In retrocommissioning implementation phase, which activity involves performing TAB on existing?

In retrocommissioning implementation phase, which activity involves performing TAB on existing?

• A. Perform TAB on existing
• B. FPTing
• C. Review O&M staff training
• D. Cx final report

Answer: (A)

In retrocommissioning, the implementation phase is about putting the recommended changes into operation and confirming they actually work in the building. The activity that involves the actual field work of testing, adjusting, and balancing the building’s existing HVAC distribution is performing TAB on the existing system. TAB in this context means measuring airflow, pressures, and temperatures, then adjusting dampers, VAV boxes, and controls to achieve the intended airflows and balance across zones. This step is essential to ensure the system delivers the correct quantities of air after modifications, supports occupant comfort, and helps realize energy savings. Functional Performance Testing focuses on whether systems perform their intended functions, but TAB on existing specifically addresses balancing and verification of air distribution in the current setup. Reviewing O&M staff training is about preparing personnel, and the final Cx report documents results and recommendations rather than performing the field balancing.

In retrocommissioning, the implementation phase is about putting the recommended changes into operation and confirming they actually work in the building. The activity that involves the actual field work of testing, adjusting, and balancing the building’s existing HVAC distribution is performing TAB on the existing system. TAB in this context means measuring airflow, pressures, and temperatures, then adjusting dampers, VAV boxes, and controls to achieve the intended airflows and balance across zones. This step is essential to ensure the system delivers the correct quantities of air after modifications, supports occupant comfort, and helps realize energy savings.

Functional Performance Testing focuses on whether systems perform their intended functions, but TAB on existing specifically addresses balancing and verification of air distribution in the current setup. Reviewing O&M staff training is about preparing personnel, and the final Cx report documents results and recommendations rather than performing the field balancing.