<div class='ui dimmer modals page' style='display: none;'><div id='helpie-password-modal' class='pauple_helpie ui modal small' style='display: none;'><div class='ui header'><i class='circular lock icon'></i> Password Protected</div><div class='item-content'><br /><label for='password_check'>Enter Password : </label><p><input type='password' id='password_check' name='password_check' class='password' value='' required></p></div><div class='actions'><div class='ui black deny button'>Nope</div><div class='ui positive right labeled icon button'>Yep, that's right!<i class='checkmark icon'></i></div></div><div class='clear'></div></div></div>{"id":4315,"date":"2025-06-13T20:16:48","date_gmt":"2025-06-13T12:16:48","guid":{"rendered":"https:\/\/smartairfilters.com\/learn\/smart-air-knowledge-base\/does-an-air-purifier-have-to-be-turned-on-24-7\/"},"modified":"2025-06-13T20:16:52","modified_gmt":"2025-06-13T12:16:52","slug":"does-an-air-purifier-have-to-be-turned-on-24-7","status":"publish","type":"pauple_helpie","link":"https:\/\/smartairfilters.com\/learn\/smart-air-knowledge-base\/does-an-air-purifier-have-to-be-turned-on-24-7\/","title":{"rendered":"Does an Air Purifier Have to Be Turned on 24\/7?"},"content":{"rendered":"<div class='breadcrumbs pauple_helpie_breadcrumbs'><a class='mainpage-link' href='https:\/\/smartairfilters.com\/learn\/'>Knowledge Base<\/a> <span class='helpiekb_separator'> &nbsp;&nbsp; <i class='fa fa-angle-right' aria-hidden='true'><\/i>&nbsp;&nbsp;<\/span><a class='mainpage-link' href='https:\/\/smartairfilters.com\/learn\/cat\/protecting-yourself\/'>Protecting Yourself<\/a> <span class='helpiekb_separator'> &nbsp;&nbsp; <i class='fa fa-angle-right' aria-hidden='true'><\/i>&nbsp;&nbsp;<\/span><a class='mainpage-link' href='https:\/\/smartairfilters.com\/learn\/cat\/air-purifiers\/'>Air Purifiers<\/a> <span class='helpiekb_separator'> &nbsp;&nbsp; <i class='fa fa-angle-right' aria-hidden='true'><\/i>&nbsp;&nbsp;<\/span><a class='mainpage-link' href='https:\/\/smartairfilters.com\/learn\/smart-air-knowledge-base\/does-an-air-purifier-have-to-be-turned-on-24-7\/'>Does an Air Purifier Have to Be Turned on 24\/7?<\/a> <\/div><p><span style=\"font-weight: 400;\">We recommend keeping your air purifier on whenever you are at home and outdoor PM2.5 is above the WHO annual limit. We did a real-life test by running a purifier in a bedroom set on a timer to turn on every day for two hours and then off again. The tests showed two things:\u00a0<\/span><\/p>\n<ol>\n<li><span style=\"font-weight: 400;\"> The air got clean quickly. This suggests it\u2019s OK to turn your air purifier on when you get home. You don\u2019t have to leave it on while you\u2019re away.\u00a0<\/span><\/li>\n<li><span style=\"font-weight: 400;\"> After turning off, the air got dirty again very quickly. That\u2019s despite the fact that the doors and windows were closed. Outdoor air is constantly getting into our homes, even though we can\u2019t see it. So we recommend keeping your purifier on while sleeping or whenever someone is at home.\u00a0<\/span><\/li>\n<\/ol>\n<p><span style=\"font-weight: 400;\">You can read more about the test here:\u00a0<\/span><a href=\"https:\/\/smartairfilters.com\/en\/blog\/do-you-have-to-run-your-purifier-all-day\/\"><span style=\"font-weight: 400;\">https:\/\/smartairfilters.com\/en\/blog\/do-you-have-to-run-your-purifier-all-day\/<\/span><\/a><\/p>\n<div class='pauple-helpie-module article-voting'><span class='label'>Was this article useful?