What does OA stand for in building systems?

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Study for the ACG Certified Commissioning Authority (CxA) Exam. Prepare with flashcards and multiple choice questions, each comes with hints and explanations. Ace your exam!

Multiple Choice

What does OA stand for in building systems?

Explanation:
OA refers to air from outside the building that is brought into the HVAC system for ventilation. This outside air dilutes indoor contaminants, helps maintain acceptable indoor air quality, and meets the required ventilation rates. It’s collected through outdoor air intakes, mixed with return air, and conditioned as needed. In this context, the term used is Outside air, which identifies the source as air from outdoors rather than recirculated indoor air; while some texts use Outdoor air, the concept is the same.

OA refers to air from outside the building that is brought into the HVAC system for ventilation. This outside air dilutes indoor contaminants, helps maintain acceptable indoor air quality, and meets the required ventilation rates. It’s collected through outdoor air intakes, mixed with return air, and conditioned as needed. In this context, the term used is Outside air, which identifies the source as air from outdoors rather than recirculated indoor air; while some texts use Outdoor air, the concept is the same.

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