The 41st AIVC – ASHRAE IAQ joint Conference, co-organized by ASHRAE & AIVC, was held on 4-6 May 2022 in Athens. The event drew around 185 participants (in person and remotely) – academic researchers, engineering and consulting firms, industry representatives, people involved in standardisation, policy makers, manufacturers & stakeholders and international organizations.
During the event, two topical sessions dedicated to building and ductwork airtightness were organized.
Submitted by Maria.Kapsalaki on Mon, 04/05/2021 - 15:54
The 12th International BUILDAIR Symposium will take place on June 25 and 26, 2021 – as a bilingual online conference, in view of the corona situation. The meeting again offers an ambitious programme. Among other things, the presentations will deal with measuring techniques, gluing and sealing difficult details, minimizing the air permeability of materials, quality assurance for very technology-intensive objects and measuring technology for very tall buildings.
Submitted by Maria.Kapsalaki on Fri, 01/29/2021 - 18:33
It is now internationally accepted by the disciplines of structural engineering and building physics that in the interests of energy efficiency heated buildings should be equipped with airtight building envelopes. The airtightness of the building envelope as a fundamental construction objective is therefore no longer in question. But it is...
Submitted by Maria.Kapsalaki on Fri, 01/29/2021 - 18:26
If there are leaks in an airtight layer which cannot be accessed any longer, the question arises as to whether the structure is still fit for purpose, or in more pragmatic terms: "Can rework be avoided?" Rework is always extremely resource intensive, so it must be specifically required. “Moisture safety” - which is purely a matter of building physics...
Submitted by Maria.Kapsalaki on Fri, 01/29/2021 - 18:20
All too often, we experts and measurement technicians are totally fixated on airtightness issues. Based on three practical cases, I would like to demonstrate that windproofness, minimal convection in the insulation layer, and the convective separation of different structural elements from one another should also be taken into account...
Submitted by Maria.Kapsalaki on Fri, 01/29/2021 - 18:16
In recent years, the level of prefabrication in timber construction has increased many times over. Although breaking down wall sections into prefabricated elements presents few problems at certain interfaces as long as this work and subsequent installation are done with care, unfortunately this is not yet the case for the roof elements. This paper...
Submitted by Maria.Kapsalaki on Fri, 01/29/2021 - 18:04
Airtightness is mandatory, which also makes ventilation concepts mandatory. Today, the construction/renovation of a building without a ventilation system is impractical in terms of energy efficiency. The minimum air change rate and moisture protection must also be taken into account. Unfortunately, in many buildings...
Submitted by Maria.Kapsalaki on Fri, 01/29/2021 - 16:50
Even though air leakage assessment is key towards a better energy performance of buildings, Spain has still not established limitations regarding airtightness. National building regulations in Spain are gathered in the National Building Code (CTE), which was first released in 2006 and updated several times so far. Airtightness should be...
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