Referring to illustrated diagram, what type of HVAC system is shown? GS-RA-43 Illustration GS-RA-43: the U.S. Coast Guard has not released this illustration.

Correct Answer: Option C — A dual duct system

Dual duct systems utilize two separate supply air ducts, one carrying cold air and the other carrying warm air. These streams are mixed at individual zone terminal boxes to achieve the desired temperature, allowing for independent heating and cooling control across multiple zones served by the same central air handling unit.