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Part F: MEV Commissioning

  /  Part F: MEV Commissioning

Part F: MEV Commissioning

Testing, commissioning, and certification for Mechanical Extract Ventilation systems

Delivering compliant, effective ventilation performance through testing and verification.

Mechanical Extract Ventilation (MEV) systems must be properly commissioned and balanced to ensure they achieve the airflow rates required under Part F of the Building Regulations.

MES Building Solutions provides MEV commissioning and compliance support, ensuring installed systems perform as designed. We work with contractors and installers to verify airflow performance, identify issues, and provide clear certification for Building Control.

Our approach focuses on practical coordination and efficient testing, helping projects achieve compliance without delays or rework.

Mechanical extract ventilation commissioned building-wide for Part F compliance.
Sailmakers, London

Pre-Commissioning Advice

Advice to ensure systems are correctly installed, accessible, and ready for commissioning

Airflow Testing & Balancing

Measurement and adjustment of airflow rates at terminals to meet design requirements

Performance Verification

Confirmation that installed systems achieve required extract rates across all wet rooms

Certification & Reporting

Provision of commissioning certificates and documentation to support compliance and sign-off

Why MEV Commissioning Matters

Correct commissioning ensures ventilation systems deliver consistent, reliable airflow, supporting indoor air quality and regulatory compliance.

Without commissioning, systems may underperform; leading to failed inspections, poor air quality, and costly remedial works.

Improved indoor air quality and system performance

Compliance with Building Regulations Part F

Reduced risk of rework or failed inspections

Confidence in installed system performance

Our MEV Commissioning Process

01

Initial Review

Assessment of system type, layout, and commissioning requirements

02

Pre-Commissioning Checks

Verification that installation is complete and ready for testing

03

On-Site Testing

Measurement and balancing of airflow rates

04

Certification & Sign-Off

Issuing of commissioning certificate and compliance documentation

Airflow measurements taken during MEV commissioning and system verification.

Preparing for MEV Commissioning

MEV unit installed, operational, and accessible

Ductwork complete, connected, and airtight

Extract terminals installed and accessible for testing

All rooms complete with no blocked vents or terminals

Power available on site for system operation

Clear access to all terminals and the MEV unit

Need some more information? See our Guide to MEV Commissioning.

Related Performance Testing Services

Additional services and guidance on the topic: