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Both new and renovated existing buildings will in the future need to be optimized in such a way that can achieve to have nearly no energy use while still providing impeccable indoor climates. Since such buildings can already be assumed to be very well insulated, airtight, and to be equipped with heat recovery systems, one of the next focal points to limiting energy consumption for thermally conditioning the indoor environment will be to possibly reducing the ventilation rate, or to make it in a new way demand controlled.

This paper presents the initial reflections in the frame of Subtask 1 – Setting the Metrics of the IEA EBC Annex 68 – Indoor Air Quality Design and Control in Low Energy Residential Buildings. The first step of IEA Annex 68 aims at summarizing the current knowledge on target pollutants for residential buildings and at evaluating indoor air quality (IAQ), i.e. how to define indices that provide useful information allowing to achieve low risks for health in indoor spaces, and how to enable the comparison of solutions for achieving high IAQ taking into account energy efficiency.

AIVC's Ventilation Information Paper #44: Residential Cooker Hoods,  summarizes current knowledge on cooking contaminant emissions, its effects on IAQ, and identifies standards for assessing the efficacy of cooker hood (also known as a range hood) performance.

AIVC Technical Note 68 (TN 68) "Residential Ventilation and Health” is one of the outcomes of the work performed under the framework of AIVC’s project “Ventilation & Health” and benefited from contributions by several authors and many structured discussions held during specific sessions at AIVC events. TN 68 summarised studies that prioritise pollutants in the indoor environment and presented a

Worldwide, there is an increasing number of publications related to air cleaning and sales of gas phase air cleaning products. This puts a demand for verifying the influence of using air cleaning on indoor air quality, comfort, well-being and health. It is thus important to learn whether air cleaning can supplement ventilation with respect to improving air quality i.e. whether it can partly substitute the ventilation rates required by standards.

Building airtightness tests have become very common in several countries, either to comply with minimum requirements of regulations or programmes, or to justify input values in calculation methods. With more widespread use it has become increasingly important to understand and quantify the reliability of these tests.

The book of proceedings of the 11^th International BUILDAIR Symposium "Airtight Buildings, Thermography and Ventilation Systems in Practice",  held on May 24- 25  2019, in Hannover, Germany. Contains 25 abstracts.

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...

In October 2016, a research project was completed on the "Evaluation of faults in airtight layers recommended action for construction practitioners." Written by the Fachverband Luftdichtheit im Bauwesen e. V. (Association for Airtightness in the Building Industry), the Aachener Institut für Bauschadensforschung und angewandte Bauphysik gGmbH...

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...