A humidifier is a device that can be attached to any air conditioning or heating system to control the humidity levels in a room or building. Inside the humidifier is a device that senses the humidity in the air and when this device senses change, it cycles the humidifier on/off. A humidifier adds moisture to the air to cut down on static electricity, itchy dry skin, and protects your home’s wooden surfaces. It can also help prevent many issues with health. Dry air has been known to promote the cold and flu viruses during the cold seasons. Dry air can also affect people with respiratory issues and lead to sinus headaches and nosebleeds. Dry air can affect wooden surfaces in your home, furniture, and musical instruments, causing them to warp or permanent damage.