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§ 19 Ventilation and indoor climate

The ventilation in indoor and outdoor areas shall cover the need for air change and provide acceptable air quality. The ventilation shall also be designed so that smoke from fires can be controlled, and so that hazardous and combustible gases cannot penetrate closed non-rated areas.
The indoor climate shall be adapted to the individual room as regards air needs, circulation, humidity and temperature. The indoor air shall be free of hazardous pollution.
Section last changed: 01 January 2011

To fulfil the requirement for ventilation as mentioned in the first subsection, the NS A ISO 15138 standard together with the IEC 60079-10-1 and IEC 60079-13 standards should be used, with the following addition: when determining the need for air exchange, the danger of accumulation of hazardous and flammable gas and the need for weather protection should all be taken into account, cf. Section 24 of these regulations.
The requirements for indoor climate as mentioned in the second subsection, apply to indoor work areas.
The requirements entail that consideration is taken for the fact that the air quality is influenced by building materials and fixtures, personnel, activities and processes, cleaning and maintenance. In order to fulfil these requirements, the following should be used:
  1. the Norwegian Labour Inspection Authority's guidelines regarding climate and air quality at work and
  2. the National Institute for Public Health – recommended technical standards for indoor climate.
Requirements for ventilation and indoor climate shall be seen in the context of Section 20.