{"id":20389,"date":"2026-02-03T08:00:54","date_gmt":"2026-02-03T08:00:54","guid":{"rendered":"https:\/\/www.enertechsolution.it\/cleanrooms-iso-classification-and-engineering-requirements\/"},"modified":"2026-09-24T15:35:52","modified_gmt":"2026-09-24T15:35:52","slug":"cleanrooms-iso-classification-and-engineering-requirements","status":"publish","type":"post","link":"https:\/\/www.enertechsolution.it\/en\/cleanrooms-iso-classification-and-engineering-requirements\/","title":{"rendered":"Cleanrooms: ISO Classification and Engineering Requirements"},"content":{"rendered":"[vc_row type=&#8221;in_container&#8221; full_screen_row_position=&#8221;middle&#8221; column_margin=&#8221;default&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; scene_position=&#8221;center&#8221; text_color=&#8221;dark&#8221; text_align=&#8221;left&#8221; row_border_radius=&#8221;none&#8221; row_border_radius_applies=&#8221;bg&#8221; 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tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221;][vc_row_inner column_margin=&#8221;default&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; text_align=&#8221;left&#8221; row_position=&#8221;default&#8221; row_position_tablet=&#8221;inherit&#8221; row_position_phone=&#8221;inherit&#8221; overflow=&#8221;visible&#8221; pointer_events=&#8221;all&#8221;][vc_column_inner column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; overflow=&#8221;visible&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/2&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]<strong>Author: Federico Re Ferr\u00e8<\/strong>[\/vc_column_text][\/vc_column_inner][vc_column_inner column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; 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overflow=&#8221;visible&#8221; pointer_events=&#8221;all&#8221;][vc_column_inner column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; overflow=&#8221;visible&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/1&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]\n<h2>Key Points<\/h2>\n[\/vc_column_text]<div class=\"nectar-fancy-ul\" data-list-icon=\"icon-salient-check\" data-animation=\"false\" data-animation-delay=\"0\" data-color=\"accent-color\" data-spacing=\"default\" data-alignment=\"left\"> \n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>A cleanroom <\/b><span style=\"font-weight: 400;\">is an area characterized by<\/span><b> stringent cleanliness and air control requirements<\/b><span style=\"font-weight: 400;\"> to prevent contamination of the products or items contained within.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>The classification of cleanrooms <\/b><span style=\"font-weight: 400;\">is defined by the<\/span><b> ISO 14644-1<\/b><span style=\"font-weight: 400;\">, which divides them into <\/span><b>9 classes<\/b><span style=\"font-weight: 400;\"> based on the concentration of particulate matter per cubic meter of air.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">To meet such stringent requirements, the following are necessary:<\/span><b> high air changes per hour and high filtration efficiencies<\/b><span style=\"font-weight: 400;\">, achieved using HEPA or ULPA filters.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Airflows can be turbulent or laminar<\/b><span style=\"font-weight: 400;\">, with <\/span><b>vertical configurations<\/b><span style=\"font-weight: 400;\"> or <\/span><b>horizontal<\/b><span style=\"font-weight: 400;\"> depending on the class <\/span><b>ISO<\/b><span style=\"font-weight: 400;\"> class required.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Managing differential pressure <\/b><span style=\"font-weight: 400;\">is essential to prevent<\/span><b> contamination<\/b><span style=\"font-weight: 400;\">, keeping the cleanroom at a higher pressure than the adjacent areas.<\/span><\/li>\n<\/ul>\n <\/div>[\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row][vc_row type=&#8221;in_container&#8221; 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phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; column_position=&#8221;default&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/1&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221;][vc_row_inner column_margin=&#8221;default&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; text_align=&#8221;left&#8221; row_position=&#8221;default&#8221; row_position_tablet=&#8221;inherit&#8221; row_position_phone=&#8221;inherit&#8221; overflow=&#8221;visible&#8221; pointer_events=&#8221;all&#8221;][vc_column_inner column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; overflow=&#8221;visible&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/1&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]<span style=\"font-weight: 400;\">One  <\/span><b>clean room<\/b><span style=\"font-weight: 400;\">, known in English as \u201c<\/span><b>cleanroom<\/b><span style=\"font-weight: 400;\">&#8220;, is an area characterized by  <\/span><b>strict cleaning requirements<\/b><span style=\"font-weight: 400;\">  and  <\/span><b>air control<\/b><span style=\"font-weight: 400;\">  in order to  <\/span><b>Do not contaminate the products<\/b><span style=\"font-weight: 400;\">  or the items contained therein.  <\/span><span style=\"font-weight: 400;\">The  <\/span><b>clean room<\/b><span style=\"font-weight: 400;\">  is used in  <\/span><b>a wide range of sectors<\/b><span style=\"font-weight: 400;\">,  <\/span><span style=\"font-weight: 400;\">including<\/span><span style=\"font-weight: 400;\">:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">sector <\/span><b>food<\/b><span style=\"font-weight: 400;\">;<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">sector <\/span><b>aerospace<\/b><span style=\"font-weight: 400;\">;<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>electronics<\/b><span style=\"font-weight: 400;\">;<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>pharmaceutical industry<\/b><span style=\"font-weight: 400;\">.