English

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.

Purpose of the work

To analyze the impact of different leakages in buildings by way of simulations.

Method of approach

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.

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.

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.

Method of approach

Purpose of the work

Involve constructors and administration in the importance of BlowerDoor Test in large buildings.

Method of approach

Airtightness measurement. Conducting a BlowerDoor Test according to EN13829.

Content of the contribution

Purpose of the work

Purpose of the work

Windows according to the Passive House Standard 2016 require a ten times more airtight airtightness class (EN 14351) [1] than around 1990. The installation layer of the windows is constantly moving closer into the area of the insulating layer with possibly moisture-sensitive materials. Therefore, joint sealing of construction and connection joints must also be evaluated by applying parameters related to building physics like thermal conductivity, diffusion behavior, heat and moisture storage capacity, and the capacity for movement absorption.

Purpose of the work

With the German Energy Savings Regulation EnEV 2014 the legislators have qualified the requirements for large apartment buildings (V_L > 1.500 m³). In addition to the air change rate (n₅₀ ≤ 3,0 h^-1 or n₅₀ ≤ 1,5 h^-1 depending on the ventilation technology used) the envelope-based air permeability (q₅₀ ≤ 2,5 m³h^-1m^-2) is now also required.

Purpose of the work

Presentation of the newly created standard VDI 2083/19 (VDI is the Association of German Engineers) for airtightness tests of clean rooms.

Content of the contribution

It has been ten years since the publication of a draft proposal, and now, many hundred measurements without a binding standard for such a sensitive area later, the day has finally come. We have a standard dealing exclusively with the airtightness of clean rooms.