A Hot Air Oven is a sterilizing machine which is used for sterilizing the instruments with the help of dry heat. It is also known as dry heat sterilization. A hot air oven is used for heating products at uniform temperatures. The airflow with heat from the Hot Air Oven by fusion product controls the humidity level by removing moisture. Microorganisms and bacterial spores can be simply destroyed by the Laboratory hot air ovens with precise temperatures. To kill microorganisms an oxidation method is involved, This process is used to kill microorganisms and they are oxidized.

It is mainly applicable to samples that are heat resistant. Successful sterilization can as it were to be accomplished when a suitable temperature and holding time are chosen depending on the type of microorganisms being sterilized. Louis Pasteur evolved the process of dry heat by using a Hot Air Oven. These air convection ovens have applications in many fields e.g. laboratory, medical, pharmaceutical and textile industries.