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">This article will outline the main <\/span><b>system specifications<\/b><span style=\"font-weight: 400;\"> and the requirements necessary to ensure a very high level of cleanliness. <\/span>[\/vc_column_text][image_with_animation image_url=&#8221;17329&#8243; image_size=&#8221;full&#8221; max_width=&#8221;100%&#8221; max_width_mobile=&#8221;default&#8221; animation_type=&#8221;entrance&#8221; animation=&#8221;None&#8221; animation_movement_type=&#8221;transform_y&#8221; hover_animation=&#8221;none&#8221; alignment=&#8221;&#8221; border_radius=&#8221;15px&#8221; box_shadow=&#8221;small_depth&#8221; image_loading=&#8221;default&#8221;][\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row][vc_row type=&#8221;in_container&#8221; full_screen_row_position=&#8221;middle&#8221; column_margin=&#8221;default&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; scene_position=&#8221;center&#8221; text_color=&#8221;dark&#8221; text_align=&#8221;left&#8221; row_border_radius=&#8221;none&#8221; row_border_radius_applies=&#8221;bg&#8221; overflow=&#8221;visible&#8221; overlay_strength=&#8221;0.3&#8243; gradient_direction=&#8221;left_to_right&#8221; shape_divider_position=&#8221;bottom&#8221; bg_image_animation=&#8221;none&#8221;][vc_column column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; column_position=&#8221;default&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/1&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]\n<h2>Table of Contents<\/h2>\n[\/vc_column_text][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><a href=\"#1\"><span style=\"font-weight: 400;\">Cleanroom Classification: Filtration Classes<\/span><\/a><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><a href=\"#2\"><span style=\"font-weight: 400;\">Air Filtration in Cleanrooms<\/span><\/a><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><a href=\"#3\"><span style=\"font-weight: 400;\">Types of Ventilation and Air Exchange Rates<\/span><\/a><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><a href=\"#4\"><span style=\"font-weight: 400;\">FAQ<\/span><\/a><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><a href=\"#5\"><span style=\"font-weight: 400;\">The Enertech Solution Method for Addressing Cleanroom Challenges<\/span><\/a><\/li>\n<\/ul>\n[\/vc_column_text][\/vc_column][\/vc_row][vc_row type=&#8221;in_container&#8221; full_screen_row_position=&#8221;middle&#8221; column_margin=&#8221;default&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; scene_position=&#8221;center&#8221; text_color=&#8221;dark&#8221; text_align=&#8221;left&#8221; row_border_radius=&#8221;none&#8221; row_border_radius_applies=&#8221;bg&#8221; overflow=&#8221;visible&#8221; id=&#8221;1&#8243; overlay_strength=&#8221;0.3&#8243; gradient_direction=&#8221;left_to_right&#8221; shape_divider_position=&#8221;bottom&#8221; bg_image_animation=&#8221;none&#8221; gradient_type=&#8221;default&#8221; shape_type=&#8221;&#8221;][vc_column column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; column_position=&#8221;default&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/1&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221;][vc_row_inner column_margin=&#8221;default&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; text_align=&#8221;left&#8221; row_position=&#8221;default&#8221; row_position_tablet=&#8221;inherit&#8221; row_position_phone=&#8221;inherit&#8221; overflow=&#8221;visible&#8221; pointer_events=&#8221;all&#8221;][vc_column_inner column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; overflow=&#8221;visible&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/1&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221;][divider line_type=&#8221;No Line&#8221; custom_height=&#8221;20&#8243;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]\n<h2><strong>Cleanroom Classification: Filtration Classes<\/strong><\/h2>\n[\/vc_column_text][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]<span style=\"font-weight: 400;\">The standard most commonly considered for the <\/span><b>air quality requirements<\/b><span style=\"font-weight: 400;\"> for cleanrooms is <\/span><b>ISO 14644-1<\/b><span style=\"font-weight: 400;\"> , which establishes a classification system for <\/span><b>cleanrooms<\/b><span style=\"font-weight: 400;\"> based on <\/span><b>concentration<\/b><span style=\"font-weight: 400;\"> per <\/span><b>m\u00b3<\/b><span style=\"font-weight: 400;\"> of <\/span><b>particulate matter in the air<\/b><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The following is the <\/span><b>classification of the standard<\/b><span style=\"font-weight: 400;\"> which covers <\/span><b>9 classes of cleanrooms<\/b><span style=\"font-weight: 400;\"> from <\/span><b>1<\/b><span style=\"font-weight: 400;\"> (most efficient) to <\/span><b>9 <\/b> <span style=\"font-weight: 400;\">(less efficient). It is worth noting that the   <\/span><b>concentrations per cubic meter<\/b><span style=\"font-weight: 400;\">  The following are  <\/span><b>cumulative<\/b><span style=\"font-weight: 400;\">  of all particles of the specified size and larger; for example, a  <\/span><b>4th grade<\/b><span style=\"font-weight: 400;\">  has a limit of  <\/span><b>2.370<\/b><span style=\"font-weight: 400;\">  particles from  <\/span><b>0.2 \u00b5m<\/b><span style=\"font-weight: 400;\">  or higher, so  <\/span><b>2.370<\/b><span style=\"font-weight: 400;\">  includes  <\/span><b>all particles<\/b><span style=\"font-weight: 400;\">  larger sizes such as  <\/span><b>0.3 \u00b5m<\/b><span style=\"font-weight: 400;\">  (which have a limit  <\/span><b>1.020<\/b><span style=\"font-weight: 400;\">),  <\/span><b>0.5 \u00b5m<\/b><span style=\"font-weight: 400;\">  (which have a limit  <\/span><b>352<\/b><span style=\"font-weight: 400;\">) and so on.<\/span>[\/vc_column_text][vc_raw_html css=&#8221;&#8221;]<div style="overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 20px 0;">
