Certified 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.

Back to top

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 contact@greenbuild.ie
2Eva.ie Co. Carlow 1.91.006 Single Fan Mark A. Shirley mas@2eva.ie
Bercerts.ie Co. Dublin 1.91.007 Single Fan Joe Kearney joseph@bercerts.ie
Annaholty Energy and Engineering Service Co. Clare 1.91.008 Single Fan John Hickey annaholtyenergy@yahoo.ie
Navitus Ltd Dublin 15 1.91.009 Single Fan Oliver Walsh ollie@navitus.ie
Irish Energy Assessors Co. Sligo 1.91.010 Single Fan Martin Cooney info@irishenergyassessors.com
Clean Energy Ireland Ltd Co. Cork 1.91.011 Single Fan Con Dempsey Con@cleanenergyireland.ie
Newtown Energy Co. Wexford 1.91.012 Single Fan Seamus McQuaid info@newtownenergy.ie
Gilroy Energy Services Co. Sligo 1.91.013 Single Fan Donal Gilroy donal@gilroyenergy.ie
Sheehan Energy Services Co. Kerry 1.91.017 Single Fan Bernard Sheehan bernard@airtightnesstesting.ie
Evolved Energy Solutions Ltd Co. Kildare 1.91.019 Single & Multi Fan Brian Sweeney brian@evolvedenergy.ie
SC Air Tightness & Ventilation Co. Meath 1.91.021 Single Fan Sean Coyle info@scairtightnessandventilation.ie
(A-rated Airtight Buildings)
Co. Dublin 1.91.022 Single Fan John Curran info@abuild.ie
2EVA.IE Co. Clare 1.91.023 Single Fan Eoin McGann emg@2eva.ie
NER Solutions Co. Monaghan 1.91.025 Single Fan John Turley mc2rating@gmail.com
MCM Energy Consultants Co. Mayo 1.91.026 Single Fan Mike Trench info@mcmenergyconsultants.com
Air Tightness Testing Ireland Co. Carlow 1.91.029 Single Fan Bobby Clifford bobbyclifford2@gmail.com
HomeBond Technical Services Ltd Co. Dublin 1.91.030 Single Fan Douglas Richie dritchie@homebond.ie
BM Environmental Ltd Co. Cavan 1.91.034 Single Fan Sean Brady sean@bmenergy.ie
Bercerts.ie Co. Meath 1.91.040 Single Fan Cillian Donoghue         joseph@bercerts.ie
BEC Building Energy Consultants Co. Mayo 1.91.042 Single Fan Cathal Brady cathal@becs.ie
ACS (Axiom Construction Services) Co. Kildare 1.91.044 Single Fan Declan White axiomconstructionservices@outlook.com
Annaholty Energy and Engineering Service Co. Kilkenny 1.91.046 Single Fan Anthony Whittle anthonyjwhittle@gmail.com
Retrofit Ireland Co. Wexford 1.91.047 Single Fan Brendan Sidney info@retrofit.ie
Mc Clean Thermal Imaging Co. Donegal 1.91.052 Single Fan Donagh Mc Clean info@thermalimaging.ie
Air Tightness Testing Ireland Co. Waterford 1.91.053 Single Fan Jeff O Toole passivehousesolutions@hotmail.com
HomeBond Technical Services Ltd Dublin 6 1.91.054 Single Fan Conor Kavanagh ckavanagh@homebond.ie
Evolved Energy Solutions Ltd Co. Kildare 1.91.055 Single Fan Juraj Beil brian@evolvedenergy.ie
Advanced Airtight Solutions Ltd Co. Mayo 1.91.057 Single Fan Tom Monaghan monaghantk@eircom.net
Greenbuild Energy Rating & Building Info Co. Wexford 1.91.058 Single Fan Chris Moore christopherjmoore@eircom.net
Clean Energy Ireland Ltd Co. Cork 1.91.059 Single Fan Seán Costigan sean@cleanenergyireland.ie
HomeBond Technical Services Ltd Dublin 6 1.91.060 Single Fan Brendan McGourty bmcgourty@homebond.ie
National Energy Assessors Co. Mayo 1.91.062 Single Fan Damien Cowley damien.cawley@nea.ie
JMS Design Services Go. Galway 1.91.063 Single Fan Michael Sweeney jmsdesignservices@gmail.com
Hession Energy Go. Galway 1.91.064 Single Fan Wayne Hession hessionenergy@gmail.com
AirMatters Co. Kerry 1.91.065 Single Fan & Multi Fan Brendan Hehir info@airmatters.ie
Sugarloaf Building Maintenance Co. Wexford 1.91.066 Single Fan John Flynn sugarltd@eircom.net
2eva.ie Co Carlow 1.91.067 Single Fan Shane Davis info@2eva.ie
Nationwide Energy Consultants Co. Louth 1.91.069 Single Fan Roy O'Brien info@necber.ie
BK O' Reilly Consulting Engineers Ltd Co. Tipperary 1.91.070 Single Fan Kieran O'Reilly kieranjoreilly@gmail.com
Midland Energy Consultants Co. Longford 1.91.071 Single Fan Cian Brady cian.brady@mceng.ie
Evolved Energy Solutions Ltd Co. Kildare 1.91.072 Single Fan Peter Jedrychowski info@evolvedenergy.ie
John Brick Co. Kildare 1.91.073 Single Fan John Brick john3brick@gmail.com
Ken Curran Co. Kildare 1.91.075 Single Fan Ken Curann curran.ken@gmail.com
Glenair Dublin 2 1.91.076 Single Fan Michael J Cosgrave cosgravemichaeljohn@gmail.com
Clean Energy Ireland Ltd Co. Cork 1.91.077 Single Fan Jason Healy jason@passivesystems.ie
Energy First Services Ltd Co Armagh 1.91.078 Single Fan Brian Cunningham info@energyfirstservicesltd.ie
Atlantic Developments (NI) Ltd Co. Tyrone 1.91.079 Single Fan Gerry Mallon gerry@atlanticairtesting.com
Airtightness Ireland Ltd Co. Down 1.91.080 Single Fan Martin Smyth martin@airtightnessireland.co.uk
Philip Nickol
Prodomo Ireland
Co. Kerry 1.91.081 Single Fan Philip Nickol airtightness@prodomo-ireland.com
Nationwide Energy Consultants Co. Louth 1.91.082 Single Fan Ronan McNeany r.mcneanydesign@gmail.com
Bercerts.ie Co. Meath 1.91.083 Single Fan Daniel Fennell DanielF@BERcerts.ie
Bercerts.ie Co. Meath 1.91.084 Single Fan Raymond Kelly ray@bercerts.ie
Hession Energy Co. Galway 1.91.085 Single Fan Sean Ryan hessionenergy@gmail.com
Evolved Energy Solutions Ltd Co. Kildare 1.91.086 Single Fan Barry McCann barry@evolvedenergy.ie
Clean Energy Ireland Ltd Co. Cork 1.91.087 Single Fan Lukas Romanowski lukas@cleanenergyireland.ie
Energy First Services Ltd Co. Armagh 1.91.090 Single Fan Brian Plunkett Cunningham info@energyfirstservicesltd.ie

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 patricia.walsh@nsai.ie

  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%

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.