English

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.

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 are based on the Passive House Institute's Guide to Measuring Tall Buildings [5] which includes recommendations that go beyond the ISO 9972 standard.

Purpose of the work 
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 caused by infiltration. 
Do zone measurements meet relevant requirements? Which requirements do the zone measurements fail to meet?

Purpose of the work 
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 errors. 

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". 

Purpose of the work 

Purpose of the work 

Nowadays, it is unquestionable the fact that building airtightness impacts the energy and ventilation performance of buildings. However, in Mediterranean countries like Spain, air infiltration has traditionally been considered a source of ventilation, which complemented natural ventilation and window airing provided by the occupants. The improvement of energy efficiency and implementation of mechanical ventilation systems led to the introduction of whole-building airtightness requirements in 2019.

When testing large buildings, it is possible to calibrate the flow of ventilation fans with the Minneapolis system. The test is run and checked with the pressure sensors in the Minneapolis system and the fans used for calibration can easily be run together with flow from the ventilation fan. 

By using this method, a 400,000 cubic foot building was tested with only 9 Minneapolis fans. 

For further information please contact Lars Due at: info@isolink.dk

Purpose of the work