  <table style="border-collapse: collapse; width: 100%; min-width: 800px; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; font-size: 14px; line-height: 1.5; border: 1px solid #ccc;">
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      <tr>
        <th rowspan="2" style="border: 1px solid #ccc; padding: 12px; text-align: center; vertical-align: middle; background-color: #f2f2f2; font-weight: bold;">ISO Classification</th>
        <th colspan="6" style="border: 1px solid #ccc; padding: 12px; text-align: center; background-color: #f2f2f2; font-weight: bold;">Maximum permissible concentration (particles per m³) for particles equal to or larger than the sizes listed below</th>
      </tr>
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        <th style="border: 1px solid #ccc; padding: 10px; text-align: center; background-color: #f2f2f2; font-weight: bold;">0.1 µm</th>
        <th style="border: 1px solid #ccc; padding: 10px; text-align: center; background-color: #f2f2f2; font-weight: bold;">0.2 µm</th>
        <th style="border: 1px solid #ccc; padding: 10px; text-align: center; background-color: #f2f2f2; font-weight: bold;">0.3 µm</th>
        <th style="border: 1px solid #ccc; padding: 10px; text-align: center; background-color: #f2f2f2; font-weight: bold;">0.5 µm</th>
        <th style="border: 1px solid #ccc; padding: 10px; text-align: center; background-color: #f2f2f2; font-weight: bold;">1 µm</th>
        <th style="border: 1px solid #ccc; padding: 10px; text-align: center; background-color: #f2f2f2; font-weight: bold;">5 µm</th>
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      <tr><td style="border: 1px solid #ccc; padding: 10px; font-weight: bold;">ISO Class 1</td><td style="border: 1px solid #ccc; padding: 10px; text-align: center;">10</td><td style="border: 1px solid #ccc; padding: 10px;"></td><td style="border: 1px solid #ccc; padding: 10px;"></td><td style="border: 1px solid #ccc; padding: 10px;"></td><td style="border: 1px solid #ccc; padding: 10px;"></td><td style="border: 1px solid #ccc; padding: 10px;"></td></tr>
      <tr><td style="border: 1px solid #ccc; padding: 10px; font-weight: bold;">ISO Class 2</td><td style="border: 1px solid #ccc; padding: 10px; text-align: center;">100</td><td style="border: 1px solid #ccc; padding: 10px; text-align: center;">24</td><td style="border: 1px solid #ccc; padding: 10px; text-align: center;">10</td><td style="border: 1px solid #ccc; padding: 10px;"></td><td style="border: 1px solid #ccc; padding: 10px;"></td><td style="border: 1px solid #ccc; padding: 10px;"></td></tr>
      <tr><td style="border: 1px solid #ccc; padding: 10px; font-weight: bold;">ISO Class 3</td><td style="border: 1px solid #ccc; padding: 10px; text-align: center;">1,000</td><td style="border: 1px solid #ccc; padding: 10px; text-align: center;">237</td><td style="border: 1px solid #ccc; padding: 10px; text-align: center;">102</td><td style="border: 1px solid #ccc; padding: 10px; text-align: center;">35</td><td style="border: 1px solid #ccc; padding: 10px;"></td><td style="border: 1px solid #ccc; padding: 10px;"></td></tr>
      <tr><td style="border: 1px solid #ccc; padding: 10px; font-weight: bold;">ISO Class 4</td><td style="border: 1px solid #ccc; padding: 10px; text-align: center;">10.000</td><td style="border: 1px solid #ccc; padding: 10px; text-align: center;">2.370</td><td style="border: 1px solid #ccc; padding: 10px; text-align: center;">1.020</td><td style="border: 1px solid #ccc; padding: 10px; text-align: center;">352</td><td style="border: 1px solid #ccc; padding: 10px; text-align: center;">83</td><td style="border: 1px solid #ccc; padding: 10px;"></td></tr>
      <tr><td style="border: 1px solid #ccc; padding: 10px; font-weight: bold;">ISO Class 5</td><td style="border: 1px solid #ccc; padding: 10px; text-align: center;">100.000</td><td style="border: 1px solid #ccc; padding: 10px; text-align: center;">23.700</td><td style="border: 1px solid #ccc; padding: 10px; text-align: center;">10.200</td><td style="border: 1px solid #ccc; padding: 10px; text-align: center;">3.520</td><td style="border: 1px solid #ccc; padding: 10px; text-align: center;">832</td><td style="border: 1px solid #ccc; padding: 10px;"></td></tr>
      <tr><td style="border: 1px solid #ccc; padding: 10px; font-weight: bold;">ISO Class 6</td><td style="border: 1px solid #ccc; padding: 10px; text-align: center;">1.000.000</td><td style="border: 1px solid #ccc; padding: 10px; text-align: center;">237.000</td><td style="border: 1px solid #ccc; padding: 10px; text-align: center;">102.000</td><td style="border: 1px solid #ccc; padding: 10px; text-align: center;">35.200</td><td style="border: 1px solid #ccc; padding: 10px; text-align: center;">8.320</td><td style="border: 1px solid #ccc; padding: 10px; text-align: center;">293</td></tr>
