What term describes the air supplied in a crematory retort?

The term "primary air" refers to the initial supply of air in a crematory retort that is essential for the combustion process. In the context of cremation, primary air is introduced directly into the combustion chamber and plays a crucial role in supporting the ignition and burning of the material being cremated, including the body and the combustible materials, such as casket and clothing.

The correct identification of primary air is important because it signifies the initial airflow required for effective combustion. This supply of air generally helps in achieving adequate temperatures and efficient burning, which are critical to ensure complete cremation and minimize emissions.

Other terms like secondary air, while relevant in the overall combustion process, come into play after the initial supply of primary air. Forced air denotes a type of airflow that is actively pushed into a system, typically through mechanical means, and may not accurately reflect the natural air supply involved in the cremation process. Ambient air refers to the surrounding air in the environment but is not specifically supplied to the retort as primary air is.