Referring to illustrated diagram, what type of HVAC system is shown? GS-RA-09 Illustration GS-RA-09: the U.S. Coast Guard has not released this illustration.

Correct Answer: Option D — A single zone system

A single zone HVAC system conditions air at one central AHU and distributes it uniformly to a single thermal zone, controlled by a solitary space thermostat modulating heating and cooling outputs without individual room zone adjustments.