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Part F: Natural Ventilation Testing

  /  Part F: Natural Ventilation Testing

Part F: Natural Ventilation Testing

Testing, certification, and compliance support for residential ventilation systems

Delivering compliant, effective ventilation performance through testing and verification.

Part F of the Building Regulations requires that ventilation systems are not only correctly designed, but also tested and verified on site to ensure they achieve adequate airflow and maintain indoor air quality.

MES Building Solutions provides ventilation testing and compliance support, helping residential developments demonstrate that installed systems perform as intended. We work closely with site teams to ensure systems are correctly installed, commissioned, and ready for testing; minimising delays and rework at completion.

Our approach ensures a smooth pathway to Building Control sign-off, supported by clear and reliable test results.

Openable windows and vents assessed for Part F natural ventilation compliance.

Pre-Test Guidance

Advice to ensure systems are installed, accessible, and ready for testing

Ventilation Testing

On-site airflow testing of ventilation systems using calibrated equipment in line with regulatory standards

Performance Verification

Assessment of whether installed systems meet required airflow rates and design intent

Certification & Reporting

Provision of clear test results and certification to support Building Control approval

Why Ventilation Testing Matters

Ventilation systems play a critical role in maintaining healthy indoor environments, particularly modern airtight buildings.

Testing ensures systems perform as designed, avoiding issues with indoor air quality, condensation, and compliance at final inspection.

Improved indoor air quality

Compliance with Building Regulations

Reduced risk of rework or failed inspections

Better-performing, healthier homes

Our Ventilation Testing Process

01

Initial Review

Assessment of system type and project requirements

02

Pre-Test Preparation

Guidance to ensure systems are ready and accessible for testing

03

On-Site Testing

Airflow measurements taken across ventilation systems

04

Certification & Sign-Off

Issuing of test results and documentation for Building Control

Part F report created following testing of building for natural ventilation provision.

Preparing for Your Ventilation Test

Background ventilators (trickle vents) installed and fully open

Internal doors installed with required undercuts

Extract fans fitted, operational, and accessible for testing

All rooms complete with no blocked vents or terminals

Power available on site for system operation

Clear access to all ventilation points and rooms

Need some more information? See our Guide to Natural Ventilation Testing.

Related Performance Testing Services

Additional services and guidance on the topic: