture, and this can prevents mould from growing. Fans can be used for supplying air and for removing air. It's advisable to use solar-powered fans to prevent damage in poorly ventilated interior spaces.