For A/C ducts, how high should cool air output "supply" ducts be mounted in the cabin?

Mounting cool air output "supply" ducts at waist height or higher in the cabin is essential for achieving effective air distribution and comfort. Positioning the ducts at this height allows for the cooling air to disperse more evenly throughout the space. When outlets are located above head height, the air may not be able to mix effectively with warmer air that rises, potentially leading to discomfort and inefficient cooling.

By placing the supply ducts at waist height, the cooler air can blend seamlessly with the surrounding air, enhancing the overall climate control within the cabin. This strategic height helps prevent cold air from settling too low, where it could create drafts rather than a uniform temperature, significantly improving occupant comfort. Additionally, it reduces the risk of obstruction from furniture or other elements typically found in marine environments, maintaining efficient airflow.

Choosing to mount ducts at varying heights depending on design introduces complexities in airflow dynamics and may not guarantee the same level of consistent comfort that is achievable with a standard height. Thus, settling on waist height or higher is the most effective approach for cooling systems in cabins.