16-17 May 2025, Hannover – “14th International BUILDAIR Symposium”

The 14th International Buildair Symposium: "Airtight Buildings, Thermography and Ventilation Systems in Practice" will take place on May 16 and 17, 2025 in Hanover, Germany. 

The event will offer a unique opportunity to find out about the latest developments and best practices, to highlight particular challenges in airtightness testing and to exchange experiences across national borders. 

The conference programme will include:

English

Thermography-based assessment of mean radiant temperature and occupancy in healthcare facilities

Due to its high demands regarding indoor environmental conditions, healthcare facilities are associated with high energy consumption. To move forward towards more demand driven and energy reduced conditioning, information on occupancy and temperature boundary conditions are crucial. Thermography-based systems enable data acquisition regarding both aspects in high local resolution. In this publication, we propose a thermography system that may be used for monitoring of rooms in healthcare facilities.

Airtight Buildings, Thermography and Ventilation Systems in Practice

The book of proceedings of the 13th International BUILDAIR Symposium "Airtight Buildings, Thermography and Ventilation Systems in Practice",  held on June 2-3  2023 in Hannover, Germany. Contains 36 abstracts.

Measuring airtightness of 100-meter high-rise buildings (lessons learned) – part 2

Worldwide, the demand for airtightness tests of tall buildings with a height of approximately 100 m is increasing. This report provides information on the planning and measurement concept for testing the entire building as a “single-zone” and presents the results and findings of the airtightness tests. The test set-up and the tests as such...

Messung der Luftdichtheit von Hochhäusern über 100 Meter (Projekterfahrungen) – Teil 2

Weltweit steigt die Nachfrage nach Luftdichtheitsprüfungen von hohen Gebäuden mit einer Höhe ab ca. 100 m. Dieser Bericht informiert über das Planungs- und Messkonzept zur Prüfung des gesamten Gebäudes als „Single-Zone“ und stellt die Ergebnisse und Erkenntnisse der Luftdichtheitsprüfungen vor. Der Prüfaufbau und die Prüfungen...

Zone measurements and their analysis as carried out in apartments

According to the two Swiss building standards Minergie-P and Minergie-A, individual dwelling units are considered measuring zones for airtightness, irrespective of whether they are in a new, renovated or modernized building. The Minergie standards focus on comfort between the dwelling units and the energy losses...

Auswertung von Zonenmessungen am Beispiel von Wohnungen

Für die beiden schweizerischen Energiestandards Minergie-P und Minergie-A werden bei der Luftdichtheit die einzelnen Nutzeinheiten als Messzonen betrachtet, egal ob Neubau oder Erneuerung / Modernisierung. Im Vordergrund steht der Komfort zwischen den Nutzungseinheiten nebst den energetischen Verlusten durch Infiltration...

Pressurization time for measuring very airtight buildings and buildings with flexible airtight layers

When dealing with very airtight buildings and buildings with flexible airtight roofing felts it might take several minutes for the differential pressure and air flow to level out after having changed the fan speed. Taking premature readings of the values causes measuring errors. The lecture provides pointers for test teams to avoid such measuring...

Dauer des Druckaufbaus bei der Messung sehr dichter Gebäude und von Gebäuden mit flexiblen Luftdichtheitsschichten

Bei sehr dichten Gebäuden und bei Gebäuden mit flexiblen Luftdichtheitsschichten kann es nach dem Verstellen des Ventilators Minuten dauern, bis sich der Differenzdruck und der Volumenstrom praktisch nicht mehr ändern. Zu frühzeitiges Ablesen der Werte führt zu Messfehlern. Der Vortrag gibt Handlungsempfehlungen...

Air pressure measurements at a particularly airtight and unusual building: "Concrete shell for CO2 storage in recycled concrete aggregates"

I would like to report on lessons learned in the field regarding two measurements at a special, particularly airtight and unusual building: A "concrete shell for CO2 storage in recycled concrete aggregates". Not only the building and its use for the permanent storage of CO2 in demolition concrete was unusual, but also measuring the building...

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