<![CDATA[Ïã¸ÛÁùºÏ²Ê¿ª½± 16890-4:2022]]> /cms/render/live/es/sites/isoorg/contents/data/standard/07/95/79593.html Normas y proyectos de Ïã¸ÛÁùºÏ²Ê¿ª½± Ïã¸ÛÁùºÏ²Ê¿ª½±.org 60 /modules/isoorg-template/img/iso/favicon/red/favicon1.ico http://www.iso.org/ <![CDATA[Ïã¸ÛÁùºÏ²Ê¿ª½± 16890-4:2022]]> <![CDATA[Ïã¸ÛÁùºÏ²Ê¿ª½± 16890-4:2022 - Air filters for general ventilation — Part 4: Conditioning method to determine the minimum fractional test efficiency]]> /cms/render/live/es/sites/isoorg/contents/data/standard/07/95/79593.html /cms/render/live/es/sites/isoorg/contents/data/standard/07/95/79593.html 2022-07-29