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Sustainability Through Excellence


Airtightness Testing

Air Tightness Testing

AIr TIghtness Regulations

Passive House Systems have been testing buildings since 2007. Air tightness testing is the measurement of airflow through the building envelope. Air leakages are an issue for many existing buildings, as air tightness levels were not a requirement in building regulations. 

From 2011, building regulations require an air tightness level of 7 or less air changes per hour. 


Our experienced team are fully NSAI certified. Our equipment and expertise allows us to test a range of buildings types, from studio apartments to multi-storey office blocks.

What we provide

1. NSAI Certified Engineers and procedures, ensuring that your test results are immediately recognised by architects/engineers, building control and ber assessors.

2. A rapid response from personnel who are based in Munster & Leinster.

3. A one-stop-shop for airtightness testing and mechanical ventilation testing.

4. Minimum disruption on-site with immediate results.

5. Practical, cost effective support on-site if your building fails a test.

A range of supporting services including thermal imaging and smoke tests.

7. Flexible, competitively priced service for every customer type.

All our test equipment is calibrated annually to UKAS requirements.


The following factors are vital for a successful airtightness test:

1. Test location and opening size.
2. Size and condition of house.
3. Interference to other work during test process.
4. Availability of power.
5. Accessibility to all rooms in the property.
6. Implications of unsavoury weather conditions.