Certified Air Tightness Tester Scheme

Introduction

Under revised building regulations which came into force in January 2008, air tightness testing is mandatory for all dwellings. Further improvements to backstop performance levels have come into effect with the publication of the updates to the Technical Guidance Document to the Building Regulations Part L - Conservation of Fuel and Energy - Dwellings (2011)  and  Part L - Conservation of Fuel and Energy - Dwellings (2017)

NSAI operates a registration scheme that certifies testers to I.S. EN ISO 9972:2015 - Thermal Performance of Buildings – Determination of Air Permeability of Buildings – (Single or Single & Multi) Fan Pressurization Method.

Looking for an Airtightness Tester?

I.S. EN ISO 9972:2015 - Thermal Performance of Buildings - Determination of Air Permeability of Buildings – (Single or Single & Multi) Fan Pressurization Method.

What does the Scheme Involve?

Under the scheme, NSAI inspectors assess the operations and procedures of air tightness testers. NSAI inspectors witness an airtightness test against the requirements of I.S. EN ISO 9972:2015. 
Inspectors also carry out an assessment of:

• A number of Airtightness test reports.
• That appropriate records are maintained for completed tests.
• Test equipment is adequately maintained and under calibration.
• Health & Safety documentation is in place.

When our inspectors are satisfied that the tester is in compliance with the scheme requirements, the applicant company receives an NSAI Certificate of Registration.

What are the Benefits?

For air tightness testers, the benefits of I.S. EN ISO 9972:2015 registration are far-reaching.
The scheme:

• Helps developers and householders demonstrate compliance with the higher levels of energy conservation required under the Building Regulations 2011 Part L Technical Guidance Document
• Entitles the air testing company to use its NSAI registration number in business transactions
• Lists the company on the NSAI-maintained Directory of Registered Air Tightness Testers
• Provides independent reassurance to customers of the reliability of the air testing company.

What are the Fees?