Air Tightness Testing

Nationwide Energy Consultants provides professional Domestic BER Certification services

An air tightness test or blower door test is used to calculate the uncontrolled air permeability of a dwelling through the building fabric. This is done by placing a large fan at the front door of the house & creating a pressure difference of at least 50 Pascal’s to calculate the rate of permeability.

A house with a lower rate of air permeability will be cheaper to run, and if the rate of air permeability is too high, the house will cost more to run. If it’s a new build it could fail the air pressure test if it is too draughty and then the house will not comply with building regulations. If a house fails, the air tightness tester will be able to identify the problem on site so it can be rectified.

An air tightness test is required for all new dwellings under technical guidance document part L 2019 and they must achieve an air tightness target of lower than 5 ach/hr.

Nationwide Energy Consultants also offers a MULTI-FAN AIR TIGHTNESS TESTING service.

This is used when a building is too large for a single fan to test and multiple fans are combined to achieve sufficient fan capacity to carry out an NSAI certified multi-fan air tightness test. Multi-fan tests are usually carried out on commercial or industrial buildings such as schools, supermarkets, service stations, large retail stores etc.

Nationwide Energy Consultants employs two of the only five people in Ireland who are level two NSAI certified multi fan air tightness testers.

Why Choose Nationwide Energy Consultants for Air Tightness Testing

Independently Certified

As an independently certified testing company, we ensure a completely unbiased approach when it comes to your ventilation system testing service, ensuring transparency and reliability for each and every client.

Years of Industry Experience

Established over 10 years ago, Nationwide Energy Consultants has years of experience offering professional testing services to clients in all types of property. Our years of experience have made us a reliable, efficient, and cost-effective service that you can trust.

NSAI Regulated

Every member of our air testing team is regularly audited by NSAI to ensure our tests are consistently carried out to the regulatory requirements and to the highest standard. All air tightness tests are carried out to the EN ISO 9972:2015 test standard.

Here at Nationwide Energy Consultants, we carry out all air tightness testing in accordance with I.S. EN 9972:2015 to ensure a full-service, comprehensive air tightness test that will benefit your property.


Submit an inquiry for more information on our BER, Air Tightness, and Ventilation Services

Areas Covered

We pride ourselves in offering professional Ventilation and Air Tightness Testing Services across all of Louth and the surrounding areas, including:

  • Dublin

  • Drogheda

  • Ardee

  • Bettystown

  • Kells

  • Rathoath

  • Dunboyne

  • Kingscourt

  • Kildare

  • Dundalk

  • Dunleer

  • Laytown

  • Slane

  • Trim

  • Dunshaughlin

  • Carrickmacross

  • Wicklow

  • Carlingford

  • Navan

  • Athboy

  • Duleek

  • Summerhill

  • Ashbourne