<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":5449,"date":"2021-04-01T09:59:12","date_gmt":"2021-04-01T01:59:12","guid":{"rendered":"https:\/\/smartairfilters.com\/learn\/?post_type=pauple_helpie&#038;p=5449"},"modified":"2021-04-01T09:59:56","modified_gmt":"2021-04-01T01:59:56","slug":"fresh-air-hvac-improve-indoor-air","status":"publish","type":"pauple_helpie","link":"https:\/\/smartairfilters.com\/learn\/smart-air-knowledge-base\/fresh-air-hvac-improve-indoor-air\/","title":{"rendered":"Can &#8216;fresh air&#8217; or HVAC Systems Improve my Indoor Air?"},"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\/smart-air-knowledge-base\/fresh-air-hvac-improve-indoor-air\/'>Can 'fresh air' or HVAC Systems Improve my Indoor Air?<\/a> <\/div>\n<p>Fresh air systems, or HVAC systems that have a fresh air intake can help improve indoor air quality in certain circumstances. When indoor air has high levels of VOCs or gas build up, for example from recent remodelling, smoking, cooking etc. then fresh air systems can help by bringing in new, cleaner air from outside to dilute the pollutants.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><img decoding=\"async\" src=\"https:\/\/smartairfilters.com\/wordpress\/wp-content\/uploads\/sites\/9\/2021\/04\/fresh-air-hvac-system-gases-pollutants-1024x576.jpg\" alt=\"\" class=\"wp-image-5450\" width=\"600\" srcset=\"https:\/\/smartairfilters.com\/wordpress\/wp-content\/uploads\/sites\/9\/2021\/04\/fresh-air-hvac-system-gases-pollutants-1024x576.jpg 1024w, https:\/\/smartairfilters.com\/wordpress\/wp-content\/uploads\/sites\/9\/2021\/04\/fresh-air-hvac-system-gases-pollutants-300x169.jpg 300w, https:\/\/smartairfilters.com\/wordpress\/wp-content\/uploads\/sites\/9\/2021\/04\/fresh-air-hvac-system-gases-pollutants-768x432.jpg 768w, https:\/\/smartairfilters.com\/wordpress\/wp-content\/uploads\/sites\/9\/2021\/04\/fresh-air-hvac-system-gases-pollutants-1536x864.jpg 1536w, https:\/\/smartairfilters.com\/wordpress\/wp-content\/uploads\/sites\/9\/2021\/04\/fresh-air-hvac-system-gases-pollutants.jpg 1920w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n\n<p><\/p>\n\n\n\n<p>However, fresh air systems or fresh air intakes may have a negative effect when outdoor air is more polluted than indoor air. This is common in highly polluted areas, or for buildings close to major pollution sources (such as roads, factories etc.). In this situation, using a fresh air system may in fact bring polluted air into the room, causing the indoor air quality levels to deteriorate. In this situation, a filtered fresh air system, that first filters particulate (PM2.5, PM10 etc.) from the air can be used.<\/p>\n\n\n\n<p><a href=\"https:\/\/smartairfilters.com\/en\/product-category\/hepa-filters\/\">Learn more about our range of simple, no-nonsense HEPA filters \u00bb<\/a><\/p>\n<div class='pauple-helpie-module article-voting'><span class='label'>Was this article useful?<\/span><span data-post-id='5449' 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>0<\/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;Can &#8216;fresh air&#8217; or HVAC Systems Improve my Indoor Air? Fresh air systems, or HVAC systems that have a fresh air intake can help improve indoor air quality in certain circumstances. When indoor air has high levels of VOCs or gas build up, for &#8230; <a title=\"Can &#8216;fresh air&#8217; or HVAC Systems Improve my Indoor Air?\" class=\"read-more\" href=\"https:\/\/smartairfilters.com\/learn\/smart-air-knowledge-base\/fresh-air-hvac-improve-indoor-air\/\" aria-label=\"Read more about Can &#8216;fresh air&#8217; or HVAC Systems Improve my Indoor Air?\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","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":[613],"helpie_tag":[1304,1264,481,233],"helpie_add_tag":[],"helpie_up_tag":[],"class_list":["post-5449","pauple_helpie","type-pauple_helpie","status-publish","format-standard","hentry","helpdesk_category-protecting-yourself","helpie_tag-fresh-air","helpie_tag-hvac","helpie_tag-indoor","helpie_tag-voc"],"_links":{"self":[{"href":"https:\/\/smartairfilters.com\/learn\/wp-json\/wp\/v2\/pauple_helpie\/5449","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\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/smartairfilters.com\/learn\/wp-json\/wp\/v2\/comments?post=5449"}],"version-history":[{"count":1,"href":"https:\/\/smartairfilters.com\/learn\/wp-json\/wp\/v2\/pauple_helpie\/5449\/revisions"}],"predecessor-version":[{"id":5451,"href":"https:\/\/smartairfilters.com\/learn\/wp-json\/wp\/v2\/pauple_helpie\/5449\/revisions\/5451"}],"wp:attachment":[{"href":"https:\/\/smartairfilters.com\/learn\/wp-json\/wp\/v2\/media?parent=5449"}],"wp:term":[{"taxonomy":"helpdesk_category","embeddable":true,"href":"https:\/\/smartairfilters.com\/learn\/wp-json\/wp\/v2\/helpdesk_category?post=5449"},{"taxonomy":"helpie_tag","embeddable":true,"href":"https:\/\/smartairfilters.com\/learn\/wp-json\/wp\/v2\/helpie_tag?post=5449"},{"taxonomy":"helpie_add_tag","embeddable":true,"href":"https:\/\/smartairfilters.com\/learn\/wp-json\/wp\/v2\/helpie_add_tag?post=5449"},{"taxonomy":"helpie_up_tag","embeddable":true,"href":"https:\/\/smartairfilters.com\/learn\/wp-json\/wp\/v2\/helpie_up_tag?post=5449"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}