SVENS K STANDARD SS-EN 17037:2018

SVENSK STANDARDSS-EN 17037:2018Fastställd/Approved: 2018-12-18Utgåva/Edition: 1Språk/Language: engelska/EnglishICS: 12.020;91.040.01;91.160.01;94.100

Dagsljus i byggnader

Daylight in buildings

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Europastandarden EN 17037:2018 gäller som svensk standard. Detta dokument innehåller den officiella engelska versionen av EN 17037:2018.

Denna standard ersätter SS 914201, utgåva 1.

The European Standard EN 17037:2018 has the status of a Swedish Standard. This document contains the official version of EN 17037:2018.

This standard supersedes the SS 914201, edition 1.

Denna standard är framtagen av kommittén för Ljus och belysning, SIS / TK 380 / AG 03.

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Detta dokument innehåller ett svenskt nationellt förord och en svensk nationell bilaga som är skrivna på svenska och översatta till engelska.

This document contains a Swedish national foreword and a Swedish national annex that are written in Swedish and translated to English.



EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM

EN 17037 December 2018

ICS 91.160.01 English Version Daylight in buildings L'éclairage naturel des bâtiments Tageslicht in Gebäuden

This European Standard was approved by CEN on 29 July 2018. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC 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 translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION C O M I T É E U R O P É E N D E N O R M A L I S A T I O N E U R O P Ä I S C H E S K O M I T E E F Ü R N O R M U N G CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2018 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 17037:2018 E

SS-EN 17037:2018 (E)


SS-EN 17037:2018 (E)


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Contents Page

European foreword ....................................................................................................................................................... 5

Introduction .................................................................................................................................................................... 6

1 Scope .................................................................................................................................................................... 7

2 Normative references .................................................................................................................................... 7

3 Terms and definitions ................................................................................................................................... 7

4 Symbols and abbreviations ...................................................................................................................... 10

5 Assessment of daylight in interior spaces ........................................................................................... 12

5.1 Daylight Provision ....................................................................................................................................... 12 5.1.1 General ............................................................................................................................................................. 12 5.1.2 Criteria for daylight provision................................................................................................................. 12 5.1.3 Daylight Provision Calculation Methods .............................................................................................. 12 5.1.4 Verification of daylight provision .......................................................................................................... 13 5.2 Assessment for view out ............................................................................................................................ 13 5.2.1 General ............................................................................................................................................................. 13 5.2.2 Criteria for view out .................................................................................................................................... 14 5.2.3 Verification of view out .............................................................................................................................. 14 5.3 Exposure to sunlight ................................................................................................................................... 14 5.3.1 General ............................................................................................................................................................. 14 5.3.2 Criteria for exposure to sunlight ............................................................................................................ 14 5.3.3 Verification of sunlight duration ............................................................................................................ 14 5.4 Protection from glare ................................................................................................................................. 14 5.4.1 General ............................................................................................................................................................. 14 5.4.2 Criteria for protection from glare .......................................................................................................... 15 5.4.3 Verification for protection from glare .................................................................................................. 15

Annex A (informative) Recommendations ......................................................................................................... 16

A.1 General ............................................................................................................................................................. 16

A.2 Recommendations for daylight provision in a space ...................................................................... 16

A.3 Recommendations for view ...................................................................................................................... 20

A.4 Recommendation for exposure to sunlight ........................................................................................ 21

A.5 Recommendation for glare protection ................................................................................................. 21

Annex B (informative) Daylight ............................................................................................................................. 23

B.1 General ............................................................................................................................................................. 23

B.2 Calculation grids ........................................................................................................................................... 23

B.3 Calculation methods .................................................................................................................................... 24

B.3.1 General ............................................................................................................................................................. 24

Swedish national foreword ........................................................................................................................................ 4

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B.3.2 Calculation method using daylight factor (method 1) .................................................................... 24

B.3.3 Calculation method using illuminance level (method 2) ............................................................... 25

B.4 Daylight availability ..................................................................................................................................... 25

B.5 Validation of actual daylighting performance ................................................................................... 26

Annex C (informative) View out .............................................................................................................................. 27

C.1 General ............................................................................................................................................................. 27

C.2 Quality of view out ........................................................................................................................................ 27

C.3 Width of view out .......................................................................................................................................... 27

C.4 Verification of view ...................................................................................................................................... 32

C.4.1 Simplified verification method ................................................................................................................ 32

C.4.2 Advanced verification method ................................................................................................................. 33

Annex D (informative) Exposure to sunlight ..................................................................................................... 36

D.1 General ............................................................................................................................................................. 36

D.2 Principle of assessment of hours of sunlight ...................................................................................... 36

D.3 Method using software ............................................................................................................................... 38