      <tr><td style="border: 1px solid #ccc; padding: 10px; font-weight: bold;">ISO Class 7</td><td style="border: 1px solid #ccc; padding: 10px;"></td><td style="border: 1px solid #ccc; padding: 10px;"></td><td style="border: 1px solid #ccc; padding: 10px;"></td><td style="border: 1px solid #ccc; padding: 10px; text-align: center;">352,000</td><td style="border: 1px solid #ccc; padding: 10px; text-align: center;">83,200</td><td style="border: 1px solid #ccc; padding: 10px; text-align: center;">2,930</td></tr>
      <tr><td style="border: 1px solid #ccc; padding: 10px; font-weight: bold;">ISO Class 8</td><td style="border: 1px solid #ccc; padding: 10px;"></td><td style="border: 1px solid #ccc; padding: 10px;"></td><td style="border: 1px solid #ccc; padding: 10px;"></td><td style="border: 1px solid #ccc; padding: 10px; text-align: center;">3,520,000</td><td style="border: 1px solid #ccc; padding: 10px; text-align: center;">832,000</td><td style="border: 1px solid #ccc; padding: 10px; text-align: center;">29,300</td></tr>
      <tr><td style="border: 1px solid #ccc; padding: 10px; font-weight: bold;">ISO Class 9</td><td style="border: 1px solid #ccc; padding: 10px;"></td><td style="border: 1px solid #ccc; padding: 10px;"></td><td style="border: 1px solid #ccc; padding: 10px;"></td><td style="border: 1px solid #ccc; padding: 10px; text-align: center;">35,200,000</td><td style="border: 1px solid #ccc; padding: 10px; text-align: center;">8,320,000</td><td style="border: 1px solid #ccc; padding: 10px; text-align: center;">293,000</td></tr>
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  </table>
</div>[\/vc_raw_html][\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row][vc_row type=&#8221;in_container&#8221; full_screen_row_position=&#8221;middle&#8221; column_margin=&#8221;default&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; scene_position=&#8221;center&#8221; text_color=&#8221;dark&#8221; text_align=&#8221;left&#8221; row_border_radius=&#8221;none&#8221; row_border_radius_applies=&#8221;bg&#8221; overflow=&#8221;visible&#8221; id=&#8221;2&#8243; overlay_strength=&#8221;0.3&#8243; gradient_direction=&#8221;left_to_right&#8221; shape_divider_position=&#8221;bottom&#8221; bg_image_animation=&#8221;none&#8221; gradient_type=&#8221;default&#8221; shape_type=&#8221;&#8221;][vc_column column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; column_position=&#8221;default&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/1&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]\n<h2><strong>Air Filtration in Cleanrooms<\/strong><\/h2>\n[\/vc_column_text][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]<span style=\"font-weight: 400;\">To meet such stringent requirements, it is necessary to provide for <\/span><b>high air exchange rates<\/b><span style=\"font-weight: 400;\"> and <\/span><b>high filtration efficiency<\/b><span style=\"font-weight: 400;\">. The  <\/span><b>filtration classes<\/b><span style=\"font-weight: 400;\"> of the filters are governed by <\/span><b>several standards<\/b><span style=\"font-weight: 400;\">, but filters can be divided into four groups:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Filters <\/span><b>coarse<\/b><span style=\"font-weight: 400;\">;<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Filters <\/span><b>medium<\/b><span style=\"font-weight: 400;\">;<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Filters <\/span><b>Fine<\/b><span style=\"font-weight: 400;\">;<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Filters <\/span><b>Absolute<\/b><span style=\"font-weight: 400;\">.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">A <\/span><b>cleanroom<\/b><span style=\"font-weight: 400;\"> requires <\/span><b>absolute filters<\/b><span style=\"font-weight: 400;\">, usually called <\/span><b>HEPA <\/b><b>HEPA<\/b><span style=\"font-weight: 400;\"> (High Efficiency Particulate Air filters) or <\/span><b>ULPA<\/b><span style=\"font-weight: 400;\"> (Ultra Low Penetration Airfilters), depending on their <\/span><b>filtration efficiency<\/b><span style=\"font-weight: 400;\">. The requirements of the  <\/span><b>Absolute filters<\/b><span style=\"font-weight: 400;\"> are specified by <\/span><b>UNI EN 1822-1<\/b><span style=\"font-weight: 400;\">, which illustrates the difference between a<\/span><b>overall efficiency<\/b><span style=\"font-weight: 400;\"> and a <\/span><b>local <\/b><span style=\"font-weight: 400;\">efficiencyof the filter.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Efficiency also depends on the <\/span><b>the larger size<\/b><span style=\"font-weight: 400;\"> of the <\/span><b>penetrating particle<\/b><span style=\"font-weight: 400;\">, that is, the <\/span><b>Most Penetrating Particle Size<\/b><span style=\"font-weight: 400;\">, abbreviated as <\/span><b>MPPS<\/b><span style=\"font-weight: 400;\">. As of today, the  <\/span><b>MPPS<\/b><span style=\"font-weight: 400;\"> has reached values close to <\/span><b>0.08 \u00b5m<\/b><span style=\"font-weight: 400;\"> thanks to next-generation materials.