![A dirty fan next to a yellow bowl of soapy water and a towel](https://cdn.thewirecutter.com/wp-content/media/2020/09/clean-fan-2048px-4.jpg?auto=webp&quality=60&width=630)
A filthy fan or air conditioner is not only less efficient at cooling you down, it’s also a potential health risk, especially if you have sensitive lungs or allergies.
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A filthy fan or air conditioner is not only less efficient at cooling you down, it’s also a potential health risk, especially if you have sensitive lungs or allergies.