Submitted by Maria.Kapsalaki on Thu, 01/28/2021 - 17:37
Purpose of the work
Many ventilation systems do not work efficiently, because their airflow rates have not been correctly adjusted and due to leakages of the ventilation ducts and individual elements.
Method of approach
Different measuring devices are used to evaluate and adjust the flow rates, to conduct airtightness tests with differential pressure measurements of ventilation systems or their parts, as well as to search for leakages of ventilation components.
Submitted by Maria.Kapsalaki on Thu, 01/28/2021 - 17:30
Purpose of the work
The overall buildings leakage results from the sum of the individual contribution of its components. Quantifying this contribution would be of major importance for building designers that intend to improve building enclosures for airtightness optimization. Typically, building components airtightness is tested in laboratory but several examples of a different in-situ performance are reported in the literature. Therefore, this work aims at assessing the air permeability of several building components using in-situ blower door tests.
Submitted by Maria.Kapsalaki on Thu, 01/28/2021 - 17:21
For several years, multifunctional tapes have increasingly been used for the airtight installation of windows in new buildings or renovation projects. The adhesive tapes are wrapped around the window on three or four sides. After the installation of the window, the tape expands and closes the joints between window and reveal. Their manufacturers sing the praises of these self-expanding joint-sealing tapes made of foam plastic. However, BlowerDoor tests frequently reveal faults. Accordingly, experts vary in their evaluation and discussion of the products.
Submitted by Maria.Kapsalaki on Thu, 01/28/2021 - 16:58
The information about uncertainly is essential to correct interpretation of any measurement. Therefore, several authors investigated the reproducibility and repeatability of airtightness measurement during the last years. The experiments were carried out in real buildings of different size and in actual climatic conditions which complicates the comparison of results. Namely, the question whether the uncertainly is proportional to the measured air flow rate remained unanswered.
Submitted by Maria.Kapsalaki on Thu, 01/28/2021 - 16:47
The purpose of the article is to introduce the condition of airtightness measurement market of large buildings in the Baltic states and in some European countries.
There are also considered national building norms of envelope airtightness and measured values.
Based on the measurement results of large buildings (more than 4,000 m3 volume according to ISO 9972-2015) the article assesses compliance of building norms of some countries with the actual building envelopes and the implementation of their controlling and stimulating functions.
Submitted by Maria.Kapsalaki on Thu, 01/28/2021 - 16:31
Purpose of the work
European standards or specific programmes rules describe ventilation airflow measurements at terminal devices according to different protocols. Experience shows that these protocols rarely address the assessment of uncertainties.
Submitted by Maria.Kapsalaki on Thu, 01/28/2021 - 16:23
Purpose of the work
Since 2008 in France, all measurement of building envelope airtightness performed according to the EP-regulations have to be performed by a certified operator. This certification includes a yearly follow-up we use to build up a highly detailed database which includes data of about 90,000 airtightness measurements.
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