<\/span><\/p>\n<table>\n<tbody>\n<tr>\n<td><b>Filtration Type<\/b><\/td>\n<td><b>Filtration class EN 779<\/b><\/td>\n<td><b>Efficiency<\/b><\/td>\n<\/tr>\n<tr>\n<td rowspan=\"4\"><b>Coarse filters<\/b><\/td>\n<td><span style=\"font-weight: 400;\">G1<\/span><\/td>\n<td><span style=\"font-weight: 400;\">&lt;, 65<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">G2<\/span><\/td>\n<td><span style=\"font-weight: 400;\">65 \u2264 Am &lt; 80<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">G3<\/span><\/td>\n<td><span style=\"font-weight: 400;\">80 \u2264 Am &lt; 90<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">G4<\/span><\/td>\n<td><span style=\"font-weight: 400;\">90 \u2264 Am<\/span><\/td>\n<\/tr>\n<tr>\n<td rowspan=\"5\"><b>Medium and Fine Filters<\/b><\/td>\n<td><span style=\"font-weight: 400;\">M5<\/span><\/td>\n<td><span style=\"font-weight: 400;\">40&lt;Em&lt;60<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">M6<\/span><\/td>\n<td><span style=\"font-weight: 400;\">60 \u2264 Em&lt;80<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">F7<\/span><\/td>\n<td><span style=\"font-weight: 400;\">80 \u2264 Em&lt;90<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">F8<\/span><\/td>\n<td><span style=\"font-weight: 400;\">90 \u2264 Em&lt;, 95<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">F9<\/span><\/td>\n<td><span style=\"font-weight: 400;\">95 \u2264 Em<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\"> <\/span><\/td>\n<td><b>Filtration Class EN 1822<\/b><\/td>\n<td><b>Overall Efficiency<\/b><\/td>\n<\/tr>\n<tr>\n<td rowspan=\"5\"><b>HEPA Absolute Filters<\/b><\/td>\n<td><span style=\"font-weight: 400;\">H10<\/span><\/td>\n<td><span style=\"font-weight: 400;\">85\u2264Eg<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">H11<\/span><\/td>\n<td><span style=\"font-weight: 400;\">95 \u2264 Eg<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">H12<\/span><\/td>\n<td><span style=\"font-weight: 400;\">99.5 \u2264 Eg<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">H13<\/span><\/td>\n<td><span style=\"font-weight: 400;\">99.95 \u2264 Eg<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">H14<\/span><\/td>\n<td><span style=\"font-weight: 400;\">99.995 \u2264 Eg<\/span><\/td>\n<\/tr>\n<tr>\n<td rowspan=\"3\"><b>ULPA Absolute Filters<\/b><\/td>\n<td><span style=\"font-weight: 400;\">U15<\/span><\/td>\n<td><span style=\"font-weight: 400;\">99.9995 \u2264 Eg<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">U16<\/span><\/td>\n<td><span style=\"font-weight: 400;\">99.99995 \u2264 Eg<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">U17<\/span><\/td>\n<td><span style=\"font-weight: 400;\">99.999995 \u2264 Eg<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n[\/vc_column_text][\/vc_column][\/vc_row][vc_row type=&#8221;in_container&#8221; full_screen_row_position=&#8221;middle&#8221; column_margin=&#8221;default&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; scene_position=&#8221;center&#8221; text_color=&#8221;dark&#8221; text_align=&#8221;left&#8221; row_border_radius=&#8221;none&#8221; row_border_radius_applies=&#8221;bg&#8221; overflow=&#8221;visible&#8221; id=&#8221;3&#8243; overlay_strength=&#8221;0.3&#8243; gradient_direction=&#8221;left_to_right&#8221; shape_divider_position=&#8221;bottom&#8221; bg_image_animation=&#8221;none&#8221; gradient_type=&#8221;default&#8221; shape_type=&#8221;&#8221;][vc_column column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; column_position=&#8221;default&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/1&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]\n<h2><strong>Types of Ventilation and Air Exchange Rates<\/strong><\/h2>\n[\/vc_column_text][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]<span style=\"font-weight: 400;\">The <\/span><b>airflows<\/b><span style=\"font-weight: 400;\"> in a <\/span><b>cleanroom<\/b><span style=\"font-weight: 400;\"> can be of two types:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Turbulent<\/b><span style=\"font-weight: 400;\">: the air comes  <\/span><b>admitted through vents<\/b><span style=\"font-weight: 400;\">  creating a  <\/span><b>turbulent flow<\/b><span style=\"font-weight: 400;\">  which dilutes the  <\/span><b>contaminants<\/b><span style=\"font-weight: 400;\">  and then it becomes  <\/span><b>excerpt from the grids<\/b><span style=\"font-weight: 400;\">  of shots placed in the sections  <\/span><b>low<\/b><span style=\"font-weight: 400;\">  of the  <\/span><b>walls<\/b><span style=\"font-weight: 400;\">  (from  <\/span><b>ISO 6<\/b><span style=\"font-weight: 400;\">  to  <\/span><b>ISO 9<\/b><span style=\"font-weight: 400;\">) or to  <\/span><b>ceiling<\/b><span style=\"font-weight: 400;\">  (<\/span><b>ISO 8<\/b><span style=\"font-weight: 400;\">  and  <\/span><b>ISO 9<\/b><span style=\"font-weight: 400;\">).<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Vertical laminar flow<\/b><span style=\"font-weight: 400;\">: In this configuration, the airflow always comes from the <\/span><b>suspended ceiling<\/b><span style=\"font-weight: 400;\"> but in an almost <\/span><b>uniform<\/b><span style=\"font-weight: 400;\"> (the filter modules must cover at least<\/span><b>80%<\/b><span style=\"font-weight: 400;\"> of the <\/span><b>surface of the suspended ceiling<\/b><span style=\"font-weight: 400;\">) in order to be <\/span><b>pushed downward<\/b><span style=\"font-weight: 400;\">  by the so-called \u201cpiston effect\u201d and be extracted at the level of the floating floor. In this configuration, the floor consists of   <\/span><b>perforated tiles<\/b><span style=\"font-weight: 400;\"> to allow air to flow through the entire <\/span><b>floor surface<\/b><span style=\"font-weight: 400;\">.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Horizontal laminar flow<\/b><span style=\"font-weight: 400;\">: This type is similar to the previous one, but the<\/span><b>air<\/b><span style=\"font-weight: 400;\"> is introduced through a <\/span><b>wall equipped with filter modules<\/b><span style=\"font-weight: 400;\"> and <\/span><b>extracted from the opposite wall<\/b><span style=\"font-weight: 400;\"> consisting of <\/span><b>return grilles<\/b><span style=\"font-weight: 400;\">.