What is required for ventilation air distribution in ASHRAE Standard 62.1-2022?

• A. There is no requirement for balancing or documentation.
• B. Air distribution must be fixed and cannot be adjusted.
• C. Testing must be documented and the system must be balancable to verify proper air distribution.
• D. Documentation of balancing is optional if the system seems to perform well.

Answer: (C)

The requirement being tested is that ventilation air distribution must be verifiable through testing and balancing, with documentation of the results. ASHRAE 62.1-2022 expects the ventilation system to be capable of being balanced and to undergo testing to confirm that the intended airflows are actually delivered to the right spaces. This ensures the design ventilation rates are achieved, the distribution is proper across spaces, and any deviations can be identified and corrected. Documentation of the balancing process—including measurement data, equipment settings, and balancing reports—is required to demonstrate compliance and support ongoing verification.

This is why the other options don’t fit: there is a clear need for balancing and documentation, the system’s distribution is not required to be fixed and unadjustable (adjustments are part of achieving proper delivery), and documenting balancing is not optional if the goal is to meet the standard’s requirements.