The National Standards Authority of Ireland (NSAI) operates a registration scheme that certifies testers to I.S. EN 13829:2000 – Thermal Performance of Buildings – Determination of Air Permeability of Domestic Buildings – (Single or Single & Multi) Fan Pressurization Method.

Under this scheme NSAI’s inspectors:

• assess the operations and procedures of airtightness testers;
• witness an airtightness test against the requirements of I.S. EN 13829:2000;
• carry out an assessment of a number of airtightness test reports;
• ensure that appropriate records are maintained for completed tests;
• ascertain that test equipment is adequately maintained and under calibration;
• ensure that health & safety documentation is in place.

The NSAI Certificate of Registration is obtained once the tester is in compliance with the scheme requirements and is then approved by the inspectors.