HomeWHICHWhich Way Does Air Filter Go In

Which Way Does Air Filter Go In

man changing air filter in ceilingwhich was does the air flow arrow point

When changing out your furnace filter for a new one, do you ever wonder if you are installing it the correct way? Believe it or not, there is a right way and a wrong way to change your AC filter. The air flow arrow is the key!

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Locating Your Air Filters

In most cases, you should have one air filter for each level of your house. Finding where you air filters are located is extremely important. Sometimes they can be in your furnace, ceiling, or in the wall.

After you’ve located where your filters are, you’ll need to find the size you need and figure out which MERV rating best fits your needs. Need help? Check out these blogs for help:

  • How to Measure Your Air Filter
  • Which MERV Rating Should I Choose?

How To Safely Change Your Air Filter

Once you’ve figured out the size and MERV rating you need, it’s time to get ready to change your furnace filter. Here’s a quick video on how to safely change your air filter:

Don’t forget! Turn off you HVAC system while you are changing your air filter.

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If you inspect your new air filter, you may see an arrow that says, “Air Flow”. Here’s an example:

changing furnace filter in wall pointing at air flow arrow

Which Way Should The Air Filter Arrow Point?

When changing furnace filters many people wonder where the arrow on the filter should point. The arrow should always point in the direction the air is flowing.

Here’s an easy way to figure out which way the airflow arrow should point: The arrow should ALWAYS point towards your return or furnace. The pleated part of the filter should be facing you when you install it. The other side, which usually consists of a metal mesh or cardboard frame, should be pointed towards the return.

changing air filter

man changing ac filter using air flow arrow

changing pleated air filter

man changing HVAC filter in wall

Once you’ve properly installed your furnace filter, you can close the metal grille grate and turn your HVAC system back on.

air filter grille grate

Which Way Does the Air Flow Arrow Point?

Time to order furnace filters? We’ve got you covered!

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Wish there was an easier way to remember what size air filter you need and when it’s time to change it? Sign up for our Home Filter Club filter subscription service! Just find the filter you need, subscribe, and save!

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Have a question about furnace filter installation? Drop in the comments below.

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