In short. Qualibat 8711 covers building envelope air-permeability measurements, while 8721 covers ventilation duct networks.
Definition: As of 17 October 2026, Qualibat qualification 8711 covers setting up a measurement system and measuring the air permeability of building envelopes. Air permeability describes uncontrolled air passing through leaks in the envelope, measured as a leakage flow under a given pressure difference.
Key facts
- Qualibat's technical documentation identifies 8711 for building envelopes and 8721 for ventilation duct networks.
- The 8711 qualification reference includes preparing the building, detecting envelope leaks and communicating measurement results to the client.
- The ministry's operator recognition guidance assigns the qualification to the company and ministerial authorisation to the individual tester.
What measurements does 8711 cover?
Qualibat's 8711 reference applies to commercial entities carrying out measurements for a third party. Its scope includes preparing a building for testing, installing the measurement system, locating air leaks through the envelope and measuring its air permeability. Preparation includes treating openings and particular points in the building.
The qualified company must communicate the results to its client. Its qualification applies to a specified list of measurement operators. Qualibat's documentation page gives ventilation duct air-permeability measurement its own code, 8721.
The searchable qualification identifier for the building envelope service is:
8711
Which measurement method applies?
The ministry's building air-tightness guidance defines air permeability through the leakage flow crossing the envelope at a given pressure difference. The measurement therefore concerns uncontrolled airflow through the building envelope.
The ministry's recognition procedure states that assessment for 8711 rests on NF EN ISO 9972 and its French application guide FD P50-784, together with the portal's technical FAQ. It names FD E51-767 as the reference for qualification 8721. These are separate assessment references for envelope and ventilation duct measurements.
How can a company and its tester be checked?
The ministry's recognition page publishes separate downloadable lists of authorised operators for 8711 and 8721. It updates these lists after each commission meeting. Its stated conditions include building competence, recognised training and annual follow-up of the company's qualification.
For regulatory measurements, the same guidance requires the operator's company to be legally independent of the project's constructor and organisations involved in execution, design supervision or project ownership. Its examples include the project's thermal engineering consultancy, architect and construction contractors.
Qualibat's 8711 reference provides for a company certificate covering a specified list of operators. The certificate is valid for one year.
Related terms
- What do the work codes on a contractor's Qualibat certificate identify?
- Which qualification covers air-leakage testing of ventilation ducts?
- What does Qualibat's exterior-window supply and fitting certification cover?
FAQ
Does a company's qualification also identify the authorised tester?
Qualibat's 8711 reference ties the company's qualification to a specified list of measurement operators. You can check the operator against the ministry's published authorisation list.
Which code should I search for when the service concerns ventilation ducts?
You can search for 8721. Qualibat's technical documentation assigns that code to setting up a measurement system and measuring the air permeability of ventilation duct networks.
Sources
- Qualibat, "Documentation et référentiels techniques QUALIBAT", undated
- Qualibat, "Référentiel pour l'attribution et le suivi de la qualification professionnelle de Mesurage 8711", January 2024
- RT-RE bâtiment, "Reconnaissance des mesureurs de perméabilité à l’air", updated 16 October 2026
- RT-RE bâtiment, "L’étanchéité à l’air des bâtiments", updated 1 July 2026
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