Passive window ventilation openings in every-day use

In Switzerland, 70 % of building refurbishments are realised in stages. When only a window replacement is done, the new airtight windows can lead to a reduced infiltration air exchange and subsequently there may be moisture issues, e.g. mould. The integration of passive window ventilation openings (PWVO) with additional exhaust fans in the kitchen and bathroom(s) can ensure a user-independent basic air change rate. PWVO can be defined as small air inlets integrated in or near the window frame.

Ambient air filter efficiency in airtight, highly energy efficient dwellings – A simulation study to evaluate benefits and associated energy costs

Highly energy efficient buildings such as ones built to the Passive House standard, require a very airtight building envelope and the installation of a mechanical ventilation with heat recovery (MVHR). MVHR systems incorporate ambient air filters, which reduce the introduction of particulate matter (PM) from outdoor sources into the dwelling. However, indoor PM sources, e.g. cooking, can also contribute substantially to occupants’ exposure and need to be accounted for when designing ventilation or deriving recommendations for filter classes. 

Evaluation potential of indoor environments' ecological valency

Buildings typically are expected to provide their inhabitants with the opportunity to influence the indoor environment using various control devices. These include, for example, windows, luminaires, radiators, and shading elements. The quality and adequacy of the indoor environment is thus dependent on the availability and effectiveness of such devices. There is arguably a lack of generally agreed-upon evaluation procedures for this aspect of buildings' indoor environment, namely its controllability by building users, or – in the terminology of Human Ecology – its "ecological valency".

27 April 2018 - IEA-EBC Annex Definition Workshop

A proposal for the formation of a new IEA EBC Annex on the topic of Resilient Cooling was presented to the Executive Committee (ExCo) of the International Energy Agency’s Energy in Buildings and Communities programme (IEA EBC) in November 2018. The Annex Concept has been further developed towards a draft Annex Text which will be proposed to the ExCo at its next meeting at Stockholm in June 2018.

English

27 April 2018, Workshop, Vienna - IEA-EBC Annex Definition Workshop on 'Resilient Cooling for Residential and Small Office Buildings'

A proposal for the formation of a new IEA EBC Annex on the topic of Resilient Cooling was presented to the Executive Committee (ExCo) of the International Energy Agency’s Energy in Buildings and Communities programme (IEA EBC) in November 2018.

The ExCo welcomed the idea in general and started the Annex definition phase.

According to the Annex Development and Quality Assurance Process the Annex Concept now is further developed towards a draft Annex Text which will be proposed to the ExCo at its next meeting at Stockholm in June 2018.

English

Ventilative Cooling on the test bench - Learnings and conclusions from practical design and performance evaluation

Based on 3 short time performance measurements, 4 visits together with user-interviews, 3 involvements in Ventilative Cooling (VC)-building-design, 2 long-term case studies and 11 expert interviews the paper presents a list of key performance-indicators of successful Ventilative-Cooling solutions as well as challenges together with examples of their successful overcoming.

Information has been collected from projects located in Austria, using Ventilative Cooling, both natural and mechanical ventilation, in both residential and office buildings, mainly in urban surroundings.

Development and measurement results of a compact Counterflow Heat Recovery Fan for single/double room ventilation

With the combination of two fans and a heat exchanger in one single component there is the possibility to design a compact and highly efficient ventilation system especially for use in building modernization. One crossflow fan generates both airflows (outdoor/supply and extract/exhaust air) and simultaneously acts as counterflow heat exchanger. The space between the fan blades is filled with elements which operate as regenerative heat exchanger. The modified laboratory prototype of the so called Counterflow Heat Recovery Fan was optimized for the use as single/double room unit.

AIVC Countries

At present, there are 17 AIVC member countries which are listed below. Click here if you want to know who are the country representatives in the AIVC board.

In case you would like to obtain information about AIVC membership, please click here.