In HVAC commissioning, what does TAB stand for?

• A. Test And Balance
• B. Total Air Balance
• C. Temperature And Balance
• D. Thermal Air Benchmark

Answer: (A)

In HVAC commissioning, TAB focuses on verifying system performance by testing and balancing the systems that move air and water. The standard phrase is “Test, Adjust, and Balance,” reflecting both measuring how the system runs and then tuning controls and dampers to meet the design. Among the options, the wording that best matches the core idea is Test And Balance, because it captures the key actions of evaluating (testing) and setting correct flow or pressure relationships (balancing). The other phrases don’t reflect the industry term for this process. In practice, you would test the system, adjust components as needed, and balance the distribution to achieve the intended airflow, pressures, and comfort.