airtightness

Are you interested in building and ductwork air tightness? Please meat us in Copenhagen October 2010.

We will have a scientific and research program on the first day and a very practical program on the second day. What would be your interests, ideas?

Please post your ideas in this blog to give us input for the conference.

For more information look: www.buildair.de



Call for papers for the 5th International BUILDAIR-Symposium ”Building and Ductwork Air-tightness“ on October 21-22 2010, Copenhagen, Denmark

The 5th International BUILDAIR-Symposium ”Building and Ductwork Air-tightness“ takes place on October 21-22 2010 at the Danish Technical University in Copenhagen/Lyngby, Denmark.

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The Symposium this year combines contributions from sciences and research with very practical oriented application knowledge and an intensive exchange between the participants.

Event

Webinar: Airtightness testing: status and trends in competent tester schemes in Germany, the Czech Republic and France

Over the past few years, there has been an increasing number of airtightness tests performed in Europe either for specific high performance buildings programmes or for a wide range of buildings in regulatory contexts. This has led to the...
Event

Webinar: Airtightness testing: status and trends in competent tester schemes in the UK, Denmark and Belgium

Over the past few years, there has been an increasing number of airtightness tests performed in Europe either for specific high performance buildings programmes or for a wide range of buildings in regulatory contexts. This has led to the...
Publication

Inspection par les artisans de l'enveloppe du bâtiment à l'aide de caméras thermographie infrarouge

This report from the French Program RAGE 2012 gives the results of a study operated by CDPEA about the use of infrared thermography by building contractors in order to assess the quality of their own work.
News

BUILD UP Web Seminar video recordings | Building and ductwork airtightness: Legislative drivers, new concerns and new approaches

The implementation of the EPBD recast puts increasing pressure on the market to achieve better building and ductwork airtightness: for most European climates and countries, good airtightness levels are necessary to achieve nearly zero-...
News

International workshop on quality of ventilation and air infiltration measurements

Workshop-Quality of Methods for Measuring Ventilation and Air Infiltration in Buildings-March,18-19, 2014 There is a trend to perform more ventilation and air infiltration measurements in buildings, either to strengthen...
Event

Quality of Methods for Measuring Ventilation and Air Infiltration in Buildings

There is a trend to perform more ventilation and air infiltration measurements in buildings, either to strengthen commissioning procedures or to learn from field data. This trend is stronger in nearly zero-energy buildings projects or...
News

Building Airtightness Solutions webinar

Building Airtightness Solutions: System approach and characterization of air barrier and moisture management systemsWhile building airtightness is a key concern in Nearly Zero-Energy Buildings in most European climates,...
Publication

Overview of the European sealants market

This press release from IAL Consultants (UK) announces the publication of a new report: Overview of the European Sealants Market. The press release provides some information about the market of sealants (silicones, polyurethanes...

Will airtightness measurements be mandatory in 2020?

The recast of the EPBD imposes that all EU member states impose near-zero energy targets for new buildings. In practice, it will require that the building airtightness level has to be assessed. one can imagine several ways to assess the airtightness, e.g. the measurement of each building, the measurement of a reference building, standard building details, ....  Many people expect that indeed each building have to be measured, whereby in addition a good airtightness level has to be reached.  What is your opinion? 

Is it true to say that round ventilation ducts with a single gasket generally achieve airtightness Class C?

Although this seems to be true, this is a dangerous generalization. There are many factors that govern airtighness of round ductwork, including roundness (any slight ovality can cause leakage at the joints) and the flatness of the seams at the joints between two ducts (protuding or convex seams can cause point leakages at the joint irrespective of the gasket type).
Is it true to say that round ventilation ducts with a single gasket generally achieve airtightness Class C?

Is it possible to use the HVAC fan itself to measure the airtightness of the ductwork in a ventilation system?

This is generally not possible. In systems with good airtightness, the leakage flow rates are too small for one to be able to accurately measure the flow rate over the fan.

For more information you can check-out the Webevent presentation “Duct System Leakage Testing — Methods, requirements, handing over” by P.G.Schild, available on the website www.asiepi.eu


Is it possible to use the HVAC fan itself to measure the airtightness of the ductwork in a ventilation system?