<\/span><\/li>\n<\/ul>\n[\/vc_column_text][divider line_type=&#8221;No Line&#8221; custom_height=&#8221;10&#8243;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]<span style=\"font-weight: 400;\">From left to right: a turbulent-flow cleanroom, a vertical laminar-flow cleanroom, and a horizontal laminar-flow cleanroom.<\/span>[\/vc_column_text][vc_row_inner equal_height=&#8221;yes&#8221; column_margin=&#8221;default&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; text_align=&#8221;left&#8221; row_position=&#8221;default&#8221; row_position_tablet=&#8221;inherit&#8221; row_position_phone=&#8221;inherit&#8221; overflow=&#8221;visible&#8221; pointer_events=&#8221;all&#8221;][vc_column_inner column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; overflow=&#8221;visible&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/3&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221;][image_with_animation image_url=&#8221;17337&#8243; image_size=&#8221;full&#8221; max_width=&#8221;100%&#8221; max_width_mobile=&#8221;default&#8221; animation_type=&#8221;entrance&#8221; animation=&#8221;None&#8221; animation_movement_type=&#8221;transform_y&#8221; hover_animation=&#8221;none&#8221; alignment=&#8221;&#8221; border_radius=&#8221;15px&#8221; box_shadow=&#8221;none&#8221; image_loading=&#8221;default&#8221;][\/vc_column_inner][vc_column_inner column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; overflow=&#8221;visible&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/3&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221;][image_with_animation image_url=&#8221;17333&#8243; image_size=&#8221;full&#8221; max_width=&#8221;75%&#8221; max_width_mobile=&#8221;default&#8221; animation_type=&#8221;entrance&#8221; animation=&#8221;None&#8221; animation_movement_type=&#8221;transform_y&#8221; hover_animation=&#8221;none&#8221; alignment=&#8221;&#8221; border_radius=&#8221;15px&#8221; box_shadow=&#8221;none&#8221; image_loading=&#8221;default&#8221;][\/vc_column_inner][vc_column_inner column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; overflow=&#8221;visible&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/3&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221;][image_with_animation image_url=&#8221;17335&#8243; image_size=&#8221;full&#8221; max_width=&#8221;75%&#8221; max_width_mobile=&#8221;default&#8221; animation_type=&#8221;entrance&#8221; animation=&#8221;None&#8221; animation_movement_type=&#8221;transform_y&#8221; hover_animation=&#8221;none&#8221; alignment=&#8221;&#8221; border_radius=&#8221;15px&#8221; box_shadow=&#8221;none&#8221; image_loading=&#8221;default&#8221;][\/vc_column_inner][\/vc_row_inner][divider line_type=&#8221;No Line&#8221; custom_height=&#8221;10&#8243;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]<span style=\"font-weight: 400;\">The <\/span><b>laminar flow ventilation<\/b><span style=\"font-weight: 400;\"> is required for <\/span><b>classrooms<\/b><span style=\"font-weight: 400;\"> with <\/span><b>the most stringent requirements<\/b><span style=\"font-weight: 400;\">\u2014namely, <\/span><b>ISO Class 1<\/b><span style=\"font-weight: 400;\"> to <\/span><b>ISO 5<\/b><span style=\"font-weight: 400;\"> , while the remaining <\/span><b>ISO<\/b><span style=\"font-weight: 400;\"> have a <\/span><b>turbulent flow<\/b><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p>Another essential factor in <b>preventing contamination<\/b> is the presence of a <b>differential pressure<\/b> typically ranging from <b>5<\/b> to <b>20<\/b> <b>Pa<\/b>: this pressure difference is necessary to maintain <b>positive pressure<\/b> in the <b>cleanroom<\/b> and ensure that <b>any airflows<\/b> caused<b>by opening<\/b> the <b>doors<\/b> always carry<b>air out of the cleanroom<\/b> and <b>never into it<\/b>.<\/p>\n<p><span style=\"font-weight: 400;\">In the event that, prior to the  <\/span><b>clean room<\/b><span style=\"font-weight: 400;\">  there is a  <\/span><b>gray room<\/b><span style=\"font-weight: 400;\">, this must have a  <\/span><b>positive pressure<\/b><span style=\"font-weight: 400;\">  compared to the<\/span><b>exterior<\/b><span style=\"font-weight: 400;\">  (for example  <\/span><b>5 Pa<\/b><span style=\"font-weight: 400;\">) but anyway  <\/span><b>lower than the adjacent cleanroom<\/b><span style=\"font-weight: 400;\">  (which will be at  <\/span><b>15\u201320 Pa<\/b><span style=\"font-weight: 400;\">) in order to create a  <\/span><b>pressure drop<\/b><span style=\"font-weight: 400;\">  that prevents entry into the  <\/span><b>cleanroom with contaminated air<\/b><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The most distinctive features listed in this article are summarized in the following table, which also lists the sectors where this type of structure is most in demand.<\/span>[\/vc_column_text][vc_raw_html css=&#8221;&#8221;]<div style="overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 20px 0;">
  <table style="border-collapse: collapse; width: 100%; font-family: sans-serif; font-size: 13px; line-height: 1.4; border: 1px solid #ccc;">
    <thead>
      <tr style="background-color: #f2f2f2; font-weight: bold;">
        <th style="border: 1px solid #ccc; padding: 12px 8px; text-align: center; white-space: nowrap;">Class</th>
        <th style="border: 1px solid #ccc; padding: 12px 8px; text-align: center; min-width: 150px;">Concentration of particles larger than 0.1 µm per cubic meter</th>
        <th style="border: 1px solid #ccc; padding: 12px 8px; text-align: center; min-width: 120px;">Airflow</th>
        <th style="border: 1px solid #ccc; padding: 12px 8px; text-align: center; min-width: 100px;">Filters</th>
        <th style="border: 1px solid #ccc; padding: 12px 8px; text-align: center; min-width: 140px;">Air changes [vol/h] - air velocity [m/s]</th>
