In January of 2002, theNational Environmental Balancing Bureau(NEBB) (Gaithersburg, MD) kicked off its program for qualifying testing, adjusting, and balancing (TAB) technicians. Since 1971, it has been the intent and purpose of NEBB to certify firms and qualify persons for the purpose of performing necessary tests and inspections of building environmental systems. The TAB program qualifies supervisory personnel who possess both management and field expertise in this area. More information on NEBB can be found