EN 13779

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European Standard EN 13779
National standards DIN standard , ÖNORM
Area Ventilation technology
Regulates Ventilation of non-residential buildings - General principles and requirements for ventilation, air conditioning and room cooling systems
Brief description Air quality
Latest edition 2007-09

The EN 13779 was until November 2017 European standard for mechanical ventilation and air conditioning of non-residential buildings intended for human occupancy. In Germany, the standard replaced DIN 1946-2, which was withdrawn in May 2005. In Austria it replaces the previous version, which was valid from the year 2000. In November 2017, DIN EN 13779 was withdrawn and replaced by DIN EN 16798-3 Energy assessment of buildings - Ventilation of buildings - Part 3: Ventilation of non-residential buildings - Performance requirements for ventilation and air conditioning systems and room cooling systems (modules M5-1, M5-4 )replaced. As a result, DIN SPEC 13779, which was published in December 2009 as a national appendix to DIN EN 13779 in Germany, also lost its validity.

Because the quality requirements to be taken into account, which were placed on the central device technology as well as on the entire ventilation system with all air ducts, etc., ran like a red thread from design to planning to scheduled maintenance through the European standard, they applied to the design of air conditioning systems throughout the entire life cycle as an important guideline. The standard classified the air quality of the indoor air, the supply air, the exhaust air and the outside air into two to five classes depending on various criteria. Determining the air quality data is important when constructing non-residential buildings . Based on EN ISO 7730 Ergonomics of the thermal environment - analytical determination and interpretation of thermal comfort by calculating the PMV and PPD index and criteria of local thermal comfort , areas for the interpretation of the room temperature and permissible sound pressure level were defined.

A distinction is made between ODA ("Outdoor Air") and IDA ("Indoor Air"). Three categories are defined for the OAD:

  • ODA 1: clean air that is only allowed to be contaminated with dust at times
  • ODA 2: Outside air with a high concentration of dust or fine dust and / or gaseous impurities
  • ODA 3: Outside air with a very high concentration of dust or fine dust and / or gaseous impurities

The determination of the actual ODA value applicable to the building site requires the collection of pollutants in the outside air. This is followed by a complex calculation to determine the concentration of:

The IDA value relates to the desired indoor air quality and was also regulated by EN 13779.

  • IDA 1: high indoor air quality
  • IDA 2: Medium indoor air quality
  • IDA 3: Moderate indoor air quality
  • IDA 4: Low indoor air quality

Scientific background and practical application

In practice, EN 13779 was directly applied in the planning of air conditioning systems (RLT systems). Since, depending on the location, the pollutant concentration is not the same everywhere, the standard stated that the specialist planner must include the ODA value in every property planning. For this purpose, the air measurement data were taken into account retrospectively over a period of one year and evaluated on the basis of the WHO limit values .

The Rhenish Institute for Environmental Research at the University of Cologne , together with the service provider Pollution-Info, developed a database that should enable the specialist planner for air conditioning technology to easily query an ODA value for an exact building location. Since 2011, this service has been so mature that the outside air can be calculated from around 3.1 billion data records. The tolerance here is around 25 meters.

Web links

Wiktionary: outside air  - explanations of meanings, word origins, synonyms, translations

- Odoor Air (ODA)

Wiktionary: Indoor air  - explanations of meanings, word origins, synonyms, translations

- Indoor Air (IDA)

Individual evidence

  1. DIN EN 13779: 2007-09. beuth.de, accessed on May 25, 2020 .
  2. DIN EN 16798-3: 2017-11. beuth.de, accessed on May 25, 2020 .
  3. Clean air determines the planning goal. In: IKZ-HAUSTECHNIK, edition 08/2005, page 60 ff. Accessed on May 25, 2020 .