Figure 1. Calculated examples of minimum required airflow rates (l/s per m2 floor) applied to new apartments of different sizes, as described briefly in Table 1. The airflow rates have been determined solely with respect to indoor air quality, not comfort cooling. Details regarding the input data and the calculations are provided in NVG (2025a).
INNSIKT
Review of Ventilation regulations in the Nordic countries: Towards Harmonization
The Nordic Ventilation Group (NVG) has compiled information related to regulations for ventilation and indoor air quality as set by the authorities in the Nordic countries. At present, the regulations are quite diverse across these countries, and the intention of the NVG effort is to provide a basis for future harmonization.
This article was first published in REHVA Journal, issue 4/2025.
Background
There is a wide variety of different regulations and guidelines concerning indoor air quality and ventilation in the Nordic countries. Some are binding, some are general guidance. There are legislative regulations issued by various authorities, and there are guidelines issued by industry actors; all these have the potential to influence how ventilation is designed, commissioned, and operated.
A document prepared by the Nordic Ventilation Group [NVG, 2025a] shows that the guidance in the different Nordic countries is often structured differently. Typically, there are different authorities responsible for aspects related to the design of buildings, and to public and occupational safety and health, respectively. Within the same country, different authorities may provide diverging guidance.
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