User evaluations of fabric shades with sun in the field of view: Glare model performance and implications for EN14501 Classification

Autores
Karmann, Caroline; Wienold, Jan; Yamin Garretón, Julieta Alejandra; Villalba, Ayelén María; Pattini, Andrea Elvira; Andersen, Marilyne
Año de publicación
2025
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Discomfort glare from daylight is common in workspaces, where daylight and luminance contrast between light source and background can be excessive. Fabric shadings can mitigate glare, but their light transmission properties remain difficult to characterize. This study evaluates the recommended glare classes in EN17037+A1:2022 and EN14501:2021 by analyzing data from two laboratory studies (Switzerland and Argentina) and a simulation study. The experiments involved 55 participants across 191 sessions, testing four fabrics with a low openness factor (OF<7%). Using the Osterhaus-Bailey subjective scale for glare perception, we found comfortable glare conditions (i.e., not disturbing nor intolerable) for 87-96% participants with class 3 and class 1 fabrics under the tested scenarios. However, we also found that the existing tabular classification tends to overestimate glare for fabrics with normal-normal transmittance τv, n-n larger than 0.03 are involved, as well for fabrics with lighter colors that have higher diffuse transmittances (τv, n-dif >0.03). Common glare metrics (DGP, CGI, UGP) showed strong correlations with subjective responses on the Osterhaus-Bailey scale (Spearman ρ > 0.5). DGP showed the highest correlation (ρ = 0.57) with a disturbing glare threshold of 0.43, indicating that the standard threshold of 0.40 slightly overestimates glare for shading fabrics when the sun is in the field of view. DGPmod did not perform significantly different than DGP. ROC analysis based on binary classification confirmed acceptable to excellent discrimination ability for DGP, CGI and UGP. Based on these findings and annual simulations, we recommend adjustments to the glare classification in EN14501:2021.
Fil: Karmann, Caroline. Karlsruher Institut Für Technology.; Alemania
Fil: Wienold, Jan. Ecole Polytechnique Federale de Lausanne; Francia
Fil: Yamin Garretón, Julieta Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Ambiente, Hábitat y Energía; Argentina
Fil: Villalba, Ayelén María. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Ambiente, Hábitat y Energía; Argentina
Fil: Pattini, Andrea Elvira. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Ambiente, Hábitat y Energía; Argentina
Fil: Andersen, Marilyne. Ecole Polytechnique Federale de Lausanne; Francia
Materia
DISCOMFORT GLARE
FABRIC SHADINGS
DAYLIGHTING
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/280385
Acceder
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network_name_str CONICET Digital (CONICET)
spelling User evaluations of fabric shades with sun in the field of view: Glare model performance and implications for EN14501 ClassificationKarmann, CarolineWienold, JanYamin Garretón, Julieta AlejandraVillalba, Ayelén MaríaPattini, Andrea ElviraAndersen, MarilyneDISCOMFORT GLAREFABRIC SHADINGSDAYLIGHTINGhttps://purl.org/becyt/ford/2.7https://purl.org/becyt/ford/2Discomfort glare from daylight is common in workspaces, where daylight and luminance contrast between light source and background can be excessive. Fabric shadings can mitigate glare, but their light transmission properties remain difficult to characterize. This study evaluates the recommended glare classes in EN17037+A1:2022 and EN14501:2021 by analyzing data from two laboratory studies (Switzerland and Argentina) and a simulation study. The experiments involved 55 participants across 191 sessions, testing four fabrics with a low openness factor (OF<7%). Using the Osterhaus-Bailey subjective scale for glare perception, we found comfortable glare conditions (i.e., not disturbing nor intolerable) for 87-96% participants with class 3 and class 1 fabrics under the tested scenarios. However, we also found that the existing tabular classification tends to overestimate glare for fabrics with normal-normal transmittance τv, n-n larger than 0.03 are involved, as well for fabrics with lighter colors that have higher diffuse transmittances (τv, n-dif >0.03). Common glare metrics (DGP, CGI, UGP) showed strong correlations with subjective responses on the Osterhaus-Bailey scale (Spearman ρ > 0.5). DGP showed the highest correlation (ρ = 0.57) with a disturbing glare threshold of 0.43, indicating that the standard threshold of 0.40 slightly overestimates glare for shading fabrics when the sun is in the field of view. DGPmod did not perform significantly different than DGP. ROC analysis based on binary classification confirmed acceptable to excellent discrimination ability for DGP, CGI and UGP. Based on these findings and annual simulations, we recommend adjustments to the glare classification in EN14501:2021.Fil: Karmann, Caroline. Karlsruher Institut Für Technology.; AlemaniaFil: Wienold, Jan. Ecole Polytechnique Federale de Lausanne; FranciaFil: Yamin Garretón, Julieta Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Ambiente, Hábitat y Energía; ArgentinaFil: Villalba, Ayelén María. