Airflow Testing & Balancing
Trusted since 1999 · Proven delivery partner
Airflow testing verifies that your HVAC system delivers the correct volume of air to each zone — ensuring adequate fresh air supply, proper extract rates, and balanced air distribution. Green Air Monitoring measures airflow at diffusers, grilles, and ductwork to identify imbalances that compromise comfort and compliance.
What We Measure
Our airflow testing covers all aspects of air distribution within your building's ventilation system.
- Supply air volume at each diffuser and grille
- Extract rates at return air grilles
- Fresh air supply rates vs. Building Regulations Part F requirements
- Air change rates per hour for each zone
- Pressure relationships between zones (positive, negative, neutral)
- Air velocity at occupied level (draught assessment)
When Airflow Testing Is Needed
Airflow testing should be conducted during building commissioning or handover, when investigating comfort complaints (hot/cold spots, stuffiness), following HVAC modifications or ductwork changes, as part of periodic ventilation performance review, and when CO₂ monitoring indicates inadequate fresh air supply.
Reporting & Recommendations
Results are presented against design specifications and regulatory requirements with clear identification of zones that are over- or under-supplied. We provide specific recommendations for damper adjustment, system modification, or operational changes to restore balanced performance.
Frequently Asked Questions
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