What is TAB calibration and when does your project need it?

What does TAB mean?

Testing,Adjusting and BalancingIt means measuring the performance of the system,then adjusting the equipment,outlets and valves,then balancing the quantities between areas to reach as much as possible the values specified in the design.

What do we measure in air systems?

• The amount of air at the outlets and inlets.
• Air speed and duct pressure.
• Performance of fans and air handling units.
• Rotor position and fan speeds.
• Temperatures at selected points.

What do we measure in Chiller systems?

• Water flow in lines and units.
• Pressure difference and inlet and outlet temperatures.
• Pump performance and valve placement.
• Balance of branches and files.

When does a project need a TAB?

1. After installation of a new system is completed and before delivery.
2. When there are cold and hot rooms despite the appliances working.
3. After major modifications in the tract,use,or division of spaces.
4. When noise is high or specific outputs are weak.
5. Within the energy efficiency improvement project.

Budget implementation steps

You start by reviewing the drawings and design schedules,then inspecting the system and ensuring its readiness. Initial measurements are recorded,adjustments are gradually made from the main branches to the outlets,then the measurements are repeated and a report is issued showing the design and actual values,the percentage of deviation,and recommendations.

Benefits of TAB for the project

• Improve comfort and air distribution.
• Detect bottlenecks,leaks,or installation errors.
• Reduce over-running and unnecessary compensation.
• Providing a documented reference for operation and maintenance.
• Proof of system performance upon delivery.

Learn about the scopeChiller and duct calibration service TABOr seeGuide to duct and insulation.