A hot air oven is a device used for heating and sterilizing items using dry heat. It consists of an enclosed chamber that is heated to a specific temperature by an electric heating element or gas burner. The hot air circulates inside the oven, ensuring even distribution of heat and effectively sterilizing the items placed inside. Hot air ovens are commonly used in laboratories, medical facilities, and research institutions for sterilizing equipment, glassware, and other heat-resistant materials.