<\/span><span data-post-id='4315' data-user-id='0' class='icon-tray'><span  data-vote='thumbs up outline' class=' voting-icon thumbs up outline '><i data-content='thumbs up outline' class='thumbs up outline outline icon' aria-hidden='true'><\/i><count>3<\/count><\/span><span  data-vote='thumbs down outline' class=' voting-icon thumbs down outline '><i data-content='thumbs down outline' class='thumbs down outline outline icon' aria-hidden='true'><\/i><count>0<\/count><\/span><\/span><\/div><div style='clear:both;'><\/div>","protected":false},"excerpt":{"rendered":"<p>Knowledge Base &nbsp;&nbsp; &nbsp;&nbsp;Protecting Yourself &nbsp;&nbsp; &nbsp;&nbsp;Air Purifiers &nbsp;&nbsp; &nbsp;&nbsp;Does an Air Purifier Have to Be Turned on 24\/7? We recommend keeping your air purifier on whenever you are at home and outdoor PM2.5 is above the WHO annual limit. We did a real-life test by running a purifier in &#8230; <a title=\"Does an Air Purifier Have to Be Turned on 24\/7?\" class=\"read-more\" href=\"https:\/\/smartairfilters.com\/learn\/smart-air-knowledge-base\/does-an-air-purifier-have-to-be-turned-on-24-7\/\" aria-label=\"Read more about Does an Air Purifier Have to Be Turned on 24\/7?\">Read more<\/a><\/p>\n","protected":false},"author":4824,"featured_media":0,"menu_order":0,"comment_status":"closed","ping_status":"open","template":"","format":"standard","meta":{"_relevanssi_hide_post":"","_relevanssi_hide_content":"","_relevanssi_pin_for_all":"","_relevanssi_pin_keywords":"","_relevanssi_unpin_keywords":"","_relevanssi_related_keywords":"","_relevanssi_related_include_ids":"","_relevanssi_related_exclude_ids":"","_relevanssi_related_no_append":"","_relevanssi_related_not_related":"","_relevanssi_related_posts":"","_relevanssi_noindex_reason":"","footnotes":""},"helpdesk_category":[673],"helpie_tag":[311,556,411,366,840,350,555],"helpie_add_tag":[],"helpie_up_tag":[],"class_list":["post-4315","pauple_helpie","type-pauple_helpie","status-publish","format-standard","hentry","helpdesk_category-air-purifiers","helpie_tag-home","helpie_tag-off","helpie_tag-on","helpie_tag-purifier","helpie_tag-sleeping","helpie_tag-time","helpie_tag-turn"],"_links":{"self":[{"href":"https:\/\/smartairfilters.com\/learn\/wp-json\/wp\/v2\/pauple_helpie\/4315","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/smartairfilters.com\/learn\/wp-json\/wp\/v2\/pauple_helpie"}],"about":[{"href":"https:\/\/smartairfilters.com\/learn\/wp-json\/wp\/v2\/types\/pauple_helpie"}],"author":[{"embeddable":true,"href":"https:\/\/smartairfilters.com\/learn\/wp-json\/wp\/v2\/users\/4824"}],"replies":[{"embeddable":true,"href":"https:\/\/smartairfilters.com\/learn\/wp-json\/wp\/v2\/comments?post=4315"}],"version-history":[{"count":6,"href":"https:\/\/smartairfilters.com\/learn\/wp-json\/wp\/v2\/pauple_helpie\/4315\/revisions"}],"predecessor-version":[{"id":6049,"href":"https:\/\/smartairfilters.com\/learn\/wp-json\/wp\/v2\/pauple_helpie\/4315\/revisions\/6049"}],"wp:attachment":[{"href":"https:\/\/smartairfilters.com\/learn\/wp-json\/wp\/v2\/media?parent=4315"}],"wp:term":[{"taxonomy":"helpdesk_category","embeddable":true,"href":"https:\/\/smartairfilters.com\/learn\/wp-json\/wp\/v2\/helpdesk_category?post=4315"},{"taxonomy":"helpie_tag","embeddable":true,"href":"https:\/\/smartairfilters.com\/learn\/wp-json\/wp\/v2\/helpie_tag?post=4315"},{"taxonomy":"helpie_add_tag","embeddable":true,"href":"https:\/\/smartairfilters.com\/learn\/wp-json\/wp\/v2\/helpie_add_tag?post=4315"},{"taxonomy":"helpie_up_tag","embeddable":true,"href":"https:\/\/smartairfilters.com\/learn\/wp-json\/wp\/v2\/helpie_up_tag?post=4315"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}