Air Filters

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What Size Air Filter Do You Need? Shop All Sizes

Find the Right Air Filter for Your Home

What’s The

Get tips on materials, ratings, and how to change and air filter

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FPR Ratings  

The higher the number the better air filter performance, as rated by The Home Depot



The higher the number the finer the filtration, as rated by industry professionals  




Sign up for a Home Depot air filter subscription. Why?

For Your Health

For Your Health

Change your air filter at least once every 3 months. More often if you have pets, allergies, and during pollen season.

Save Money

Save Money 

Regular air filter replacement can lower your energy bill up to 15%. It’ll protect your HVAC system from unfiltered air making it last longer.

Convenient & Hassle Free

Convenient & Hassle Free

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*Easy returns to any store
*5% off repeat purchases

About Air Filters, Furnace Filters & AC Filters

What's the difference between an HVAC filter, a furnace filter and an AC filter? Absolutely nothing. What you call it depends on where you live. People up north might call it a furnace filter, down south an AC filter. Just know, no matter what you call it, it’s simply an air filter.

What Does an Air Filter Do, Exactly?
Air filters work a lot harder than you think. They can reduce pollen, smoke, pet dander, bacteria, dust, mold dust mites and more. You can choose how much filtering you need and get a replacement air filter that’s just right for your home.

Air Filter Rating Systems
The Home Depot put together a rating system, FPR so you know exactly what level filtration you are getting. MERV is another rating system that’s used across the industry as a standard. The higher the rating number, the more particulates that get filtered.

Air Filter Materials Matter?
Materials matter. Not all types of AC filters work the same. Carbon filters, for example are porous and can get rid of odors so your indoor air remains fresh. Fiberglass filters capture large particles. They’re sturdy but rank low on the ratings scale.

What are the Benefits of Furnace Filters?
Besides providing clean fresh air for your home, they can also filter harmful particulates keeping you safe from allergens and bacteria. Home air filters protect your HVAC system, but can be harmful if you don’t change them regularly. Lastly, you can save money on energy bills when you replace your home air filter. Your HVAC doesn’t have to work as hard to push air through a clean filter.

All the Home Air Filter Sizes
There’s no such thing as a standard size air filter. In fact, we stock over 1500 air filters. We pulled out some popular sizes and shapes here, but know if you search for yours, we have it. 

Set Your Air Filter Subscription and Forget It
Make sure your air quality is clean with the right air filters and get 5% off repeat purchases with our Home Depot Subscriptions delivery service. Schedule your replacement air filters to be sent to you on your time, when you need them most.


The model CA-360 Power Adapter is designed to The model CA-360 Power Adapter is designed to power the FILTERSCAN WiFi Air Filter Monitor Model FS-245-B. This power adapter is best used when a household power outlet is available within 6 ft. of the FILTERSCAN location and it eliminates the use of batteries. UL-approved its super thin design takes ...  More + Product Details Close
About Airthereal: A Real Room An Ethereal Ambiance. About Airthereal: A Real Room An Ethereal Ambiance. Airthereal cares about every breath in our lives. Now we are suffering from many different types of air problems: molds in humid climates chemical odors from house decoration cigarette smells viruses bacteria and allergens. Airthereal was established in 2017 in order to ...  More + Product Details Close
The FILTERSCAN WiFi Air Filter Monitor along with The FILTERSCAN WiFi Air Filter Monitor along with the AirFilterSentry Notification System notifies you when it is time to change your HVAC air filter therefore removing guesswork and optimizing air filter life. It utilizes patented differential pressure technology sensors and intelligent software to determine the optimum time to service your ...  More + Product Details Close
The True HEPA Filter captures 99.97% of airborne The True HEPA Filter captures 99.97% of airborne particles as small as 0.3 microns including pollen ragweed and other allergens viruses germs dust mites mold spores and cigarette smoke. AeraSafe antimicrobial treatment provides built-in protection from the growth of odor causing bacteria mildew and fungi on the True HEPA filter. ...  More + Product Details Close