In the illustrated single zone HVAC system, what statement represents the relationship between the exhaust, outside air and recirculation dampers? Refer to Illustration GS-RS-09 Illustration GS-RS-09: the U.S. Coast Guard has not released this illustration.

Correct Answer: Option C — The more the exhaust and outside air dampers are open, the more the recirculation damper is closed, and vice versa.

Damper actuators in marine HVAC systems mechanically link the outside air and exhaust dampers to operate in tandem opposite the recirculation damper. Opening outside and exhaust dampers progressively restricts the recirculation path to optimize fresh air ventilation rates.