EN 15242:2007

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

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.

Lüftung von Gebäuden - Berechnungsverfahren zur Bestimmung der Luftvolumenströme in Gebäuden einschließlich Infiltration

Diese Europäische Norm beschreibt das Verfahren zur Berechnung der durch die Lüftung verursachten Luftvolumenströme in Gebäuden, die für Anwendungen wie z. B. Energieberechnungen, Heiz- und Kühllast¬berechnungen und Bewertungen der sommerlichen Behaglichkeit und der Raumluftqualität verwendet werden.
Die Lüftungs- und Luftdichtheitsanforderungen (wie z. B. Raumluftqualität, Heizung und Kühlung, Sicherheit, Brandschutz usw.) sind nicht Gegenstand dieser Norm.
Für diese unterschiedlichen Anwendungen wird dasselbe implizite Verfahren angewendet, jedoch müssen die Eingangsparameter dem Anwendungsbereich entsprechend gewählt werden. Für bestimmte Anwendungen sind in dieser Norm auch explizite Berechnungen festgelegt. Ein vereinfachter Ansatz ist auf nationaler Ebene zulässig, sofern die Vorschriften zu dessen Anwendung eingehalten werden.
Das Verfahren ist vorgesehen für die Anwendung auf:
   Gebäude mit ventilatorgestützter Lüftung (ventilatorgestützte Abluft , Zuluft  oder kombinierte Ab  und Zuluftsysteme);
   Luftleitungen;
   Hybridsysteme, bei denen zwischen ventilatorgestützter und freier Lüftung umgeschaltet werden kann;
-   das manuelle Fensteröffnen zur Lüftung oder zur Verbesserung des Sommerkomforts.
Automatische Fenster (oder Öffnungen) sind hier nicht direkt berücksichtigt.
Die Lüftung von industriellen Betriebsabläufen fällt nicht in den Anwendungsbereich dieser Norm.
Küchen, in denen zum unmittelbaren Verzehr gekocht wird (einschließlich Restaurants usw.), sind Gegenstand der Norm.
Andere Küchen sind nicht Gegenstand dieser Norm.
Diese Norm gilt nicht direkt anwendbar auf Gebäude, die höher sind als 100 m, und Räume, bei denen die vertikale Lufttemperaturdifferenz mehr als 15 K beträgt.

Ventilation des bâtiments - Méthodes de calcul pour la détermination des débits d'air dans les bâtiments y compris l'infiltration

Prezračevanje stavb - Računske metode za določitev zračnih tokov v stavbah, vključno z infiltracijo

General Information

• Status: Withdrawn
• Publication Date: 15-May-2007
• Withdrawal Date: 13-Jun-2017
• ICS: 91.140.30 - Ventilation and air-conditioning systems
• Technical Committee: CEN/TC 156 - Ventilation for buildings
• Drafting Committee: CEN/TC 156/WG 7 - System performance
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Completion Date: 14-Jun-2017
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Directive: 89/106/EEC - Construction products
• Mandate: M/343 - Mandate to CEN, CENELEC and ETSI for the elaboration and adoption of standards for a methodology calculating the integrated energy performance of buildings and estimating the environmental impact, in accordance with the terms set forth in Directive 2002/91/EC
• Ref Project: SIST EN 15242:2007 - Ventilation for buildings - Calculation methods for the determination of air flow rates in buildings including infiltration

Relations

• Replaced By: EN 16798-7:2017 - Energy performance of buildings - Ventilation for buildings - Part 7: Calculation methods for the determination of air flow rates in buildings including infiltration (Modules M5-5)
• Effective Date: 08-Jun-2022

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Ventilation for buildings - Calculation methods for the determination of air flow rates in buildings including infiltrationVentilation des bâtiments - Méthodes de calcul pour la détermination des débits d'air y compris les infiltrations dans les bâtimentsLüftung von Gebäuden - Berechnungsverfahren zur Bestimmung der Luftvolumenströme in Gebäuden einschließlich InfiltrationTa slovenski standard je istoveten z:EN 15242:2007SIST EN 15242:2007en91.140.30VLVWHPLVentilation and air-conditioningICS:SLOVENSKI
STANDARDSIST EN 15242:200701-november-2007

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 15242May 2007ICS 91.140.30 English VersionVentilation for buildings - Calculation methods for thedetermination of air flow rates in buildings including infiltrationVentilation des bâtiments - Méthodes de calcul pour ladétermination des débits d'air y compris les infiltrationsdans les bâtimentsLüftung von Gebäuden - Berechnungsverfahren zurBestimmung der Luftvolumenströme in Gebäudeneinschließlich InfiltrationThis European Standard was approved by CEN on 26 March 2007.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2007 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 15242:2007: E

Data on wind pressure coefficients.37 Annex B (normative)
Leakages characteristics.43 Annex C (normative)
Calculation of recirculation coefficient Crec.46 Annex D (normative)
Conversion formulas.48 Annex E (informative)
Examples of fuel flow factor for residential buildings.51 Bibliography.52

Existing national regulations with or without reference to national standards, may restrict for the time being the implementation of the European Standards mentioned in this report. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

Figure 1 — scheme of relationship between standards Table 1 — Relationship between standards from To
Information transferred variables 15251 15243 Indoor climate requirements
Heating and cooling Set points
13779 15251 15242 Airflow requirement for comfort and health Required supply and exhaust Air flows 15242 15241 Air flows Air flows entering and leaving the building 15241 13792 Air flows Air flow for summer comfort calculation 15241 15203- 15315 ;15217 energy Energies per energy carrier for ventilation (fans, humidifying, precooling, pre heating), + heating and cooling for air systems 15241 13790 data for heating and cooling calculation Temperatures, humilities and flows of air entering the building

15243 15242 Data for air heating and cooling systems Required airflows when of use 15243 13790 data for building heating and cooling calculation Set point, emission efficiency, distribution recoverable losses, generation recoverable losses 13790 15243 Data for system calculation Required energy for generation EN titles are: prEN 15217 Energy performance of buildings — Methods for expressing energy performance and for energy certification of buildings prEN 15603 Energy performance of buildings - Overall energy use and definition of energy ratings prEN 15243 Ventilation for buildings — Calculation of room temperatures and of load and energy for buildings with room conditioning systems prEN ISO 13790 Thermal performance of buildings — Calculation of energy use for space heating and cooling (ISO/DIS 13790:2005) EN 15242 Ventilation for buildings — Calculation methods for the determination of air flow rates in buildings including infiltration EN 15241 Ventilation for buildings — Calculation methods for energy losses due to ventilation and infiltration in commercial buildings EN 13779 Ventilation for non-residential buildings — Performance requirements for ventilation and room-conditioning systems EN 13792 Colour coding of taps and valves for use in laboratories EN 15251 Indoor environmental input parameters for design and assessment of energy performance of buildings addressing indoor air quality, thermal environment, lighting and acoustics
The calculation of the airflows through the building envelope and the ventilation system for a given situation is first described (Clause 6). Applications depending on the intended uses are described in Clause 7. The target audience of this standard is policy makers in the building regulation sector, software developers of building simulation tools, industrial and engineering companies.

 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. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1507, Ventilation for buildings — Sheet metal air ducts with rectangular section — Requirements for strength and leakage EN 1886, Ventilation for buildings — Air handling units — Mechanical performance EN 12237, Ventilation for buildings — Ductwork — Strength and leakage of circular sheet metal ducts EN 12792:2003, Ventilation for buildings — Symbols, terminology and graphical symbols
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