In HVAC terminology, what does RA stand for?

In HVAC terminology, what does RA stand for?

• A. Return Air
• B. Relative Airflow
• C. Radiant Air
• D. Reactive Air

Answer: (A)

In HVAC terminology, RA stands for Return Air. This is the air that is drawn from the conditioned space back into the HVAC system to be filtered, conditioned again, and then re-sent into the space. It travels through return ducts or plenums back to the air handling unit, where it mixes with outdoor air as needed before being supplied again. This is different from supply air, which is the air being delivered to the space, and from outdoor air, which is the fresh air brought in for ventilation. The other terms listed aren’t standard abbreviations in this context.

In HVAC terminology, RA stands for Return Air. This is the air that is drawn from the conditioned space back into the HVAC system to be filtered, conditioned again, and then re-sent into the space. It travels through return ducts or plenums back to the air handling unit, where it mixes with outdoor air as needed before being supplied again. This is different from supply air, which is the air being delivered to the space, and from outdoor air, which is the fresh air brought in for ventilation. The other terms listed aren’t standard abbreviations in this context.