SIST EN 16798-7:2018

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)

This European Standard describes the methods to calculate the ventilation air flow rates for buildings
to be used for energy calculations evaluation, heating and cooling loads.
This European Standard applies to buildings with:
-   Mechanical ventilation systems (mechanical exhaust, mechanical supply or balanced system);
-   Passive duct ventilation systems for residential and low-rise non-residential buildings;
-   Combustion appliances;
-   Windows opening by manual operation;
-   Kitchens where cooking is for immediate use (including restaurants)
This European Standard is applicable to hybrid systems combining mechanical and passive duct ventilation systems in residential and low-rise non-residential buildings.
This European Standard applies to buildings smaller than 100 m and rooms where vertical air temperature difference is smaller than 15 K.
The results provided by the standard are:
   the air flow rates entering or leaving a ventilation zone;
-   the air flow rates required to be distributed by the mechanical ventilation system, if present.
This European Standard is not applicable to:
-   Buildings with kitchens where cooking is not for immediate use
-   Buildings with automatic windows (or openings)
-   Buildings with industry process ventilation.
The definition of ventilation and airtightness requirements (as indoor air quality, heating and cooling, safety, fire protection…) is not covered by this standard.
The following information can be found in other standards and technical reports:
-   guidance to estimate pressure drops in ducts (CR 14378:2002)
Table 1 shows the relative position of this standard within the EN EPB package of standards.

Energetische Bewertung von Gebäuden - Lüftung von Gebäuden - Teil 7: Berechnungsmethoden zur Bestimmung der Luftvolumenströme in Gebäuden einschließlich Infiltration (Modul M5‑5)

Diese Europäische Norm beschreibt die Verfahren zur Berechnung der durch Lüftung verursachten Luftvolumenströme in Gebäuden, die für die Bewertung der Energieberechnungen sowie Heiz- und Kühllasten anzuwenden sind.
Die vorliegende Europäische Norm gilt für Gebäude mit:
-   ventilatorgestützten Lüftungsanlagen (ventilatorgestützte Abluft , ventilatorgestützte Zuluft  oder kombinierte Ab  und Zuluftsysteme);
-   Lüftungsanlagen mit freier Lüftung in Wohngebäuden und flachen Nichtwohngebäuden;
-   Feuerstätten;
-   manuell zu öffnenden Fenstern;
-   Küchen, in denen zum unmittelbaren Verzehr gekocht wird (einschließlich Restaurants).
Diese Europäische Norm gilt für Hybridsysteme, bei denen ventilatorgestützte Lüftungsanlagen und Lüftungsanlagen mit freier Lüftung in Wohngebäuden und flachen Nichtwohngebäuden miteinander kombiniert werden.
Die vorliegende Europäische Norm gilt für Gebäude mit geringeren Maßen als 100 m, und Räume, bei denen die vertikale Lufttemperaturdifferenz weniger als 15 K beträgt.
Bei den durch die Anwendung dieser Norm erhaltenen Ergebnissen handelt es sich um folgende:
-   die in eine Lüftungszone eintretenden und aus dieser austretenden Luftvolumenströme;
-   die durch die ventilatorgestützte Lüftungsanlage, sofern vorliegend, zu verteilenden Luftvolumenströme.
Diese Europäische Norm gilt nicht für:
-   Gebäude mit Küchen, in denen nicht zum unmittelbaren Verzehr gekocht wird;
-   Gebäude mit automatischen Fenstern (oder Öffnungen);
-   Gebäude mit Lüftung im Zusammenhang mit industriellen Prozessen.
Die Definition der Anforderungen an Lüftung und Luftdichtheit (wie z. B. Innenluftqualität, Heizung und Kühlung, Sicherheit, Brandschutz, ) wird durch diese Norm nicht abgedeckt.
Die folgenden Angaben können weiteren Normen und Fachberichten entnommen werden:
-   Anleitung zur Abschätzung von Druckverlusten in Leitungen (CR 14378:2002).
Tabelle 1 zeigt die relative Position dieser Norm innerhalb des EPBD-Normenpakets.

