Submitted by Maria.Kapsalaki on Tue, 01/27/2015 - 12:44
With the trend towards low-energy buildings, the importance and the interest for building air tightness is increasing. This implies an increasing number of tests, calling for increased attention to the quality of those tests including the way the test results are used to justify for programme or regulatory requirements. In turn, those tests put pressure on builders and craftsmen to reliably attain good airtightness levels. The project will review existing approaches and will analyse their pros and cons.
Submitted by Maria.Kapsalaki on Tue, 01/27/2015 - 12:23
There is no doubt that, as part of this tendency to move to nearly zero energy buildings, in most climates buildings have to become more airtight. Should there be specific airtightness requirements? If so, what level is to be required? Should there be a minimum level of air leakage? This is the context for this project regarding the ‘philosophy about airtightness requirements’.
Submitted by Maria.Kapsalaki on Tue, 01/27/2015 - 12:08
There are several national initiatives to collect air leakage data from field measurements buildings as a whole, building components, or ductwork systems. However, at this stage, there is no structured communication between these actions although they could mutually benefit from sharing their experience and encourage other similar initiatives in other countries having in mind the lessons learnt from the previous ones.
The handbook: "Building Thermography-including blower door and heat flux meter" approaches the technique both from a theoretical and practical point of view. It includes one chapter dedicated to the technical characteristics of thermal cameras and software, two chapters dedicated to blower door test and its synergy with thermography with an explanation of standards and case histories and a final chapter which treats heat flux meter and measuring of thermal transmittance in situ.
Around 150 participants attended the joint 35th AIVC –4th TightVent -2nd venticool conference held in Poznan, Poland September 24-25, 2014. The programme consisted of 3 parallel tracks with contributions from 27 countries and international organizations. Over 100 presentations were given covering topics including air infiltration through leaks in the building envelope and ductwork, ventilation in relation to IAQ and health, ventilative cooling and thermal comfort.
Submitted by Maria.Kapsalaki on Thu, 12/18/2014 - 14:42
This video is from the International Energy Agency (IEA) Annex-62 Ventilative Cooling Seminar held at Brunel University London on the 17th September 2014. The event was hosted in joint collaboration between Brunel University London, The RCUK National Centre for Sustainable Energy use in Food Chains (CSEF) and CIBSE Natural Ventilation Group
Submitted by Maria.Kapsalaki on Thu, 12/18/2014 - 14:40
Ventilative cooling is the use of natural or mechanical ventilation strategies to cool indoor spaces. It can significantly reduce the cooling energy demand in summer or mid-season conditions. Therefore, ventilative cooling is increasingly common in NZEBs.
This BUILD UP Web Seminar addresses:
Challenges for ventilative cooling in the context of NZEB - the venticool platform;
Potential energy savings and the new IEA EBC Annex 62 on ventilative cooling; and
Case studies - demonstrated high level summer comfort in real buildings.
Submitted by Maria.Kapsalaki on Thu, 12/18/2014 - 14:38
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 development of competent tester schemes to contain potential legal and competition issues.
The objective of this webinar was to give information on the status and trends in airtightness testing in the UK, Belgium,Germany, Czech Republic, France, Denmark, Ireland and Sweden including the details and feedback on competent tester schemes.
Submitted by Maria.Kapsalaki on Thu, 12/18/2014 - 14:36
While building airtightness is a key concern in Nearly Zero-Energy Buildings in most European climates, there exists already a wide range of commercially-available products specifically designed to minimise leakage in building envelopes.
The objective of this webinar was to give information on the performance and properties of these products based on research including laboratory and field tests. The speakers also provided information on standards already published and under development on this subject.
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