In the HVAC systems, there are several heat transfer loops, in these heat transfer loops, the thermal energy is picked up from the conditioned space and expelled into the outdoor environment. The basic organs & the functional efficiency of HVAC system is depending on fixing of these heat transfer ratios to meet the desired parameters.

The methodology initiated for fixing of these heat transfer ratios is known as ''HVAC Testing Adjusting & Balancing ''

The functional efficiencies of these loops can be optimized only by fixing the heat transfer ratios. Any of these ratios being affected due to playing-up with the system during day-to-day operation, the overall system performance efficiency is going to be affected adversely

Selection of the Equipment and Components in each heat transfer loop is a design skill, but making it functional at optimum efficiency is altogether a different technique. The methodology initiated for fixing of these heat transfer ratios is known as "HVAC Testing − Adjusting & Balancing" OR "TAB HVAC"