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Session Overview
Seminar 331: Ventilation and IAQ criteria in EN 16798-1 revision
Wednesday, 23/June/2021:
10:30am - 12:00pm

Session Chair: Jarek Kurnitski
Session Co-chair: Pawel Wargocki
Location: Zoom room #4
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Session Abstract

SPEAKERS: Bjarne Olesen, Jarek Kurnitski, Peter G. Schild, Pawel Wargocki

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Ventilation and IAQ criteria in EN 16798-1 revision

Jarek Kurnitski1, Bjarne W. Olesen2, Pawel Wargocki2

1Tallinn University of Technology, Estonia; 2Technical University of Denmark


Researchers, HVAC professionals and consultants, building authorities


EN 16798-1 serves as a major indoor climate standard with the aim to specify main design criteria for buildings with human occupancy. This workshop is limited to IAQ and ventilation, other areas of indoor climate are not discussed. In the current standard, IAQ is mainly dealt through perceived air quality that leads to ventilation sizing criteria in non-residential and residential buildings. In addition, health-based ventilation criteria is provided based on WHO listed pollutants. Revision of the standard provides a good opportunity to include and develop another evidence-based criteria being based on health effects, productivity and learning performance, sick leaves and infection risk.

The objective of the workshop is to discuss new ventilation criteria and propose directions how to develop input to the revision of the standard. The following questions will be discussed:

• That is the state of health-based ventilation criteria including non-specific pollutants, CO2 and evidence from epidemiological studies? It has been generally seen that the lack of health-based ventilation criteria has been a barrier for authorities to set more demanding ventilation requirements in many countries.

• Productivity in office work and learning performance in schools has been widely studied. Could these results be utilised as one criterion for Category II and I ventilation rates?

• COVID-19 pandemic has brought out the importance of the infection risk control in indoor spaces. The phenomena is not new because there is good previous evidence and knowledge on sick leaves (common cold) and influenza. As any airborne virus can be described by emission rates, the question is, should ventilation criteria include ventilation sizing to some predefined infection risk probability.


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