English

Air and airborne contaminant mixing in building spaces is important to ventilation system design and performance, tracer gas measurements of ventilation rates, and occupant exposure to indoor pollutants. The physics of air and contaminant mixing have been studied for decades and are fairly well understood. Nevertheless, many discussions of building ventilation, air movement and indoor air quality use the term “perfect mixing” without a clear discussion of what it means or how it applies to the situation being considered.

This keynote presented the new government guidance on the health risks of damp and mould for the housing sector in England. This guidance highlights the serious risks that damp and mould can pose to tenants’ health, the legal responsibilities of social and private rented housing providers, the imperative to respond quickly, and the practical steps that should be taken both to address damp and mould and prevent them. Research led by UKHSA found that there was a considerable burden of respiratory illness in England from residential damp and mould.

Most people in Central Europe spend the majority of the day indoors. The quality of indoor air is therefore very important for health and well-being. Construction products can be an important source of indoor pollution through their emissions. The implementation of health requirements to assess emissions of volatile organic compounds (VOC) from construction products into indoor air under the Construction Products Regulation has been under discussion since 2010.

This keynote aimed to review the state of knowledge on indoor air quality in our main living spaces, including homes, daycare centers, schools, and offices, emphasizing the differences according to building types and occupancy. The health effects associated with exposure to various indoor pollutants were examined. Recent evolutions and future trends were presented.

A discussion on the political and economic challenges of renovating our building stock, as well as the opportunity that the Recast Energy Performance of Buildings Directive offers to building owners and occupiers as well as to industry.

AIVC's Ventilation Information Paper #48.2 summarizes current knowledge on trends in building ventilation requirements and inspection in France. 

AIVC's Ventilation Information Paper #45.13 summarizes current knowledge on trends in building and ductwork airtightness in Germany.

AIVC's Ventilation Information Paper #49 discusses resilient cooling of buildings, as defined by IEA EBC Annex 80.  The VIP paper examines 4 groups of resilient cooling strategies while assessing their resilience performance to heat waves and power outages.

AIVC's Ventilation Information Paper #48.1 summarizes current knowledge on trends in building ventilation requirements and inspection in Spain. More specifically, the paper aims to cover the following national trends:

• IAQ requirements and market,
• energy requirements and market,
• inspection of ventilation systems,
• innovative systems and market, and
• impact of the COVID-19 pandemic

This report documents all key performance indicators (KPI)s developed in the framework of Annex 80, relevant for the Annex 80 deliverables. Their application may be more precisely defined in the guidelines of specific task groups or Subtasks of Annex 80, e.g. in the simulation guideline or in the case study document.