D.4 Method using manual geometric constructions ................................................................................ 40

D.5 Determination of the position of the sun in the sky ......................................................................... 40

D.6 Evaluation rules for sunlight duration ................................................................................................. 45

D.7 Sunlight duration in the reference point P .......................................................................................... 46

D.7.1 Example ............................................................................................................................................................ 46

D.7.2 Calculation....................................................................................................................................................... 46

D.7.3 Result ................................................................................................................................................................ 47

D.8 On-site verification of duration of exposure to sunlight ................................................................ 48

Annex E (informative) Glare .................................................................................................................................... 50

E.1 General ............................................................................................................................................................. 50

E.2 Daylight Glare Probability ......................................................................................................................... 50

E.3 Annual evaluation ........................................................................................................................................ 51

E.3.1 General ............................................................................................................................................................. 51

E.3.2 Simplified annual glare evaluation ........................................................................................................ 52

E.3.2.1 General ............................................................................................................................................................. 52

E.3.2.2 Solar protection device being opaque in the extended and close position ............................. 53

E.3.2.3 Solar protection device where the curtain is made of textile, film or perforatedopaque material ............................................................................................................................................ 53

E.3.2.4 Non-diffusing glazing device with a low variable light transmittance (e.g.electrochromic glazing).............................................................................................................................. 56

E.3.2.5 Sunshine zones .............................................................................................................................................. 58

E.4 Reflections or veiling glare ....................................................................................................................... 59

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E.5 Verification of the glare protection capability of shadings ........................................................... 59

Annex F (informative) A–deviations ..................................................................................................................... 62

Bibliography ................................................................................................................................................................. 64

Annex NA (informative) Additional daylight factors for Sweden................................................................ 63

SS-EN 17037:2018 (E)


Swedish national foreword

This document recommends that 50 % of the surface in the rooms where people stay more than temporarily should have an internal illuminance of at least 300 lux during 50 % of the time when daylight is present and that the remaining surface should also have a certain illuminance. This corresponds to a target daylight factor (DT). However, due to Sweden's geographical location, higher target daylight factors are needed to achieve the same amount of daylight as in countries in southern Europe.

It is scientifically proven that daylight affects human well-being and health. However, it is not scientifically proven exactly how much daylight a person needs. Therefore, this document only indicates the values for the subjective experience of good daylight. People in northern countries, who have less access to daylight during the darker parts of the year, are forced to accept that it is simply not practical to always obtain as much daylight indoors as recommended by the standard.

Table A.3 in this document shows daylight factors corresponding to different external illuminance levels occurring at the various European capitals. This document contains a Swedish national annex with Table NA.1, which shows the daylight factors (D) that correspond to different external illuminance levels that occur at some additional locations in Sweden in addition to Stockholm.

Svenskt nationellt förord

Detta dokument rekommenderar att 50 % av ytan i de rum där människor uppehåller sig mer än tillfälligt bör ha en belysningsstyrka inomhus av minst 300 lux under 50 % av den tid då det finns dagsljus samt att även resterande yta bör ha en viss belysningsstyrka. Detta korresponderar mot ett målvärde för en dagsljusfaktor (DT). På grund av Sveriges geografiska läge behövs det dock högre målvärden för dagsljusfaktor för att uppnå samma mängd av dagsljus som i länder i södra Europa.

Det är vetenskapligt bevisat att dagsljus påverkar människans välbefinnande och hälsa. Däremot är det inte vetenskapligt bevisat exakt hur mycket dagsljus människan behöver. Därför anger detta dokument endast värden för den subjektiva upplevelsen av bra dagsljus. Människor i nordliga länder, som har mindre tillgång till dagsljus under de mörka delarna av året, tvingas att acceptera att det helt enkelt inte är praktiskt möjligt att alltid få så mycket dagsljus inomhus som rekommenderas av dokumentet.

Tabell A.3 i detta dokument visar dagsljusfaktorer som motsvarar olika belysningsstyrkor utomhus som förekommer vid de olika europeiska huvudstäderna. I detta dokument finns en svensk nationell bilaga med tabell NA.1 som visar vilka dagsljusfaktorer (D) som korresponderar mot olika belysningsstyrkor utomhus som förekommer vid några ytterligare orter i Sverige utöver Stockholm.

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SS-EN 17037:2018 (E)


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European foreword

This document (EN 17037:2018) has been prepared by Technical Committee CEN/TC 169 “Light and Lighting”, the secretariat of which is held by DIN.

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 June 2019, and conflicting national standards shall be withdrawn at the latest by June 2019.

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.

According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

SS-EN 17037:2018 (E)


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SVENS K STANDARD SS-EN 17037:2018