The answer to 'difference between humidifier and' is that a humidifier and dehumidifier are both devices used to control the moisture levels in the air, but they serve different purposes. A humidifier adds moisture to the air, while a dehumidifier removes moisture from the air.
Humidifiers are useful in dry climates or during the winter months when indoor air can become overly dry, which can lead to problems like dry skin, static electricity, and respiratory issues. Dehumidifiers, on the other hand, are helpful in humid environments or during the summer months when excess moisture in the air can cause mold, mildew, and musty odors.