{"id":14551,"date":"2025-02-10T09:34:32","date_gmt":"2025-02-10T14:34:32","guid":{"rendered":"http:\/\/www.filtersfast.com\/blog\/?p=14551"},"modified":"2025-02-12T15:06:04","modified_gmt":"2025-02-12T20:06:04","slug":"which-way-does-furnace-filter-go","status":"publish","type":"post","link":"https:\/\/blog.filtersfast.com\/blog\/which-way-does-furnace-filter-go\/","title":{"rendered":"Which Way to Install Your Furnace Filter"},"content":{"rendered":"<p style=\"text-align: justify;\">Have you ever experienced problems when replacing a furnace filter? Well, you&#8217;re not the only one! We&#8217;ve all experienced it at some point. Remembering when to change your air filter is one thing, and when it&#8217;s time to install it, you\u2019re not sure which direction the air filter arrow should point.<\/p>\n<h2 style=\"text-align: justify;\">Should the airflow arrow point up or down?<\/h2>\n<p style=\"text-align: justify;\">No matter how much research you do, you may not find the answer you want. However, the answer to this question <em>is<\/em> simple.<\/p>\n<p><a href=\"https:\/\/www.filtersfast.com\/\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-22408 size-full\" src=\"https:\/\/blog.filtersfast.com\/blog\/wp-content\/uploads\/2021\/01\/iStock-614737406.jpg\" alt=\"Handyman replaces a furnace filter with a clean one\" width=\"724\" height=\"483\" srcset=\"https:\/\/blog.filtersfast.com\/blog\/wp-content\/uploads\/2021\/01\/iStock-614737406.jpg 724w, https:\/\/blog.filtersfast.com\/blog\/wp-content\/uploads\/2021\/01\/iStock-614737406-400x267.jpg 400w\" sizes=\"auto, (max-width: 724px) 100vw, 724px\" \/><\/a><\/p>\n<h2 style=\"text-align: justify;\">The arrow should always point in the direction the air is flowing.<\/h2>\n<p style=\"text-align: justify;\">Alex, our in-house air filter expert, has this to say about which way the air filter should be installed:<\/p>\n<blockquote>\n<p style=\"text-align: justify;\"><em>\u201cYou need to verify which way the air flows, and the arrow should point in the direction the air is flowing. If the air is not flowing, briefly turn the fan on to verify the direction.\u201d<\/em><\/p>\n<\/blockquote>\n<p style=\"text-align: justify;\">Like many, you may be wondering why the arrow should point in the direction the air flows. The answer lies in the way the air filter is built. The front side of the filter is the &#8220;filter media,&#8221; commonly called \u201cpleats.\u201d The back side usually has a metal mesh or a cardboard frame on some filters. The back of the filter is built as a support system for the front of the filter. You need the air to push the media (front side) into the metal mesh (back side) for proper support.<\/p>\n<h2>What Happens if You Install Your Furnace Filter the Wrong Way?<\/h2>\n<p>Improperly installing your air filter might not seem like a big deal, but it can negatively impact many things. When your furnace filter is installed incorrectly, your air quality will be poor; it can cause your HVAC system to not run as efficiently, lead to more frequent filter changes, and potentially damage your furnace.<\/p>\n<h2>How Can I Tell If My Furnace Filter Is Installed Incorrectly?<\/h2>\n<p>There are a few ways to tell if you&#8217;ve installed your air filter wrong. Here&#8217;s what to look for:<\/p>\n<ol>\n<li>Dirt and Dust Accumulation: If you notice a dirt and dust build-up on the filter&#8217;s metal side, it&#8217;s been installed incorrectly. The metal mesh side of the filter should remain clean when using a pleated filter.<\/li>\n<li>Airflow Arrow Direction: If your filter has an airflow arrow on its frame, it should point toward the wall or the furnace, not toward you or away from the furnace.<\/li>\n<li>Noise: If you notice noises coming from your return or furnace when it is running, it could be a sign that your filter is installed incorrectly.<\/li>\n<li>Decreased Efficiency: A clear sign that you&#8217;ve installed your filter wrong is if you notice a drop in your system efficiency. If your furnace is running harder or your energy bill is higher than usual, check to ensure you&#8217;ve installed your filter in the correct direction.<\/li>\n<\/ol>\n<p>Taking a few extra seconds to ensure you&#8217;ve installed your filter correctly will save you time, money, and frustration in the long run.