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Ambiente, Hábitat y Energía; ArgentinaFil: Pattini, Andrea Elvira. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Ambiente, Hábitat y Energía; ArgentinaFil: Andersen, Marilyne. Ecole Polytechnique Federale de Lausanne; FranciaPergamon-Elsevier Science Ltd2025-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/280385Karmann, Caroline; Wienold, Jan; Yamin Garretón, Julieta Alejandra; Villalba, Ayelén María; Pattini, Andrea Elvira; et al.; User evaluations of fabric shades with sun in the field of view: Glare model performance and implications for EN14501 Classification; Pergamon-Elsevier Science Ltd; Building and Environment; 282; 8-2025; 1-140360-1323CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://linkinghub.elsevier.com/retrieve/pii/S0360132325007395info:eu-repo/semantics/altIdentifier/doi/10.1016/j.buildenv.2025.113259info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2026-02-26T10:29:46Zoai:ri.conicet.gov.ar:11336/280385instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982026-02-26 10:29:46.982CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv User evaluations of fabric shades with sun in the field of view: Glare model performance and implications for EN14501 Classification
title User evaluations of fabric shades with sun in the field of view: Glare model performance and implications for EN14501 Classification
spellingShingle User evaluations of fabric shades with sun in the field of view: Glare model performance and implications for EN14501 Classification
Karmann, Caroline
DISCOMFORT GLARE
FABRIC SHADINGS
DAYLIGHTING
title_short User evaluations of fabric shades with sun in the field of view: Glare model performance and implications for EN14501 Classification
title_full User evaluations of fabric shades with sun in the field of view: Glare model performance and implications for EN14501 Classification
title_fullStr User evaluations of fabric shades with sun in the field of view: Glare model performance and implications for EN14501 Classification
title_full_unstemmed User evaluations of fabric shades with sun in the field of view: Glare model performance and implications for EN14501 Classification
title_sort User evaluations of fabric shades with sun in the field of view: Glare model performance and implications for EN14501 Classification
dc.creator.none.fl_str_mv Karmann, Caroline
Wienold, Jan
Yamin Garretón, Julieta Alejandra
Villalba, Ayelén María
Pattini, Andrea Elvira
Andersen, Marilyne
author Karmann, Caroline
author_facet Karmann, Caroline
Wienold, Jan
Yamin Garretón, Julieta Alejandra
Villalba, Ayelén María
Pattini, Andrea Elvira
Andersen, Marilyne
author_role author
author2 Wienold, Jan
Yamin Garretón, Julieta Alejandra
Villalba, Ayelén María
Pattini, Andrea Elvira
Andersen, Marilyne
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv DISCOMFORT GLARE
FABRIC SHADINGS
DAYLIGHTING
topic DISCOMFORT GLARE
FABRIC SHADINGS
DAYLIGHTING
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.7
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv Discomfort glare from daylight is common in workspaces, where daylight and luminance contrast between light source and background can be excessive. Fabric shadings can mitigate glare, but their light transmission properties remain difficult to characterize. This study evaluates the recommended glare classes in EN17037+A1:2022 and EN14501:2021 by analyzing data from two laboratory studies (Switzerland and Argentina) and a simulation study. The experiments involved 55 participants across 191 sessions, testing four fabrics with a low openness factor (OF<7%). Using the Osterhaus-Bailey subjective scale for glare perception, we found comfortable glare conditions (i.e., not disturbing nor intolerable) for 87-96% participants with class 3 and class 1 fabrics under the tested scenarios. However, we also found that the existing tabular classification tends to overestimate glare for fabrics with normal-normal transmittance τv, n-n larger than 0.03 are involved, as well for fabrics with lighter colors that have higher diffuse transmittances (τv, n-dif >0.03). Common glare metrics (DGP, CGI, UGP) showed strong correlations with subjective responses on the Osterhaus-Bailey scale (Spearman ρ > 0.5). DGP showed the highest correlation (ρ = 0.57) with a disturbing glare threshold of 0.43, indicating that the standard threshold of 0.40 slightly overestimates glare for shading fabrics when the sun is in the field of view. DGPmod did not perform significantly different than DGP. ROC analysis based on binary classification confirmed acceptable to excellent discrimination ability for DGP, CGI and UGP. Based on these findings and annual simulations, we recommend adjustments to the glare classification in EN14501:2021.
