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Air Tightness Testing

Air tight testing Fan SetupCertified Air Tightness Tester Scheme

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 updated Technical Guidance Document Part L - Conservation of Fuel and Energy - Dwellings (2011) to the Building Regulations.

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.

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.

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Register of Airtight Testers

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

Company Name County File Number              Certification
Certified Air Tightness Tester Company Contact
Greenbuild Energy Rating & Building Information Co. Wexford 1.91.003 Single &
Multi Fan
Gavin O'Sé Co. Carlow 1.91.006 Single Fan Mark A. Shirley Co. Dublin 1.91.007 Single Fan Joe Kearney
Annaholty Energy and Engineering Service Co. Clare 1.91.008 Single Fan John Hickey
Navitus Ltd Dublin 15 1.91.009 Single Fan Oliver Walsh
Irish Energy Assessors Co. Sligo 1.91.010 Single Fan Martin Cooney
Clean Energy Ireland Ltd Co. Cork 1.91.011 Single Fan Con Dempsey
Newtown Energy Co. Wexford 1.91.012 Single Fan Seamus McQuaid
Gilroy Energy Services Co. Sligo 1.91.013 Single Fan Donal Gilroy
Sheehan Energy Services Co. Kerry 1.91.017 Single Fan Bernard Sheehan
Evolved Energy Solutions Ltd Co. Kildare 1.91.019 Single & Multi Fan Brian Sweeney
SC Air Tightness & Ventilation Co. Meath 1.91.021 Single Fan Sean Coyle
(A-rated Airtight Buildings)
Co. Dublin 1.91.022 Single Fan John Curran
2EVA.IE Co. Clare 1.91.023 Single Fan Eoin McGann
NER Solutions Co. Monaghan 1.91.025 Single Fan John Turley
MCM Energy Consultants Co. Mayo 1.91.026 Single Fan Mike Trench
Air Tightness Testing Ireland Co. Carlow 1.91.029 Single Fan Bobby Clifford
HomeBond Technical Services Ltd Co. Dublin 1.91.030 Single Fan Douglas Richie
BM Environmental Ltd Co. Cavan 1.91.034 Single Fan Sean Brady Co. Meath 1.91.040 Single Fan Cillian Donoghue
BEC Building Energy Consultants Co. Mayo 1.91.042 Single Fan Cathal Brady
ACS (Axiom Construction Services) Co. Kildare 1.91.044 Single Fan Declan White
Annaholty Energy and Engineering Service Co. Kilkenny 1.91.046 Single Fan Anthony Whittle
Retrofit Ireland Co. Wexford 1.91.047 Single Fan Brendan Sidney
Mc Clean Thermal Imaging Co. Donegal 1.91.052 Single Fan Donagh Mc Clean
Air Tightness Testing Ireland Co. Waterford 1.91.053 Single Fan Jeff O Toole
HomeBond Technical Services Ltd Dublin 6 1.91.054 Single Fan Conor Kavanagh
Evolved Energy Solutions Ltd Co. Kildare 1.91.055 Single Fan Juraj Beil
Advanced Airtight Solutions Ltd Co. Mayo 1.91.057 Single Fan Tom Monaghan
Greenbuild Energy Rating & Building Info Co. Wexford 1.91.058 Single Fan Chris Moore
Clean Energy Ireland Ltd Co. Cork 1.91.059 Single Fan Seán Costigan
HomeBond Technical Services Ltd Dublin 6 1.91.060 Single Fan Brendan McGourty
National Energy Assessors Co. Mayo 1.91.062 Single Fan Damien Cowley
JMS Design Services Go. Galway 1.91.063 Single Fan Michael Sweeney
Hession Energy Go. Galway 1.91.064 Single Fan Wayne Hession
AirMatters Co. Kerry 1.91.065 Single Fan & Multi Fan Brendan Hehir
Sugarloaf Building Maintenance Co. Wexford 1.91.066 Single Fan John Flynn
2EVA.IE Co. Carlow 1.91.067 Singl Fan Shane Davis
Nationwide Energy Consultants Co. Louth 1.91.069 Single Fan Roy O'Brien
BK O' Reilly Consulting Engineers Ltd Co. Tipperary 1.91.070 Single Fan Kieran O'Reilly
Midland Energy Consultants Co. Longford 1.91.071 Single Fan Cian Brady
Evolved Energy Solutions Ltd Co. Kildare 1.91.072 Single Fan Peter Jedrychowski
John Brick Co. Kildare 1.91.073 Single Fan John Brick
Ken Curran Co. Kildare 1.91.075 Single Fan Ken Curann
Glenair Dublin 2 1.91.076 Single Fan Michael J Cosgrave
Clean Energy Ireland Ltd Co. Cork 1.91.077 Single Fan Jason Healy
Energy First Services Ltd Co Armagh 1.91.078 Single Fan Brian Cunningham
Atlantic Developments (NI) Ltd Co. Tyrone 1.91.079 Single Fan Gerry Mallon
Airtightness Ireland Ltd Co. Down 1.91.080 Single Fan Martin Smyth
Philip Nickol
Prodomo Ireland
Co. Kerry 1.91.081 Single Fan Philip Nickol
Nationwide Energy Consultants Co. Louth 1.91.082 Single Fan Ronan McNeany Co. Meath 1.91.083 Single Fan Daniel Fennell Co. Meath 1.91.084 Single Fan Raymond Kelly
Hession Energy Co. Galway 1.91.085 Single Fan Sean Ryan
Evolved Energy Solutions Ltd Co. Kildare 1.91.086 Single Fan Barry McCann
Clean Energy Ireland Ltd Co. Cork 1.91.087 Single Fan Lukas Romanowski
Energy First Services Ltd Co. Armagh 1.91.090 Single Fan Brian Plunkett Cunnigham