<\/p>\n<p><a href=\"https:\/\/www.filtersfast.com\/\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-22407 size-full\" src=\"https:\/\/blog.filtersfast.com\/blog\/wp-content\/uploads\/2021\/01\/iStock-178384618.jpg\" alt=\"man changing air filter in ceiling\" width=\"655\" height=\"533\" srcset=\"https:\/\/blog.filtersfast.com\/blog\/wp-content\/uploads\/2021\/01\/iStock-178384618.jpg 655w, https:\/\/blog.filtersfast.com\/blog\/wp-content\/uploads\/2021\/01\/iStock-178384618-369x300.jpg 369w\" sizes=\"auto, (max-width: 655px) 100vw, 655px\" \/><\/a><\/p>\n<h2>What To Do If You&#8217;ve Installed Your Furnace Filter Incorrectly<\/h2>\n<p>If you&#8217;ve identified that you&#8217;ve installed your filter incorrectly, the first step is realizing it! Now is the easy part, correct it! Turn off your furnace before you pull your furnace filter out. Look at the filter and ensure the mesh side points away from you or your furnace. And reinstall it! It&#8217;s that simple. If your filter seems dirty, replacing it with a new one is best.<\/p>\n<h2><\/h2>\n<h2>How Do You Know If You Have The Right Size Filter?<\/h2>\n<p>The right size filter is as important as ensuring it&#8217;s installed correctly. To ensure that you have the right size, check out <a href=\"https:\/\/blog.filtersfast.com\/blog\/how-to-find-the-air-filter-size-you-need\/\">3 Ways to Find the Air Filter Size You Need<\/a>.<\/p>\n<h2>Where to Buy Replacement Furnace Filters<\/h2>\n<p style=\"text-align: justify;\">Now that you know which direction the arrow should point and why it should point in that direction, you\u2019re ready to order your replacement air filter.<\/p>\n<p style=\"text-align: center;\"><a class=\"ffbutton\" href=\"https:\/\/www.filtersfast.com\/Furnace-Filters-cat.asp\" rel=\"nofollow\">Order Furnace Filter<\/a><\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: justify;\">Are you looking for high-quality pleated air filters without the crazy price tag? Filters Fast\u00ae\u00a0Brand Air Filters are the perfect option! Available in MERV 8,\u00a0<span style=\"box-sizing: border-box; margin: 0; padding: 0; text-align: left;\">11, and\u00a0MERV 13, our pleated\u00a0furnace filters are affordable and\u00a0<\/span>delivered right to your door!<\/p>\n<p><a href=\"https:\/\/www.filtersfast.com\/\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-19106 size-full aligncenter\" src=\"https:\/\/blog.filtersfast.com\/blog\/wp-content\/uploads\/2016\/04\/filtersfastfilters.jpg\" alt=\"filters fast furnace ac air filters\" width=\"1690\" height=\"868\" srcset=\"https:\/\/blog.filtersfast.com\/blog\/wp-content\/uploads\/2016\/04\/filtersfastfilters.jpg 1690w, https:\/\/blog.filtersfast.com\/blog\/wp-content\/uploads\/2016\/04\/filtersfastfilters-300x154.jpg 300w, https:\/\/blog.filtersfast.com\/blog\/wp-content\/uploads\/2016\/04\/filtersfastfilters-768x394.jpg 768w, https:\/\/blog.filtersfast.com\/blog\/wp-content\/uploads\/2016\/04\/filtersfastfilters-1024x526.jpg 1024w\" sizes=\"auto, (max-width: 1690px) 100vw, 1690px\" \/><\/a><\/p>\n<p style=\"text-align: justify;\">AC filters should be changed at least every 3 months, so having extras on hand is always a good idea. If you&#8217;re unsure which air filter best fits you, see <a href=\"http:\/\/www.filtersfast.com\/blog\/index.php\/2012\/09\/fall-maintenance-how-to-choose-an-air-filter\/\" target=\"_blank\" rel=\"noopener\">Three Questions to Ask Before Buying Your Next Air Filter<\/a> for additional help.<\/p>\n<p style=\"text-align: center;\"><a class=\"ffbutton\" href=\"https:\/\/www.filtersfast.com\/Filters-Fast-Air-Filters-cat.asp\" rel=\"nofollow\">Shop Filters Fast\u00ae<\/a><\/p>\n<p style=\"text-align: justify;\">As always, Filters Fast is here to assist. If you have any questions about which air filter you should choose, feel free to ask below, and we&#8217;ll be more than happy to help.<\/p>\n<p style=\"text-align: justify;\">\n","protected":false},"excerpt":{"rendered":"<p>Have you ever experienced problems when replacing a furnace filter? Well, you&#8217;re not the only one! We&#8217;ve all experienced it at some point. Remembering when to change your air filter is one thing, and when it&#8217;s time to install it, you\u2019re not sure which direction the air filter arrow should point. Should the airflow arrow [&hellip;]<\/p>\n","protected":false},"author":24,"featured_media":22410,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[3467,3458],"tags":[3298,3297,3296],"ppma_author":[86195],"class_list":{"0":"post-14551","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-diy-do-it-yourself","8":"category-homeowners","9":"tag-filter-arrow","10":"tag-home-air-filter-replacement","11":"tag-which-way-does-air-filter-go","12":"entry"},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.6 (Yoast SEO v27.6) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Which Way to Install Your Furnace Filter - The Filtered Files - Filters Fast - Your #1 Resource for Air and Water Filtration Related Information<\/title>\n<meta name=\"description\" content=\"Which way does the furnace filter go? 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