Air Tightness Testing

Pulse Air Tightness Testing – Accurate, Low-Pressure Results for Retrofit Projects

At Nexus EcoBuilt, we provide professional air tightness testing services for existing buildings using the innovative Pulse testing method. Our expert team helps identify air leakage and supports energy-efficient retrofitting in line with PAS 2035 – Pathway C requirements.

Why Air Tightness Testing Matters

Air tightness testing is essential to understanding how much conditioned air (heated or cooled) escapes from a building through gaps and cracks in its thermal envelope. In other words, it tells you how draughty a property is—something that directly affects energy bills, indoor comfort, and the effectiveness of insulation and ventilation systems.

The Pulse Method – Low Pressure, High Accuracy

Unlike traditional blower door tests, Pulse Air Tightness Testing uses low pressure to simulate real-life conditions. This gives a more accurate picture of how the building performs under normal use.

Our device can test:

• The entire building envelope, including all doorways

• Individual rooms, when needed

This method is fully approved under the Part L Building Regulations in England and Wales and is recognised as a compliant test under PAS 2035 retrofit standards—making it a smart and regulation-ready choice for your retrofit project.

Supporting Smarter Retrofit Design

Air tightness test results play a crucial role in shaping both ventilation strategies and energy-saving measures. Whether you’re at the planning stage or post-installation phase, our testing service supports informed decisions and long-term performance.

Want to book an air tightness test or learn more?

📧 Email us at compliance@nexusecobuilt.co.uk
📞 Call 00447404057689 to speak with our team.

Let Nexus EcoBuilt help you take control of your property’s energy performance—accurately and efficiently.