        <th style="border: 1px solid #ccc; padding: 12px 8px; text-align: center; min-width: 90px;">Ceiling coverage [%]</th>
        <th style="border: 1px solid #ccc; padding: 12px 8px; text-align: center; min-width: 150px;">Applications</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td style="border: 1px solid #ccc; padding: 10px; font-weight: bold; white-space: nowrap;">ISO Class 1</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">10</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">Unidirectional laminate</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">ULPA U15</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">0.3–0.5 m/s</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">>90%</td>
        <td style="border: 1px solid #ccc; padding: 10px;">Nanotechnology, Advanced Semiconductors</td>
      </tr>
      <tr style="background-color: #fafafa;">
        <td style="border: 1px solid #ccc; padding: 10px; font-weight: bold; white-space: nowrap;">ISO Class 2</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">100</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">Unidirectional laminate</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">ULPA</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">0.3–0.5 m/s</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">>90%</td>
        <td style="border: 1px solid #ccc; padding: 10px;">Microchip</td>
      </tr>
      <tr>
        <td style="border: 1px solid #ccc; padding: 10px; font-weight: bold; white-space: nowrap;">ISO Class 3</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">1.000</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">Unidirectional laminate</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">ULPA</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">0.3–0.5 m/s</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">>90%</td>
        <td style="border: 1px solid #ccc; padding: 10px;">Aerospace</td>
      </tr>
      <tr style="background-color: #fafafa;">
        <td style="border: 1px solid #ccc; padding: 10px; font-weight: bold; white-space: nowrap;">ISO Class 4</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">10.000</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">Unidirectional laminate</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">ULPA/HEPA</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">0.3–0.5 m/s</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">>90%</td>
        <td style="border: 1px solid #ccc; padding: 10px;">Precision Optics</td>
      </tr>
      <tr>
        <td style="border: 1px solid #ccc; padding: 10px; font-weight: bold; white-space: nowrap;">ISO Class 5</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">100.000</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">Unidirectional laminate</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">HEPA H14 - ULPA</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">0.2–0.5 m/s</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">>80%</td>
        <td style="border: 1px solid #ccc; padding: 10px;">Sterile Pharmaceutical Products, Operating Rooms</td>
      </tr>
      <tr style="background-color: #fafafa;">
        <td style="border: 1px solid #ccc; padding: 10px; font-weight: bold; white-space: nowrap;">ISO Class 6</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">1.000.000</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">Turbulent</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">HEPA H14</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">70–160 vol/h</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">30-50%</td>
        <td style="border: 1px solid #ccc; padding: 10px;">Medical Devices</td>
      </tr>
      <tr>
        <td style="border: 1px solid #ccc; padding: 10px; font-weight: bold; white-space: nowrap;">ISO Class 7</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">352,000 (from 0.5 µm)</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">Turbulent</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">HEPA H13-14</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">30–70 vol/h</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">15-20%</td>
        <td style="border: 1px solid #ccc; padding: 10px;">Workshops</td>
      </tr>
      <tr style="background-color: #fafafa;">
        <td style="border: 1px solid #ccc; padding: 10px; font-weight: bold; white-space: nowrap;">ISO Class 8</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">3,520,000 (from 0.5 µm)</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">Turbulent</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">HEPA H13</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">10–20 vol/h</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">5-10%</td>
        <td style="border: 1px solid #ccc; padding: 10px;">Non-sterile pharmaceuticals</td>
      </tr>
      <tr>
        <td style="border: 1px solid #ccc; padding: 10px; font-weight: bold; white-space: nowrap;">ISO Class 9</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">35,200,000 (from 0.5 µm)</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">Standard</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">Pre-filters</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;"><10 vol/h</td>
        <td style="border: 1px solid #ccc; padding: 10px; text-align: center;">/</td>
        <td style="border: 1px solid #ccc; padding: 10px;">Utility Corridors, Transit Areas</td>
      </tr>
    </tbody>
  </table>
