1) Humidification and nebulization are important adjuncts to chest physiotherapy by maintaining proper humidity levels in the airways. 2) Various types of humidifiers and nebulizers are used to deliver humidified air or medications to patients with compromised respiratory function or those on mechanical ventilation. 3) Humidification helps maintain airway secretions, protects the respiratory tract, ensures proper ciliary function and mucociliary clearance. Nebulization aids in delivering bronchodilators, mucolytics and other drugs to facilitate chest physiotherapy.