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NSAI registered.Certified reporting.

We are NSAI registered and provide official certified air tightness test reports. Testing is carried out in accordance with I.S. EN ISO 9972:2015, the standard for determining building air permeability using fan pressurisation.

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Ventilation services

Airflow you can measure.
Performance you can assess.

Ventilation airflow testing, independent validation and duct leakage testing for domestic and commercial projects.

01 / Airflow

Ventilation airflow testing

Measure supply and extract airflow rates and compare them with the system’s design requirements.

02 / Validation

Independent ventilation validation

Assess installation and commissioning against the applicable requirements, including MVHR systems, within an agreed scope.

03 / Ductwork

Duct leakage testing

Measure air leakage from ventilation ductwork and connections to assess performance against the specified target.

Before the visit

Start with the design.

Good preparation makes the visit more useful. Share the information available for your installation.

  • System drawings and design airflow rates
  • Commissioning records, where available
  • Safe access to terminals, equipment and ductwork
  • Your programme and reporting requirements
Airtightness and ventilation are distinct services.

An airtightness registration does not establish ventilation validator status. The required competence, applicable scheme and deliverable are confirmed when agreeing the ventilation scope.

Is this the same as a blower-door test?

No. A blower-door test measures leakage through the building envelope. Ventilation tests assess the planned airflow or leakage of the ventilation system.

What should I send before booking?

Tell us the system type, building use and stage of installation. Include design airflow rates, drawings and any commissioning records you have.

What if the airflow does not meet the design?

The measured shortfall is recorded for review with your installer or project team. Further adjustment and repeat measurements can then be discussed.

Discuss your project

Let’s plan your
next test.

Tell us about your building, location and programme.