Testing, Adjusting & Commissioning (TAB)

Making sure every room gets the right temperature and airflow after installation.

Even the highest-end equipment will underperform if not balanced and commissioned correctly. MVACC's dedicated TAB engineers use calibrated digital instruments to balance air velocity across every grille, verify chilled water flow rates, calibrate thermal expansion valves, and measure compressor power draw to guarantee rated efficiency.

Key Deliverables

• Airflow Hood Anemometer Balancing across All Grilles and Diffusers
• Hydronic Water Flow Balancing on Chilled/Condenser Water Loops (Circuit Setter Tuning)
• Motor Amperage, Voltage, and Power Factor Verification under Full Load
• Subcooling & Superheat Thermodynamic Diagnostics on Refrigeration Circuits
• Sound & Vibration Spectrum Analysis (dB(A) level compliance)
• Comprehensive Certified Handover TAB Report with Baseline Performance Data

Technical Specifications

• Instruments: Digital Capture Hood, Hot-wire Anemometers, Ultrasonic Flow Meters
• Standard Followed: NEBB / AABC / ISHRAE TAB Procedural Protocols
• Acoustic Target: NC 25 – NC 35 for Residential/Offices
• Balancing Tolerance: Within ±5% to ±10% of Design Airflow

Target Sectors

• General Contractors & Owners: Official handover audit ensuring contractor delivery matches design specifications.
• Green Building Projects (IGBC / LEED): Mandatory third-party commissioning credits for energy compliance.
• Data Centers & Mission Critical Sites: Thermal mapping and redundancy failover testing under simulated heat loads.

Execution Process

1. Pre-Commissioning Mechanical Checklist: Verifying duct cleanliness, damper operability, filter installation, and rotational direction.
2. Air & Hydronic Balancing: Adjusting volume control dampers and balancing valves starting from main branches to terminal grilles.
3. Electrical & Thermal Run Test: Recording delta-T (temperature split), compressor current draw, and oil pressure under peak load.
4. Certified Documentation Handover: Issuing signed test sheets with as-built flow rates, equipment serials, and warranty validation.

Frequently Asked Questions

Why is TAB necessary after HVAC installation?

Without proper balancing, rooms furthest from the AHU remain warm while rooms nearest become uncomfortably cold. TAB balances distribution so every zone receives exact design airflow and temperature.

Do you provide testing reports for IGBC or LEED green building certification?

Yes. Our comprehensive commissioning logs satisfy IGBC and LEED fundamental commissioning requirements.