Performance énergétique des bâtiments - Ventilation des bâtiments - Partie 7 : Méthodes de calcul pour la détermination des débits d'air dans les bâtiments y compris les infiltrations (Modules M5‐5)

La présente norme Européenne décrit les méthodes permettant de calculer les débits d’air de ventilation des bâtiments devant être appliquées pour l'évaluation des calculs énergétiques, les besoins en chauffage et en refroidissement.
La présente Norme européenne s'applique aux bâtiments dotés :
-   de systèmes de ventilation mécanique (systèmes mécanique d’extraction, d’alimentation ou double flux) ;
-   de systèmes de ventilation à conduits passifs, pour les bâtiments résidentiels et les bâtiments non résidentiels de faible hauteur ;
-   d’appareils de combustion ;
-   de fenêtres s’ouvrant manuellement ;
-   de cuisines où les repas préparés sont consommés immédiatement (y compris les restaurants).
La présente Norme européenne s'applique aux systèmes hybrides combinant des systèmes de ventilation à conduits mécaniques et passifs dans les bâtiments résidentiels et les bâtiments non résidentiels de faible hauteur.
La présente Norme européenne s'applique aux bâtiments d'une hauteur inférieure à 100 m et aux pièces où la différence de température de l'air verticale est inférieure à 15 K.
Les résultats fournis par la présente norme sont :
-   les débits d’air pénétrant ou sortant de la zone de ventilation ;
-               les débits d’air nécessaires devant être distribués par le système de ventilation mécanique, si présent.
La présente Norme européenne ne s'applique pas aux :
-   bâtiments dotés de cuisines où les repas préparés ne sont pas consommés immédiatement ;
-   bâtiments ayant des fenêtres automatiques (ou des ouvertures) ;
-   bâtiments ayant une ventilation nécessaire aux procédés industriels.
La présente norme ne définit pas les exigences relatives à la ventilation et à l'étanchéité à l'air (telles que la qualité de l'air intérieur, le chauffage et le refroidissement, la sécurité, la protection contre les incendies.., etc.).
Les informations suivantes peuvent être trouvées dans d'autres normes et rapports techniques :
-   lignes directrices pour estimer les pertes de charge dans les conduits (CR 14378:2002).
Le Tableau 1 présente la position relative de la présente norme par rapport à l'ensemble de normes EN PEB.

Energijske lastnosti stavb - Prezračevanje stavb - 7. del: Metode za izračun in določanje količine zraka v stavbah, vključno z infiltracijo - Modul M5-5

Ta evropski standard opisuje metode za izračun pretoka zraka pri prezračevanju stavb, ki so namenjene za ocenjevanje izračunov energije ter ogrevalne in hladilne obremenitve.
Ta evropski standard se uporablja za stavbe s/z:
– mehanskimi prezračevalnimi sistemi (mehanski izpuh, mehanski dovod ali uravnotežen sistem);
– pasivnimi prezračevalni sistemi za stanovanjske in nizke nestanovanjske stavbe;
– zgorevalnimi napravami;
– okni z ročnim odpiranjem;
– kuhinjami, namenjenimi kuhanju za takojšnjo porabo (vključno z restavracijami).
Ta evropski standard se uporablja za hibridne sisteme, ki združujejo mehanske in pasivne prezračevalne sisteme v stanovanjskih in nizkih nestanovanjskih stavbah.
Ta evropski standard se nanaša na stavbe, ki so manjše od 100 m in sobe, v katerih je navpična temperaturna razlika zraka nižja od 15 K.
V standardu so navedeni naslednji rezultati:
– pretok zraka na vstopu ali izstopu iz območja prezračevanja;
– pretok zraka, ki ga mehanski prezračevalni sistem, če je nameščen, zahteva za porazdelitev zraka.
Ta evropski standard se ne uporablja za:
– stavbe s kuhinjami, ki niso namenjene kuhanju za takojšnjo porabo;
– stavbe z avtomatiziranimi okni (ali odprtinami);
– stavbe s prezračevanjem industrijskih procesov.
Ta standard ne zajema opredelitve zahtev za prezračevanje in zračno tesnost (npr. kakovost zraka v zaprtih prostorih, hlajenje in ogrevanje, varnost, požarna zaščita ...).
Naslednje informacije so na voljo v drugih standardih in tehničnih poročilih:
– navodila za ocenjevanje padcev tlaka v kanalih (CR 14378:2002).
Preglednica 1 prikazuje relativen položaj tega standarda v sklopu standardov EN EPB.

General Information

• Status: Published
• Public Enquiry End Date: 01-Mar-2015
• Publication Date: 13-Jun-2018
• ICS: 91.140.30 - Ventilation and air-conditioning systems
• Technical Committee: OGS - Heating for buildings
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 12-Dec-2017
• Due Date: 16-Feb-2018
• Completion Date: 14-Jun-2018
• Directive: 2010/31/EU - Directive 2010/31/eu of the European Parliament and of the Council of 19 May 2010 on the energy performance of buildings (recast)
• Mandate: M/480 - Mandate to CEN, CENELEC and ETSI for the elaboration and adoption of standards for a methodology calculating the integrated energy performance of buildings and promoting the energy efficiency of buildings, in accordance with the terms set in the recast of the Directive on the energy performance buildings (2010/31/EU)
• Ref Project: 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)

