Construction closeout
Verify system performance before turnover and identify issues while trades remain mobilized.
Test & balance
Test, Adjust & Balance
Measured HVAC performance, field adjustments and clear reporting that supports design verification, commissioning and facility decisions.
Request a Scope ReviewService overview
Performance evidence—not a box-checking exercise.
Testing, adjusting and balancing is the field process used to verify how an HVAC system actually performs compared with its design intent. It is not simply a final set of airflow readings. Effective TAB evaluates equipment operation, distribution-system performance, balancing-device positions, control response and the relationships between connected spaces.
Micron combines methodical measurement with practical mechanical-system knowledge. That broader view helps contractors, engineers and owners identify whether a deficiency originates at the equipment, duct or piping system, terminal device, controls sequence or room boundary.
Scope of work
What this service may include.
The final test or work plan is built around your facility, applicable requirements, operating conditions and the decision the report must support.
Supply, return, exhaust and outside air
Hydronic flow measurement and balancing
Cleanroom pressure relationships
Commercial and pharmaceutical TAB
Duct leakage and building pressure testing
HVAC commissioning and verification support
When to call Micron
Common reasons clients engage this service.
Early engagement helps clarify prerequisites, reduce failed visits and prevent important requirements from being discovered at closeout.
Renovation or system change
Re-establish air and water distribution after equipment, controls or space-use modifications.
Comfort or pressure complaints
Investigate hot and cold zones, inadequate airflow, exhaust imbalance or unstable room relationships.
Energy and capacity concerns
Determine whether the system is delivering required performance before adding equipment or changing setpoints.
Specialist services
Explore the right scope for your facility.
These focused pages explain typical test elements, preparation needs and reporting considerations for common applications.
Pharmaceutical facilities
Pharmaceutical Test & Balance
Air and hydronic balancing for pharmaceutical facility systems.
View service Controlled environmentsCleanroom Test & Balance
Airflow balancing and pressure-relationship checks for controlled environments.
View service Credentialed performanceNEBB Test & Balance
Project TAB aligned to required credentials, disciplines and reporting expectations.
View serviceOur process
A clearer path from scope to closeout.
Every project is different, but the discipline behind reliable results is consistent.
Scope review
Confirm facility conditions, required methods, acceptance criteria, schedule and reporting expectations.
Readiness planning
Identify documents, access, operating states and prerequisites needed before mobilization.
Field execution
Perform the agreed work with calibrated instruments, documented conditions and active coordination.
Reporting and follow-through
Present results, observations and deficiencies in a form the responsible teams can act on.
What you receive
Documentation designed for the next decision.
A report is valuable only when the owner, quality team, engineer or contractor can understand what was tested, what the result means and what remains unresolved.
Discuss Your Reporting NeedsEquipment and terminal-device measurements compared with design values
Documented final settings and balancing-device positions by scope
Deficiency log with field observations and items requiring other trades
NEBB report format when specified and included in the contracted scope
Frequently asked questions
What project teams ask before scheduling.
Exact requirements vary. These answers provide a starting point for defining your facility-specific scope.
When is an HVAC system ready for TAB?
Equipment should be installed and started, filters clean, controls functional, dampers accessible, ceilings substantially complete and systems operating in the intended mode. Early readiness review prevents avoidable remobilization.
Can TAB correct every airflow problem?
No. Balancing devices can redistribute available capacity, but TAB cannot create missing fan capacity, repair major duct restrictions, correct incomplete controls sequences or replace deficient design. Those conditions should be identified and assigned for correction.
What is the difference between air balancing and hydronic balancing?
Air balancing measures and adjusts supply, return, outside and exhaust air. Hydronic balancing measures and adjusts water flow through pumps, coils and distribution circuits. Many systems require both disciplines to reach intended performance.
Why perform TAB in a cleanroom?
Cleanroom airflow volumes and pressure relationships are interdependent. TAB establishes the air distribution that supports room pressurization, air-change targets and subsequent certification testing.
Related technical guidance
Build a better-informed testing plan.
Cleanroom certification · October 5, 2026
ISO 14644 Is Only the Starting Point: Is Your Contamination-Control Program Inspection-Ready?
Cleanroom classification is essential, but it is only one part of a defensible contamination-control system.
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Fume Hood Testing and Certification
Why fume-hood design, airflow, alarms, inspection and periodic performance testing matter for laboratory personnel protection.
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Technical guide · May 13, 2020
Understanding Clean Room Classifications
A detailed comparison of Federal Standard 209E, ISO 14644-1, FDA aseptic-processing guidance, EU GMP classifications and ICH Q7 contamination-control expectations.
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