On marine AC systems, return air ducts should be?

In marine air conditioning systems, the design of return air ducts plays a critical role in ensuring efficient airflow and proper system functioning. When return air ducts are designed to be larger than supply ducts, it enhances the overall air circulation in the system.

Having return ducts that are larger allows for less resistance to airflow, enabling the system to effectively draw in the air that needs to be cooled or heated. This improved airflow reduces the strain on the air conditioner’s blower, leading to better performance, lower energy consumption, and increased longevity of the system.

Additionally, when return air ducts are appropriately sized, it's easier to maintain balanced pressure within the system, which minimizes the occurrence of issues such as drafts or uneven temperature distribution throughout the living space.

In contrast, ducts that are smaller than necessary can restrict airflow, creating potential problems like increased noise from air turbulence, inefficient operation, and additional wear on the system components. Thus, ensuring that return air ducts are larger than supply ducts is beneficial for optimizing the performance of marine AC systems.