Relations

• Replaces: SIST EN 15242:2007 - Ventilation for buildings - Calculation methods for the determination of air flow rates in buildings including infiltration
• Effective Date: 01-Jul-2018
• Replaces: SIST EN 15242:2007 - Ventilation for buildings - Calculation methods for the determination of air flow rates in buildings including infiltration
• Effective Date: 08-Jun-2022

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.GHQEnergy performance of buildings - Ventilation for buildings - Part 7: Calculation methods for the determination of air flow rates in buildings including infiltration (Modules M5-5)91.140.30VLVWHPLVentilation and air-conditioning systemsICS:Ta slovenski standard je istoveten z:EN 16798-7:2017SIST EN 16798-7:2018en,fr,de01-julij-2018SIST EN 16798-7:2018SLOVENSKI
STANDARDSIST EN 15242:20071DGRPHãþD



SIST EN 16798-7:2018



EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 16798-7
June
t r s y ICS
{ sä s t rä s râ
{ sä s v rä u r Supersedes EN
s w t v tã t r r yEnglish Version
Energy performance of buildings æ Ventilation for buildings æ Part
yã Calculation methods for the determination of air Performance ßnergßtique des bâtiments æ Ventilation des bâtiments æ Partie
y ã Mßthodes de calcul pour la dßtermination des dßbits d 5air dans les bâtiments y
Energieeffizienz von Gebäuden æ Lüftung von Gebäuden æ Teil
yã Berechnungsmethoden zur Bestimmung der Luftvolumenströme in Gebäuden This European Standard was approved by CEN on
t y February
t r s yä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels
9
t r s y CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s x y { zæ yã t r s y ESIST EN 16798-7:2018



EN 16798-7:2017 (E) 2 Contents Page European foreword . 6 Introduction . 9 1 Scope . 11 Table 1 — Position of this standard (in casu M5–1, M5–5, M5–6, M5–8) within the modular structure of the set of EPB
standards . 12 2 Normative references . 13 3 Terms and definitions . 14 4 Symbols and subscripts . 15 4.1 Symbols . 15 Table 2 — Symbols and units . 15 4.2 Subscripts . 17 Table 3 — Subscripts . 17 5 Brief description of the methods . 18 5.1 Output of the methods . 18 5.2 General description of the methods . 18 5.3 Selection criteria between the methods . 19 6 Calculation method, method 1 — Determination of air flow rates based on detailed building characteristics . 19 6.1 Output data . 19 Table 4 — Output data of method 1 . 19 6.2 Calculation intervals . 20 6.3 Input data . 20 6.3.1 General . 20 6.3.2 Product data . 21 Table 5 — Product technical input data list. 21 6.3.3 System design data . 22 Table 6 — Identifiers for VENT_SYS_OP . 22 Table 7 — Process design input data list . 22 Table 8 — Identifiers for SUP_AIR_TEMP_CTRL . 24 Table 9 — Identifiers for SUP_AIR_FLW_CTRL . 24 6.3.4 Operating conditions . 24 Table 10 — Operating conditions data list . 24 6.3.5 Constants and physical data . 26 Table 11 — Constants and physical data . 26 6.3.6 Input data from Annex A (Annex B). 26 6.4 Calculation procedure, method 1 . 26 6.4.1 Applicable time intervals and states of operation . 26 6.4.2 Operating conditions calculation . 26 SIST EN 16798-7:2018



EN 16798-7:2017 (E) 3 6.4.3 Calculation of air flow rates . 28 7 Method 2 — Determination of air flow rates based on statistical approach . 38 7.1 Output data . 38 Table 12 — Output data of method 2 . 39 7.2 Calculation intervals . 39 7.3 Input data . 39 7.4 Calculation procedure, method 2 . 39 7.4.1 General . 39 7.4.2 Description of the statistically based simplified method . 40 7.4.3 Justification of the method . 40 8 Quality control . 40 9 Compliance check . 41 Annex A (normative)
Input and method selection data sheet – Template. 42 A.1 General . 42 A.2 References . 43 Table A.1 —References . 43 A.3 Input data method 1 . 43 A.3.1 Product description data . 43 A.3.2 Product technical data . 43 A.3.2.1 Discharge coefficient for vents, air terminal devices, windows . 43 A.3.2.2 Airflow exponent for vents, air terminal devices, windows . 43 A.3.2.3 Combustion air flows factors . 44 Table A.2 — Data for appliance system factor . 44 Table A.3 — Data for fuel flow factor . 44 A.3.2.4 Mechanical ventilation . 44 Table A.4 —Values for fctrl . 45 Table A.5 — Values for fsys . 45 A.3.3 System design data . 45 A.3.3.1 Supply air temperature control . 45 A.3.3.2 Exposure to wind . 45 Table A.6 — Identifiers for SHIELD_CLASS . 45 A.3.3.3 Pressure coefficients associated to an air flow path . 45 Table A.7 — Dimensionless wind pressures coefficients . 46 Table A.8 — Dimensionless wind pressures coefficients for
ventilation zone that cannot be cross-ventilated (fcross = 0) . 46 A.3.3.4 Difference of wind pressure coefficients . 46 A.3.3.5 Pressure coefficient of the cowl at roof height. 46 A.3.3.6 Correction coefficient for accounting for height of cowl above roof level . 46 Table A.9 — Ccowl;height
values . 47 SIST EN 16798-7:2018



