Tab Journal Membership Directory Resource Center Tech Talk Commissioning Group Member Login		SERVICES OVERVIEW   AABC member firms have the required personnel, instrumentation and expertise to perform the building services detailed below. It is important to note that before balancing can begin, all systems should be 100% operational (including installation of clean filters, all diffusers and grilles properly installed, control components calibrated and operational, etc.). During the TAB phase, testing and balancing of all equipment, systems, sub-systems, and system components must be accomplished and reported. If acceptable performance cannot be achieved because of design or system deficiencies, the test data must be documented in writing and distributed to the appropriate parties for resolution. Likewise, if certain tests can not be performed due to improper installation of equipment or if system components have not yet been installed, this must also be documented in writing and distributed to the appropriate parties for resolution before testing can begin. When preparing specifications, building owners and engineers should be diligent in documenting all tests that should be performed on a specific project. Additional tests that are considered above and beyond the normal scope of testing and balancing would include: Duct Leakage Testing, Cooling Tower Performance Testing, Chiller Capacity Testing, Sound and Vibration Testing, Boiler Efficiency Testing, and Smoke Control Testing. These tests should be individually specified, along with what is required regarding each of these tests. AIR AND WATER BALANCING Air quantities are measured according to AABC National Standards, and outlets are adjusted to design requirements. Proportional fluid flow quantities are attained throughout hydronic systems in accordance with design requirements. FUNCTIONAL PERFORMANCE TESTING Testing conducted during the acceptance phase of a commissioning project to verify that systems are operating as intended in all modes and conditions. Includes testing of individual items of equipment and subsystems, to complete systems, to interfaces between systems, depending on the scope of the commissioning plan. CONTROL SYSTEM VERIFICATION Controls are set to a proper fixed mode to prevent any changes during the balancing, and proper operation is verified. HVAC COMMISSIONING A systematic, quality assurance process that facilitates and ensures the required communication, coordination, testing and verification to deliver a building whose HVAC systems perform as intended. It includes design review, installation verification, proper system start-ups, functional performance tests, operations and maintenance (O&M) training, assistance in coordination of construction schedules and sequences, and complete documentation of the HVAC systems.   CLEANROOM TESTING Cleanroom Testing Engineers certify cleanrooms and other controlled environments in accordance with industry standards and practices, including verifying leakage levels from the controlled environments and certifying filters. SOUND AND VIBRATION Sound pressure levels are measured with a properly calibrated meter in accordance with the contract specifications. Vibration of the HVAC components is measured and recorded for displacement and velocity where required by the project specifications. FUMEHOOD TESTING Proper testing of the fume hood is crucial for a safe environment. Total flow quantities, both exhaust and supply, as well as face velocities, are adjusted in order to achieve effective performance of the fume hood exhaust system. DUCT LEAKAGE TESTING This testing must be specified; it is not a required test in accordance with AABC General Specifications. Duct leakage rate is measured and recorded; unusual conditions specified; and leakage source identified. INDOOR ENVIRONMENTAL TESTING Most IAQ problems are system related and can be traced to poor ventilation. Basic IAQ investigations are performed, and the required air exchange rates are provided to ensure that the facility is receiving the appropriate air quantities. COOLING TOWER PERFORMANCE As part of a complete system balance, the cooling tower is tested to determine its capacity to perform its specified duty. Measurements for cooling tower performance must be highly accurate for safety. PRE-CONSTRUCTION PLAN REVIEW These services must be specified in addition to AABC General Specifications; they are not required. These services will assist in achieving design intent; simplify the balance procedures; reduce the time required for balancing; and substantially contribute to more efficient, economical system performance.

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