The project in short

The purpose of this project is to compare Nordic ventilation regulations and guidelines and identify the opportunities for improving the uniformity of the guidelines, for better indoor environmental quality and energy efficiency. The purpose is also to establish a Nordic platform for sharing knowledge and discussing actual issues. The project will run until end of 2021.


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Properly operating ventilation of buildings is important for human wellbeing and energy efficiency. Cost of the poor indoor air quality may be billions of euros per year to the society. These costs can be reduced if ventilation operates properly. Energy efficient ventilation is important, as the energy use of ventilation can be up to 10% of the total primary energy use.

The Nordic countries have been leading in construction of buildings with high indoor environmental quality. This knowledge must be kept up dated with increasing demands of the society. The building regulations in Nordic counties give the basic, minimum requirements for ventilation. But building codes are not enough for practical design and construction work. Each Nordic country has its own guidelines and code of practice. These differences cause need for adjustment in products and building design, which may cause problems for companies in the common Nordic market. As the cultural background and building construction are alike in Nordic counties the harmonization of ventilation guidelines could be beneficial. At least it would be beneficial to learn the background of ventilation practice in each country.

Each country has, in addition to building codes, lower level guidelines and standards. The purpose of this project is to compare the design and construction guidelines of ventilation in Nordic counties and investigate the opportunities to harmonize these guidelines for the benefit of all participating countries.The strong Nordic consensus regarding the ventilation technology would be also beneficial for strengthening Nordic position as the leader of know -how and technology for good environmental, energy efficient built environment.

The project will include the comparison of ventilation rates but not limit to those. Many technical questions are also extremely important, like control of air flows by demand (by the use of the space), control of pressure difference in buildings, need for ventilation during unoccupied hours, cleanliness of ventilation systems, heat recovery, use of return air etc.
Previous work in the area of ventilation has shown large variety in the regulations. This has been reported in several projects, like


The aim of the project is to compare ventilation guidelines in the Nordic countries, in terms of ventilation sizing and technical implementation, taking into account energy efficiency and health aspects, and to propose further measures to develop the guidelines based on the interests and problems raised by different Nordic countries. In addition, Nordic co-operation on ventilation is planned and launched, and an organization for co-operation is created.

The contents of the project

The project included the following steps

  • Identification of a Nordic co-operation network in the fields of research, industry, consulting, trade and public authorities
  • Collection of guidelines for the control of the corona virus and thus identification of active parties
  • Initiating collaboration using network connections, starting with academic partners
  • Expanding the cooperation network by setting up co-operation groups for the public sector and industry, not forgetting consultants
  • Collection and analysis of previously collected data
  • Collection, comparison, and analysis of Nordic ventilation guidelines
  • Identification and analysis of problem areas in the implementation of ventilation
  • Describing good and bad solutions
  • Establishment of Nordic working groups and setting goals for them
  • Preparation of the webinar, webinars / seminars for presenting the results of the project and proposal for the Nordic continuation of the project
  • Analysis of Finnish authorities’ regulations and other ventilation guidelines based on Nordic practice
  • Preparation of a report, summarizing the results of the project and proposals for further action

One of the models to be evaluated for organizing co-operation is the Nordic arrangement, which has been operating successfully since 1995 in the Water and Sewerage sector.

Partners of the project

The project is coordinated in Finland by VVS Föreningen i Finland rf (VSF) with support from Jamira Oy, Finnish Society of Indoor Air Quality and Climate (SIY), Finnish Building Services Industries and Trade (Talteka) and The HVAC Association of Finland (SuLVI).

The project is initiated and funded by the Ministry of the Environment in Finland.

Project group

Olli Seppänen, FINVAC/Jamira
Juhani Hyvärinen, Talteka
Mervi Ahola, SIY
Tryggve Leander, VSF
Siru Lönnqvist, VSF
Samuli Könkö, SuLVI
Risto Kosonen, SCANVAC

In co-operation with

  • Nordic universities
  • Nordic authorities
  • Industry and business

Interested in following the project?

The project will organize during 2021 webinar(s) to inform stakeholders on the objectives and results of the project.

If you are interested in following the project, please send your contact information to Siru Lönnqvist.

Contact information

Siru Lönnqvist

+358 50 512 4369