EN 16798-7:2017 (E) 4 A.3.3.7 Ventilation effectiveness . 47 A.3.3.8 Airing factor . 47 A.3.3.9 Cross-ventilation factor . 47 Table A.10 — Cross-ventilation factor . 47 A.3.3.10 Number of window divisions . 48 A.3.3.11 Stack effect in passive and hybrid duct . 48 A.3.3.12 Distribution of vents . 48 Table A.11 — Distribution of vents . 48 A.3.3.13 Reference pressure for the envelope airtightness index . 48 A.3.3.14 Flow exponent through leaks . 48 A.3.3.15 Leakage coefficient of the ventilation zone . 48 A.3.3.16 Envelope leakage distribution . 48 Table A.12 — Envelope leakage distribution . 48 A.3.3.17 Typical internal doorway area . 49 A.3.4 Operating conditions data . 49 A.3.4.1 Maximum wind speed for cross-ventilation calculation . 49 A.3.4.2 Wind speed correction factors . 49 Table A.13 — Correction factor Crgh;10;site . 49 A.3.4.3 Ventilation system operation . 49 Table A.14 — Identifiers for VENT_SYS_OP . 49 A.4 Input data method 2 . 49 Annex B (informative)
Input and method selection data sheet – Default choices . 50 B.1 General . 50 B.2 References . 51 Table B.1 —References. 51 B.3 Input data method 1 . 51 B.3.1 Product description data . 51 B.3.2 Product technical data . 51 B.3.2.1 Discharge coefficient for vents, air terminal devices, windows . 51 B.3.2.2 Airflow exponent for vents, air terminal devices, windows . 52 B.3.2.3 Combustion air flows factors . 52 Table B.2 — Data for appliance system factor . 52 Table B.3 — Data for fuel flow factor . 52 B.3.2.4 Mechanical ventilation . 53 Table B.4 — Values for fctrl . 53 Table B.5 — Values for fsys . 53 SIST EN 16798-7:2018



EN 16798-7:2017 (E) 5 B.3.3 System design data . 53 B.3.3.1 Supply air temperature control . 53 B.3.3.2 Exposure to wind . 54 Table B.6 — Identifiers for SHIELD_CLASS . 54 B.3.3.3 Pressure coefficients associated to an air flow path . 54 Table B.7 — Dimensionless wind pressures coefficients . 54 Table B.8 — Dimensionless wind pressures for ventilation zone that cannot be cross-ventilated (fcross = 0) . 54 B.3.3.4 Difference of wind pressure coefficients . 54 B.3.3.5 Pressure coefficient of the cowl at roof height. 55 B.3.3.6 Correction coefficient for accounting for height of cowl above roof level . 55 Table B.9 — Ccowl;height
values . 55 B.3.3.7 Ventilation effectiveness . 55 B.3.3.8 Airing factor . 55 B.3.3.9 Cross-ventilation factor . 55 Table B.10 — Cross-ventilation factor . 56 B.3.3.10 Number of window divisions . 56 B.3.3.11 Stack effect in passive and hybrid duct . 56 B.3.3.12 Distribution of vents . 56 Table B.11 — Distribution of vents . 56 B.3.3.13 Reference pressure for the envelope airtightness index . 57 B.3.3.14 Flow exponent through leaks . 57 B.3.3.15 Leakage coefficient of the ventilation zone . 57 B.3.3.16 Envelope leakage distribution . 57 Table B.12 — Envelope leakage distribution . 57 B.3.3.17 Typical internal doorway area . 58 B.3.4 Operating conditions data . 58 B.3.4.1 Maximum wind speed for cross-ventilation calculation . 58 B.3.4.2 Wind speed correction factors . 58 Table B.13 — Correction factor Crgh;10;site . 58 B.3.4.3 Ventilation system operation . 58 Table B.14 — Identifiers for VENT_SYS_OP . 58 B.4 Input data method 2 . 58 Bibliography . 59
SIST EN 16798-7:2018



