This presentation will give an introduction to the approach of determining the required number of testing fans when conducting air tightness measurements of large buildings. From experience in testing practice and recording measurement results, we know that large buildings regularly achieve significantly better test results than...

The new Part 7 of the Thermal Insulation Standard DIN 4108 describes the permanent design of the airtight layer of heated or air-conditioned buildings. In the chapter on requirements, some terms have been redefined. However, the required values for the maximum air change rate are stipulated in the current EnEV...

The Association for Air Tightness in Buildings (FLiB e.V.) offers air tightness testing teams the possibility to check their testing performance as well as that of their equipment. Round-robin tests allow the participants to conduct independent air-tightness tests in a building organized by the association. The test, in accordance with...

Today, labels introduced in some countries to certify standardised low energy buildings, such as ‘Passive House’ in Germany and ‘Minenergie’ in Switzerland, are becoming increasingly applied in Europe.  Both labels explicitly require a threshold level of airtightness (0.6 air changes per hour (ACH) at 50 Pa). For timber frame...

The round-robin test of Czech airtightness providers was organised in order to obtain information about the measurement equipment generally used and in order to compare the test results given by different technicians operating with different devices. All the participants measured the same building under very similar conditions. The preparation...

The objective of the WTA* data sheet “Air tightness in existing buildings” is to support planners and contractors in modernizing and renovating buildings. Taking existing standards and regulations into account, the data sheet features the analysis of existing buildings, professional planning and implementation, as well as air tightness...

We ventilate buildings to provide acceptable indoor air quality (IAQ).

Capture efficiency (CE) of exhaust from a natural gas cooking range was quantified for three  common designs of residential range hoods in laboratory experiments: (A) microwave exhaust co