TAB: TESTING, ADJUSTING AND BALANCING is a process where heating and air conditioning systems are tested against design standards, adjusted for maximum efficiency, and balanced to provide optimum comfort for the occupants. The work typically covers balancing and adjusting air and water distribution in areas of the building served by an HVAC system, and verification and adjustment of heating and cooling loads to ensure proper indoor environmental conditions are maintained. Areas that do not meet the engineer’s design standards are referred to the appropriate party for correction. Reports are prepared documenting performance and compliance with design standards.