Fil: Karmann, Caroline. Karlsruher Institut Für Technology.; Alemania
Fil: Wienold, Jan. Ecole Polytechnique Federale de Lausanne; Francia
Fil: Yamin Garretón, Julieta Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Ambiente, Hábitat y Energía; Argentina
Fil: Villalba, Ayelén María. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Ambiente, Hábitat y Energía; Argentina
Fil: Pattini, Andrea Elvira. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Ambiente, Hábitat y Energía; Argentina
Fil: Andersen, Marilyne. Ecole Polytechnique Federale de Lausanne; Francia
description Discomfort glare from daylight is common in workspaces, where daylight and luminance contrast between light source and background can be excessive. Fabric shadings can mitigate glare, but their light transmission properties remain difficult to characterize. This study evaluates the recommended glare classes in EN17037+A1:2022 and EN14501:2021 by analyzing data from two laboratory studies (Switzerland and Argentina) and a simulation study. The experiments involved 55 participants across 191 sessions, testing four fabrics with a low openness factor (OF<7%). Using the Osterhaus-Bailey subjective scale for glare perception, we found comfortable glare conditions (i.e., not disturbing nor intolerable) for 87-96% participants with class 3 and class 1 fabrics under the tested scenarios. However, we also found that the existing tabular classification tends to overestimate glare for fabrics with normal-normal transmittance τv, n-n larger than 0.03 are involved, as well for fabrics with lighter colors that have higher diffuse transmittances (τv, n-dif >0.03). Common glare metrics (DGP, CGI, UGP) showed strong correlations with subjective responses on the Osterhaus-Bailey scale (Spearman ρ > 0.5). DGP showed the highest correlation (ρ = 0.57) with a disturbing glare threshold of 0.43, indicating that the standard threshold of 0.40 slightly overestimates glare for shading fabrics when the sun is in the field of view. DGPmod did not perform significantly different than DGP. ROC analysis based on binary classification confirmed acceptable to excellent discrimination ability for DGP, CGI and UGP. Based on these findings and annual simulations, we recommend adjustments to the glare classification in EN14501:2021.
publishDate 2025
dc.date.none.fl_str_mv 2025-08
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/280385
Karmann, Caroline; Wienold, Jan; Yamin Garretón, Julieta Alejandra; Villalba, Ayelén María; Pattini, Andrea Elvira; et al.; User evaluations of fabric shades with sun in the field of view: Glare model performance and implications for EN14501 Classification; Pergamon-Elsevier Science Ltd; Building and Environment; 282; 8-2025; 1-14
0360-1323
CONICET Digital
CONICET
url http://hdl.handle.net/11336/280385
identifier_str_mv Karmann, Caroline; Wienold, Jan; Yamin Garretón, Julieta Alejandra; Villalba, Ayelén María; Pattini, Andrea Elvira; et al.; User evaluations of fabric shades with sun in the field of view: Glare model performance and implications for EN14501 Classification; Pergamon-Elsevier Science Ltd; Building and Environment; 282; 8-2025; 1-14
0360-1323
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://linkinghub.elsevier.com/retrieve/pii/S0360132325007395
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.buildenv.2025.113259
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Pergamon-Elsevier Science Ltd
publisher.none.fl_str_mv Pergamon-Elsevier Science Ltd
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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