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BS EN 15242:2007

Superseded

Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Ventilation for buildings. Calculation methods for the determination of air flow rates in buildings including infiltration

Available format(s)

Hardcopy , PDF

Superseded date

31-07-2017

Language(s)

English

Published date

31-07-2008

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviations
5 General approach
6 Instantaneous calculation (iterative method)
  6.1 Basis of the calculation method
  6.2 Mechanical air flow calculation
  6.3 Passive and hybrid duct ventilation
  6.4 Combustion air flows
  6.5 Air flow due to windows opening
  6.6 Exfiltration and infiltration using iterative
      method
  6.7 Exflitration and infiltration calculation using
      direct method
7 Applications
  7.1 General
  7.2 Energy
  7.3 Heating load
  7.4 Cooling loads
  7.5 Summer comfort
  7.6 Indoor air quality
Annex A (normative) - Data on wind pressure coefficients
Annex B (normative) - Leakages characteristics
Annex C (normative) - Calculation of recirculation coefficient
                      C[rec]
Annex D (normative) - Conversion formulas
Annex E (informative) - Examples of fuel flow factor for
                        residential buildings
Bibliography

Specifies the method to calculate the ventilation air flow rates for buildings to be used for applications such as energy calculations, heat and cooling load calculation, summer comfort and indoor air quality evaluation.

This European Standard describes the method to calculate the ventilation air flow rates for buildings to be used for applications such as energy calculations, heat and cooling load calculation, summer comfort and indoor air quality evaluation. The ventilation and air tightness requirements (as IAQ, heating and cooling, safety, fire protection…) are not part of the standard. For these different applications, the same iterative method is used but the input parameter should be selected according to the field of application. For specific applications a direct calculation is also defined in this standard. A simplified approach is also allowed at national level following prescribed rules of implementation. The method is meant to be applied to: - Mechanically ventilated building (mechanical exhaust, mechanical supply or balanced system). - Passive ducts. - Hybrid system switching between mechanical and natural modes. - Windows opening by manual operation for airing or summer comfort issues. Automatic windows (or openings) are not directly considered here. Industry process ventilation is out of the scope. Kitchens where cooking is for immediate use are part of the standards (including restaurants..) Other kitchens are not part of the standard. The standard is not directly applicable for buildings higher than 100 m and rooms where vertical air temperature difference is higher than 15K. The results provided by the standard are the building envelope flows either through leakages or purpose provided openings and the air flows due to the ventilation system, taking into account the product and system characteristics.

Committee
RHE/2
DevelopmentNote
Supersedes 05/30128642 DC. (07/2008)
DocumentType
Standard
Pages
56
PublisherName
British Standards Institution
Status
Superseded
SupersededBy
Supersedes

Standards Relationship
EN 15242:2007 Identical

EN 14239:2004 Ventilation for buildings - Ductwork - Measurement of ductwork surface area
EN ISO 13792:2012 Thermal performance of buildings - Calculation of internal temperatures of a room in summer without mechanical cooling - Simplified methods (ISO 13792:2012)
EN 1886:2007 Ventilation for buildings - Air handling units - Mechanical performance
EN ISO 15927-1:2003 Hygrothermal performance of buildings - Calculation and presentation of climatic data - Part 1: Monthly means of single meteorological elements (ISO 15927-1:2003)
EN 15251:2007 Indoor environmental input parameters for design and assessment of energy performance of buildings addressing indoor air quality, thermal environment, lighting and acoustics
EN 1507:2006 Ventilation for buildings - Sheet metal air ducts with rectangular section - Requirements for strength and leakage
ISO 13792:2012 Thermal performance of buildings Calculation of internal temperatures of a room in summer without mechanical cooling Simplified methods
EN 13053:2006+A1:2011 Ventilation for buildings - Air handling units - Rating and performance for units, components and sections
EN 12792:2003 Ventilation for buildings - Symbols, terminology and graphical symbols
CR 14378:2002/AC:2002 VENTILATION FOR BUILDINGS - EXPERIMENTAL DETERMINATION OF MECHANICAL ENERGY LOSS COEFFICIENTS OF AIR HANDLING COMPONENTS
EN 12237:2003 Ventilation for buildings - Ductwork - Strength and leakage of circular sheet metal ducts
ISO 15927-1:2003 Hygrothermal performance of buildings Calculation and presentation of climatic data Part 1: Monthly means of single meteorological elements
EN 13141-5:2004 Ventilation for buildings - Performance testing of components/products for residential ventilation - Part 5: Cowls and roof outlet terminal devices
EN 13141-2:2010 Ventilation for buildings - Performance testing of components/products for residential ventilation - Part 2: Exhaust and supply air terminal devices
EN 13141-1:2004 Ventilation for buildings - Performance testing of components/products for residential ventilation - Part 1: Externally and internally mounted air transfer devices
EN ISO 13791:2012 Thermal performance of buildings - Calculation of internal temperatures of a room in summer without mechanical cooling - General criteria and validation procedures (ISO 13791:2012)
CEN/TR 1749:2014 European scheme for the classification of gas appliances according to the method of evacuation of the combustion products (types)
ISO 13791:2012 Thermal performance of buildings Calculation of internal temperatures of a room in summer without mechanical cooling General criteria and validation procedures
EN 13779:2007 Ventilation for non-residential buildings - Performance requirements for ventilation and room-conditioning systems

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