AJTcx CxA insight
NEBB TAB and AABC test and balance: how they support commissioning
NEBB TAB and AABC test and balance describe specialist air and water measurement and adjustment work that can provide evidence for a broader commissioning process. The exact scope, criteria, and reporting obligations remain project-specific.
Author: AJTcx · Reviewer: AJTcx technical team · Published: 26 August 2026
What NEBB TAB and AABC test and balance contribute
TAB measures and adjusts air and water systems against defined criteria, then records the results. That evidence can support comfort investigations, functional testing, and issue resolution. AABC and NEBB references should always be read in the context of the agreed scope and the professionals assigned to the work.
What commissioning adds
Commissioning connects requirements, design decisions, installation, controls, sequences, testing, training, and handover. It asks how systems perform together, not only whether one distribution system has been measured.
Use both with clear boundaries
The project team should define responsibilities, test criteria, conditions, reporting, and how results will be accepted before fieldwork begins. AJTcx team capability includes individual credential domains; it does not imply firm-level NEBB or AABC accreditation.
Source basis: General TAB and commissioning definitions, with AJTcx scope boundaries. This article is educational content, not a project-specific acceptance statement or code interpretation.
Related next step
For a live project, share the location, stage, systems, and evidence available so the next useful question can be framed.