Air tightness testing will continue to be carried out during periods of lockdown. We will observe guidelines to ensure suitable PPE is worn and maintain social distancing on site.

Zephyr Air Testing

Zephyr Air Testing are independent air leakage testers consultancy located in County Down, Northern Ireland.


We Are registered with ATTMA to provide air testing for Part L1A (new dwellings) and Parts L2A and L2B (new buildings other than dwellings):

  • Houses and flats

  • Care homes, student accommodation

  • Industrial units, warehouses

  • Retails units


We are also qualified to carry out Passivhaus air leakage testing and offer consultations on low energy buildings as part of our service to clients.

Zephyr Air Testing covers the whole of Northern Ireland. We are happy to travel anywhere in the country to carry out air tightness test and offer a friendly, professional and cost effective service to out clients. Typically, we can carry out an air leakage test within one week. Our fees are competitive and we do not charge VAT. 

We are available 7 days a week from 8:00am - 8:00pm to answer any questions and take bookings by phone. Alternatively, please fill in the form on the contact page and we will get back to you as soon as we can.

Call us now to book your air leakage test.

Air Tightness Blower Door
Air Leakage Pressure Gauge and Fan

Get Your Air Leakage Test and Certification.

Competitive quotes - Enquire now!