According to the Testing, Adjusting, and Balancing Bureau (TABB) of the National Energy Management Institute Committee (NEMIC), "The purpose of TAB is to ensure that an HVAC system is providing maximum occupant comfort at the lowest energy cost possible."
"HVAC contractors who don't perform TAB work misunderstand the necessity for TAB testing," said Roy Ringwood, board trustee of the Labor Management Coalition Trust (LMCT) between Orange County (Calif.) Local Sheet Metal Union 105 and Orange Empire Sheet Metal and Air Conditioning Contractors' National Association (SMACNA).