EN 16798-7:2017 (E) 6 European foreword This document (EN 16798-7:2017) has been prepared by Technical Committee CEN/TC 156 “Ventilation for buildings”, the secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by December 2017, and conflicting national standards shall be withdrawn at the latest by December 2017. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. This standard has been produced to meet the requirements of Directive 2010/31/EU 19 May 2010 on the energy performance of buildings (recast), referred to as “recast EPDB”. This document supersedes EN 15242:2007.
This document was produced to meet the requirements of Directive 2002/91/EC 16 December 2002 on energy performance of buildings referred to as “EPBD”. The revision for inclusion in the second mandate package was performed by CEN/ TC 156/ WG 21. The revision includes the following changes: — rearrangement of content versus EN 15242:2007, in order to better fit in the modular structure given in EN ISO 52000-1. This document is restricted to emission and control of the ventilation air flow rates (M5-5); — clarification of possibility to use 2 methods to calculate the airflow rates: method 1 based on detailed building characteristics; and method 2 using a statistical approach complying with specific rules; — in method 1, addition of several options for the calculation of the airflow rates through windows, including cross-ventilation; — in method 1, calculation of the airflow rates using mass balance only; — formatting according to the new rules set in prCEN/TS 16629; and — consideration of ISO/TC 205 work performed in the meantime. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. SIST EN 16798-7:2018



EN 16798-7:2017 (E) 7 For the convenience of Standards users CEN/TC 156, together with responsible Working Group Conveners, have prepared a simple table below relating, where appropriate, the relationship between the ‘EPBD’ and ‘recast EPBD’ standard numbers prepared by Technical Committee CEN/TC 156 “Ventilation for buildings”. EPBD EN Number Recast EPBD EN Number Title EN 15251 EN 16798–1 Energy performance of buildings – Ventilation for buildings - Part 1:
Indoor environmental input parameters for design and assessment of energy performance of buildings addressing indoor air quality, thermal environment, lighting and acoustics (Module M1-6) N/A CEN/TR 16798–2 Energy performance of buildings – Ventilation for buildings - Part 2: Interpretation of the requirements in EN 16798-1
- Indoor environmental input parameters for design and assessment of energy performance of buildings addressing indoor air quality, thermal environment, lighting and acoustics (Module M1-6) EN 13779 EN 16798–3 Energy performance of buildings – Ventilation for buildings - Part 3: For non-residential buildings – Performance requirements for ventilation and room-conditioning systems (Modules M5-1, M5-4) N/A CEN/TR 16798–4 Energy performance of buildings – Ventilation for buildings -
Part 4: Interpretation of the requirements in EN
16798- 3 - For non-residential buildings – Performance requirements for ventilation and room-conditioning systems(Modules M5-1, M5-4)
EN 15241 EN 16798–5–1 Energy performance of buildings — Ventilation for buildings – Part 5-1: Calculation methods for energy requirements of ventilation and air conditioning systems (Modules M5-6, M5-8, M6-5, M6-8, M7-5, M7-8) — Method 1: Distribution and generation EN 15241 EN 16798–5–2 Energy performance of buildings – Ventilation for buildings - Part 5-2: Calculation methods for energy requirements of ventilation systems (Modules M5-6, M5-8, M6-5, M6-8, M7-5, M7-8) - Method 2: Distribution and generation N/A CEN/TR 16798–6 Energy performance of buildings - Ventilation for buildings – Part 6: Interpretation of the requirements in EN 16798-5 -1 and EN 16798-5-2 – Calculation methods for energy requirements of ventilation and air conditioning systems (Modules M5-6, M5-8, M 6-5, M6-8 , M7-5, M7-8) EN 15242 EN 16798–7 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) SIST EN 16798-7:2018



EN 16798-7:2017 (E) 8 EPBD EN Number Recast EPBD EN Number Title N/A CEN/TR 16798–8 Energy performance of buildings – Ventilation for buildings – Part 8: Interpretation of the requirements in EN 16798-7 – Calculation methods for the determination of air flow rates in buildings including infiltration – (Modules M5-5) EN 15243 EN 16798–9 Energy performance of buildings – Ventilation for buildings - Part 9: Calculation methods for energy requirements of cooling systems
(Modules M4-1, M4-4, M4-9) - General N/A CEN/TR 16798–10 Energy performance of buildings – Ventilation for buildings – Part 10: Interpretation of the requirements in EN 16798-9 – Calculation methods for ener
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