Oliver Solcher
Bibliographic info:
11th International BUILDAIR Symposium, 24- 25 May 2019, Hannover, Germany

Purpose of the work

Is a ventilation system mandatory in airtight buildings? To what extent can users still be responsible for ventilation in modern buildings?

Method of approach

Evaluation of decision-making criteria for ventilation; normative specifications for the ventilation concept; energy efficiency potential of ventilation

Content of the contribution

New and modernized buildings must have ventilation systems – that’s the widely held view. But is it true? What is the energy efficiency potential of a residential ventilation system – and what is the motivation for providing ventilation systems? The DIN 1946-6 standard for the ventilation of residential buildings allows for outdoor air intake via leaks. What are the associated risks? What does a user-independent ventilation system need to do? What can be expected of users in terms of manually opening windows? What does the ventilation concept look like?

Results and assessment of their significance

In new and modernized residential buildings, building protection must be guaranteed independently of users. The decision of whether user-independent ventilation should cover hygienic aspects depends on the users and the building conditions.


In residential buildings, window ventilation can normally be implemented by users as an additional ventilation measure in order to take into account hygienic aspects or summer heat protection. For building protection, however, a ventilation system that operates independently of users must be provided.


For more information, please contact the reference author at: solcher@flib.de