Testing, Adjusting & Balancing (TAB): measurements that make commissioning decisions stronger.
TAB and specialist testing for projects in Jordan and Saudi Arabia, with measured air and water evidence supporting commissioning and handover decisions.
What TAB is for
Testing, adjusting and balancing measures air and water distribution, compares results with agreed project criteria, makes appropriate adjustments, and records what was found. It can help teams investigate uneven comfort, unstable operation, missing testing evidence, and handover questions.
Air and water balancing
Air balancing looks at distribution through equipment, ductwork, terminals, and zones. Water balancing looks at flow through relevant pumps, branches, coils, valves, and equipment connections. The agreed scope sets the detailed methods, criteria, responsibilities, and reporting.
When to involve TAB
TAB is usually most useful after relevant systems are installed and ready to run, with enough time before functional performance testing, acceptance discussions, or handover to address findings. A focused investigation can also help later when performance questions arise.
Prepare for the work
Share the project location and stage, systems, available drawings, specifications, equipment or air and water schedules, agreed criteria, site access, operating conditions, and the question the team needs answered.
Adjustment, retesting, and evidence
Where adjustment is within scope, findings can be followed by correction or adjustment and a retest. A useful report preserves conditions, results, actions, limitations, and open items so the evidence can support commissioning and handover without acting as blanket acceptance.
Specialist testing and commissioning
Duct leakage, sound, vibration, and emergency power systems verification can provide focused evidence where the agreed project scope requires it. TAB and specialist testing support whole-building commissioning; they do not replace the wider process.
Evidence across the project team
Owners and developers can use TAB records in readiness and acceptance discussions. Consultants can compare distribution evidence with the design basis. Contractors and subcontractors can use findings to coordinate corrections and retesting. Operators can receive a clearer record of measured conditions, limitations, and open items.
What a TAB report can demonstrate
A report can preserve the systems and conditions reviewed, measured observations, comparisons against the agreed basis, adjustments, retest results, limitations, responsible follow-up, and unresolved items. It is evidence for project decisions, not a blanket acceptance statement.
When is TAB typically requested?
TAB is commonly requested after relevant systems are installed and ready to run, with enough time before functional performance testing, acceptance discussions, or handover to address findings. A focused TAB investigation can also be useful later when comfort, flow, or documentation questions arise.
What information should we share before TAB?
Share the project location and stage, systems in scope, available drawings, equipment or air and water schedules, specifications, agreed criteria, and the question the team needs answered. If some information is unavailable, say so—the missing evidence is itself useful context for defining the scope.
What needs to be ready on site?
The areas and equipment need to be safely accessible, the relevant systems installed, and the electrical power, controls, terminals, valves, and other conditions needed for the agreed work available. The final readiness check depends on the system, test method, project responsibilities, and scope.
How does TAB relate to commissioning?
TAB provides measured distribution evidence that can support commissioning, functional performance testing, comfort investigations, and issue resolution. Commissioning is the wider process that connects requirements, design, installation, controls, system interactions, testing, and handover; TAB does not replace it.
What happens if results identify a deficiency?
The result is recorded against the agreed criteria and test conditions. Where adjustment is within scope, the system can be adjusted and retested; otherwise the finding is assigned to the responsible project party for correction. The report can show the original result, follow-up result, and any item that remains open.