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Normal human body temperature is 37 degrees Celsius. Ambient temperature rises during summer. And if this is the case, our body cools by releasing sweat. This only happens when the humidity level is low. But sweat doesn’t work as well when humidity levels rise. As a result we get uncomfortable. Because there is enough moisture in the air, the water that is released from our body is delayed, or cannot be absorbed. And this is where the fan helps.