Testing, Adjusting & Balancing (TAB)

Today’s HVAC systems are being designed with more individually controlled temperature zones with variable airflow to improve occupant comfort and to provide the exact amount of cooling system capacity in a manner that minimizes overall energy usage. With more stringent occupant air ventilation codes and tighter building envelopes, the increased demand for fresh- and filtered-ventilation air for all occupants is placing more emphasis on fine tuning HVAC systems. Older buildings over time experience changes in internal loads and space layout changes since they were designed and built which then results in hot and cold spots in the occupied zone resulting is a decrease of operating performance, efficiency, and comfort.

Testing, Adjusting and Balancing (TAB):

Measurement and calibration of the HVAC systems to meet the design air flow and chilled water flow as required achieving the optimum thermal comfort, energy and IAQ performance.

What are the key benefits of TAB?

• Balances Air Flows within Occupied space – increasing thermal comfort and ventilation effectiveness
• Hydronic balancing of chilled water flows – reduces pumping energy
• Tuning the HVAC system – Good system design and right-sizing equipment is not enough
• Obtain real energy savings after a TAB process
• Complete Air-Side and Water-Side TAB of building’s HVAC system operations to achieve optimal and repeatable performance
• Comprehensive review of design documents to ensure HVAC systems operate as intended
• Expert Observation of the Installation process
• Produce incisive report covering the whole HVAC systems design intent and actual performance
• Troubleshoot problem areas and make adjustments on the HVAC systems to ensure prime performance
• Our TAB services use the following international standards :
  • ASHRAE Standard 111 – 1988 Practices for Measurement, Testing, Adjusting, and Balancing of Building Heating, Ventilation, Air-Conditioning, and Refrigeration Systems
  • NEBB Procedural Standards for Testing, Adjusting, and Balancing of Environmental Systems
  • AABC National Standards for Total System Balance
  • NBCTA Volume 1: Standards and Codes for Mechanical Systems in Buildings
  • ISO Standards: International Standards Organization
  • Equipment Manufacturer’s HVAC Equipment “TAB” Instructions
  • ASTM Standards of Fluid and Velocity Measurement