Which way does the AC filter go in? This simple question, and fortunately, it has a simple answer!
Watch this short video for a quick explanation:
Why Is It Important to Know Which Way the Air Filter Goes?
First, let’s discuss why knowing how the air filter enters your system is essential. Providing your home with the highest-quality air is vital to your well-being. This means ensuring that your filter is operating at maximum efficiency, and correct installation is necessary for that to happen.
Air filters work by trapping particles on their surface. The more particles trapped in this area, the less they will escape into your home and pollute indoor air quality.
The back of the filter contains its support structure, usually a metal mesh or a cardboard frame. The front of an air filter contains the filter media that captures dangerous contaminants, so it should be the first surface your air contacts.
Why Which Way You Install Your Filter Matters
Installing a filter incorrectly is basically like having a dirty air filter! An incorrectly installed filter will inhibit airflow through the media, and your HVAC unit will consume more energy to shoulder the increased workload. This will drive up costs in multiple ways. Not only will you pay more for energy usage, but you could also damage your system!
Installing a filter backward will restrict air flow, forcing your air conditioner to work harder and longer to push cool air out. This will increase wear and tear, high monthly utility bills, and even cause your HVAC system to wear out more quickly.
A well-maintained HVAC unit can last 15-20 years in most climates. However, if you live in an area where you’ll need air conditioning for most of the year, like Florida, you can expect to get 8-14 years out of your unit before you need to replace it. But only if you keep up with regular maintenance and filter changes.
Which Way Does the Airflow Arrow Point?
Is there an arrow on the filter? Ensure it points toward the air return. If you have an upflow furnace, the filter should face up; if you have a downflow furnace, it should face down.
A simple way to remember this is if the furnace’s airflow pulls the air upwards, then the arrow should point upwards. The arrow must point in that direction if the airflow is pulling downwards or forward. This is an easy way to verify if the filter was installed correctly.
Something as simple as installing your air filter correctly and consistently will do wonders for your health and wallet!
Want to learn about more ways you can save money and cut costs?
How often should you change your AC air filter, especially during the summer?
You must change your filter at least every 3 months to maintain the maximum benefit for your HVAC system and ensure healthy indoor air quality in your home.
However, it’s a good idea to get into the habit of checking your air filter every month. This is especially important during periods when you use air conditioning frequently. Doing this will help your system run smoothly and not work too hard.
How to Never Forget to Replace Your Air Filters
Our Home Filter Club subscription program delivers your filters directly to your door. All you need to do is subscribe and pick your desired delivery option, and we’ll take care of the rest!
A Simple Answer Revealed!
Changing your air filter often and knowing the right direction are essential. This helps keep your home healthy and extends the life of your home’s systems.
Remember, make sure the airflow arrow on your air filter points toward the return or furnace so it can do its job correctly. This will save you lots of money and hassle in the long run!
Do you have any other questions about air filters? Our Customer Care Team is ready to help! Contact us at 866-438-3458
or [email protected] today!
Brandon says
Hello Becky, thanks for your comment and for a bit of busy work! :). Even if the filter is inserted vertically, the airflow arrow needs to be pointing towards the furnace/AC unit. As far as the difference between the brands, you’ll want to ensure the make of the filter is quality. Which at Filters Fast, is something that we pride ourselves on. As for MERV ratings, it depends on what your use case is. For a general quick guide, MERV rating 8 – 13 are good for residential use. Anything higher can damage your HVAC system, as those levels of ratings are for commercial use like hospitals. Anything lower isn’t as effective for removing airborne particles. Here’s a visual for what type of particles the residential recommended MERVs remove.
Hope that helps. Take care!
Becky says
You reference placement for installing a filter horizontally. Would you mind elaborating on a filter that is to be inserted vertically? I’m quite certain I know the answer & I’m sure it seems obvious to most but I’m also quite sure there may be some who could use clarification. 🙂 Thanks in advance! Also, of course you’re going to promote your brand & that is totally understandable. However, I’d like to know if there’s really a significant difference between the many brands available & maybe include some merv rating info as well, if possible. Yes, Google can provide this info but figured since I’m already asking questions I might as well include all of those things. Plus it gives you something to do to pass the time. 😉 Thanks in advance!
Katie says
Hi Cathy,
Thank you for your question. Our FiltersFast.com brand air filters are only available in packs of 6, but we do sell other brands in smaller packs.
Cathy says
Can I buy 2 or 3 filters instead of a whole case?