A **Respiratory Humidifier** is a medical device designed to add moisture to the air or oxygen being delivered to a patient's respiratory system. This is particularly important when individuals are receiving supplemental oxygen therapy, using CPAP/BiPAP machines, or have a tracheostomy, as the direct flow of dry gases can irritate and dry out the sensitive mucous membranes of the airways. By adding moisture, the humidifier helps to **prevent dryness, irritation, and inflammation of the respiratory tract**, making breathing more comfortable and reducing the risk of complications such as nosebleeds, sore throats, and mucus plugging. The humidifier typically contains a water chamber through which the air or oxygen passes, picking up moisture before reaching the patient. This device significantly improves the comfort and therapeutic effectiveness of respiratory support, especially during prolonged use.