</div>[\/vc_raw_html][\/vc_column][\/vc_row][vc_row type=&#8221;in_container&#8221; full_screen_row_position=&#8221;middle&#8221; column_margin=&#8221;default&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; scene_position=&#8221;center&#8221; text_color=&#8221;dark&#8221; text_align=&#8221;left&#8221; row_border_radius=&#8221;none&#8221; row_border_radius_applies=&#8221;bg&#8221; overflow=&#8221;visible&#8221; id=&#8221;4&#8243; overlay_strength=&#8221;0.3&#8243; gradient_direction=&#8221;left_to_right&#8221; shape_divider_position=&#8221;bottom&#8221; bg_image_animation=&#8221;none&#8221; gradient_type=&#8221;default&#8221; shape_type=&#8221;&#8221;][vc_column column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; column_position=&#8221;default&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/1&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]\n<h2><strong>FAQ<\/strong><\/h2>\n[\/vc_column_text][toggles style=&#8221;default&#8221; border_radius=&#8221;none&#8221;][toggle color=&#8221;Default&#8221; heading_tag=&#8221;default&#8221; heading_tag_functionality=&#8221;default&#8221; title=&#8221;What are cleanrooms?&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]<span style=\"font-weight: 400;\">A <\/span><b>clean room<\/b><span style=\"font-weight: 400;\">, known in English as \u201c<\/span><b>cleanroom<\/b><span style=\"font-weight: 400;\">,\u201d is an area characterized by strict <\/span><b>cleanliness requirements<\/b><span style=\"font-weight: 400;\"> and <\/span><b>air control<\/b><span style=\"font-weight: 400;\"> in order to <\/span><b>prevent contamination of the products<\/b><span style=\"font-weight: 400;\"> or the items contained therein.<\/span>[\/vc_column_text][\/toggle][toggle color=&#8221;Default&#8221; heading_tag=&#8221;default&#8221; heading_tag_functionality=&#8221;default&#8221; title=&#8221;How many and what are the filtration classes for cleanrooms?&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]<span style=\"font-weight: 400;\">The standard <\/span><b>ISO 14644-1<\/b><span style=\"font-weight: 400;\"> establishes a classification system for <\/span><b>cleanrooms<\/b><span style=\"font-weight: 400;\"> based on <\/span><b>concentration per m\u00b3 <\/b><span style=\"font-weight: 400;\">of <\/span><b>particulate matter in the air<\/b><span style=\"font-weight: 400;\">, covering <\/span><b>9 cleanroom classes ranging from ISO 1 (most efficient) to ISO 9 (least efficient)<\/b><span style=\"font-weight: 400;\">.<\/span>[\/vc_column_text][\/toggle][\/toggles][\/vc_column][\/vc_row][vc_row type=&#8221;in_container&#8221; full_screen_row_position=&#8221;middle&#8221; column_margin=&#8221;default&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; scene_position=&#8221;center&#8221; text_color=&#8221;dark&#8221; text_align=&#8221;left&#8221; row_border_radius=&#8221;none&#8221; row_border_radius_applies=&#8221;bg&#8221; overflow=&#8221;visible&#8221; id=&#8221;5&#8243; overlay_strength=&#8221;0.3&#8243; gradient_direction=&#8221;left_to_right&#8221; shape_divider_position=&#8221;bottom&#8221; bg_image_animation=&#8221;none&#8221; gradient_type=&#8221;default&#8221; shape_type=&#8221;&#8221;][vc_column column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; column_position=&#8221;default&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/1&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]\n<h2><strong>The Enertech Solution Method for Addressing Critical Issues in Cleanrooms<\/strong><\/h2>\n[\/vc_column_text][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]<span style=\"font-weight: 400;\">Cleanroom efficiency requires integrated expertise in <\/span><b>ISO classification, air filtration, ventilation, air changes, and pressure control<\/b><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Enertech Solution supports companies and organizations through a <\/span><b>proven method based on technical analysis, plant design, and verification of regulatory requirements<\/b><span style=\"font-weight: 400;\">, taking a structured approach to addressing <\/span><b>challenges associated<\/b><span style=\"font-weight: 400;\"> energy<\/span><b>energy efficiency<\/b><span style=\"font-weight: 400;\"> and <\/span><b>environmental monitoring<\/b><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The Enertech method begins with an analysis of production needs and cleaning requirements, and continues with the <\/span><b>definition of the most suitable plant engineering solutions<\/b><span style=\"font-weight: 400;\"> (ventilation, filtration, air changes, and differential pressures) and concludes with ongoing technical support aimed at ensuring <\/span><b>performance, reliability, and regulatory compliance<\/b><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">For more information <\/span><a href=\"https:\/\/www.enertechsolution.it\/en\/contact\/\"><span style=\"font-weight: 400;\">please contact<\/span><\/a><span style=\"font-weight: 400;\"> our Enertech Solution team.<\/span>[\/vc_column_text][\/vc_column][\/vc_row][vc_row type=&#8221;in_container&#8221; full_screen_row_position=&#8221;middle&#8221; column_margin=&#8221;default&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; scene_position=&#8221;center&#8221; text_color=&#8221;dark&#8221; text_align=&#8221;left&#8221; row_border_radius=&#8221;none&#8221; row_border_radius_applies=&#8221;bg&#8221; overflow=&#8221;visible&#8221; overlay_strength=&#8221;0.3&#8243; gradient_direction=&#8221;left_to_right&#8221; shape_divider_position=&#8221;bottom&#8221; bg_image_animation=&#8221;none&#8221;][vc_column column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; 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