Testing, Adjusting and Balancing (TAB)

The job of a Testing, Adjusting and Balancing (TAB) technician is fundamental and necessary to the proper functioning of HVAC systems. It involves not only technical skills but also mathematics, knowledge of system designs, communication skills, and integrity.

• Testing: involves taking electrical, hydronic, and airflow measurements on HVAC equipment to determine if the system is operating properly.

• Adjusting: Regulating the fluid flow rate of both water and air to assure that the HVAC system is operating within its design parameters. (e.g., changing fan speed, setting outside air dampers, throttling a pump etc.)

• Balancing: Proportioning flows within a distribution system according to design quantities. (e.g., turning dampers in ductwork to ensure that the proper amount of air is flowing through each outlet or zone etc.)

A TAB technician has one of the most technical careers in the sheet metal industry. In addition to good math skills, problem solving skills, and interpersonal skills, the TAB technician must understand the workings of things as varied as pumps, fans, automatic control systems, and more. He or she must also be able to understand the system designer’s intent for how the system should operate, discern whether that is actually the case, and if not, how to make adjustments to correct the problem.

In this curriculum you’ll learn about using instruments to measure air flow, water flow, pressure, relative humidity, and temperature. You’ll learn about the properties of air, how those properties work together for the comfort of the building inhabitants, and what adjustments you can make to an HVAC system to move those properties to a more comfortable place.

You’ll learn about methods of balancing airflow and hydronic flow to optimize the performance of heating and cooling systems. You’ll even learn electrical theory especially as it applies to systems with which you’ll be working.

Your goal upon completing these courses is to have a foundational knowledge to begin working in the field of Testing, Adjusting, and Balancing. This curriculum should also prepare you to become a TABB certified technician.