A humidifier is a device that adds moisture to the air, helping to maintain a comfortable humidity level in indoor spaces. It is especially useful in dry environments or during winter months when heating systems can reduce indoor humidity. By increasing moisture, humidifiers can alleviate symptoms like dry skin, irritated sinuses, and respiratory issues. There are several types of humidifiers, including evaporative, ultrasonic, and steam vaporizers. Each type works differently, but all aim to improve air quality. Regular maintenance, such as cleaning and replacing filters, is essential to ensure they operate effectively and prevent the growth of mold and bacteria.