Modern healthcare, research, and data center facilities require highly reliable HVAC systems capable of maintaining strict environmental conditions and pressure relationships. Inadequate airflow distribution, hydronic imbalance, and poor pressure control can compromise system performance and safety in mission-critical environments. Testing, Adjusting, and Balancing (TAB) provides a structured methodology to validate and optimize system performance.

This paper presents an integrated TAB framework that includes air distribution balancing, chilled water hydronic balancing, liquid cooling system balancing, and pressurization verification for critical rooms. Field measurements were evaluated using descriptive statistics and regression analysis to quantify performance improvements.

Results indicate airflow deviation reductions of up to 74%, chilled water flow variation reductions of 72%, liquid cooling efficiency improvements of approximately 12%, and pressure stability improvements within ±0.01 in. w.g. A case study conducted at Sidra Medicine in Doha demonstrates the application of this methodology in a large healthcare and research facility. The findings highlight TAB as an essential component of commissioning and performance validation in complex HVAC systems. 

Testing, Adjusting, Balancing (TAB), HVAC systems, air balancing, hydronic balancing, chilled water systems, liquid cooling, critical room pressurization, airflow distribution, commissioning, building performance, energy efficiency, indoor air quality (IAQ), pressure differential control, healthcare ventilation, cleanroom systems, isolation rooms, operating rooms, data center cooling, thermal management, system optimization, functional performance testing (FPT), integrated system testing, HVAC diagnostics, performance verification

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