Registration procedures

The registration process is straightforward and involves the following steps:

  1. The company submits its application for Single or Single and Multi Fan registration
  2. NSAI requests a pre-audit submission for review
  3. NSAI contacts the company to arrange an audit date
  4. Following the audit, NSAI issues a report to the company and agrees what further steps are required to achieve compliance.
  5. After making the required adjustments, the company is registered.
  6. The company can now use its official NSAI registration number on air test reports and Building Energy Rating (BER) Certificates for Buildings.
  7. To maintain registration, the company will undergo regular surveillance audits.

Fees and further information

For further information or an application form for on this scheme please contact

  Initial Application Fee1 Annual Registration Fee2 Initial Audit / Annual Audit
Single Fan Waived €440 €1,100
Add additional Single Fan registered tester from the same company3 €3004 - Annual Surveillance Audit included for original registered tester5
Single & Multi Fan Waived €440 €1,6505 (€1,100+€550)
Adding Multi Fan to Single Fan Registration Waived - €1,100 (or €5506)
1 Year one only 2 Applies year two and onwards 3 Companies who have successfully completed a full Single Fan registration audit may apply to add 3 additional (4 in total) airtight testers from that company subject to the folllowing restrictions. Additional airtight testers must operate in accordance with the registered companies Quality Assurance (QA) manual. Additional airtight testers must submit a sample airtight test report in accordance with I.S. EN ISO 9972:2015 and the companies QA manual. 4 Desktop review 5 Annual Surveillance Audit for additional testers will be combined with the Annual Surveillance Audit of the original registered tester from that company. 6Adding Multi Fan post single fan registration will necessitate an additional audit however if this audit is coupled with an annual audit the cost will be reduced to €550. All rates are Excl. VAT at 23%

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To purchase I.S. EN ISO 9972:2015, go to: Purchase Standards online

Orders by post should be made payable to ILI (NSAI sales partner) and addressed to:

NSAI Standards Postal Sales,
Northumberland House,
42/44 Northumberland Road,
Dublin 4, Ireland


Download the SI 259 of 2011 - Building Regulations (Part L Amendment) Regulations 2011

To download Technical Guidance Documents go to the Department of Environment’s TGD web page.

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