Ducts exposed within conditioned space do not require sealing under certain conditions, true or false?

Ducts exposed within conditioned spaces do not require sealing under specific conditions primarily because they are already within an environment that maintains a controlled temperature and moisture content. When ductwork is located in an area that is heated or cooled, it is assumed to be part of the conditioned space; thus, leakage from the ducts is less critical when considering energy loss or humidity control, as the air in this space is already maintained at a desired level.

Sealing is typically required to prevent energy loss and to control airflow in unconditioned spaces. However, when ducts are fully contained within areas that maintain a comfortable environment, such as living spaces, the need for sealing can be reduced. Therefore, if the conditions are right—meaning the ductwork is fully within a conditioned zone, appropriate sealing may not be necessary.

This understanding aligns with building codes and energy efficiency standards, which help ensure proper airflow and minimize energy loss in specific contexts.