Air Filters | Replacement Filters for Furnaces & HVAC Units | Filters Fast
Free Shipping on orders over $99 FREE 365-DAY RETURNS
Filters Fast Logo

Find Replacement Air Filters Fast & Easy!

Air Filter Shield

While many people worry about outdoor air quality, statistics show that they actually should be more concerned about indoor air quality (IAQ). IAQ is the measure of harmful pollutants discovered within or around your home. The EPA ranks IAQ as one of the top five public health risks.

Shop all Air Filter Brands

Popular Air Filter Brands

Air Filter FAQ

Can I use the same air filter for both heat and AC?
Which direction does the air filter go?

Always point the arrow on the box in the direction of airflow. If you are unsure the direction of airflow turn on the system fan. Do not remove the old filter before checking airflow as this might allow dirt or debris to escape.

What is air filter MERV rating?

The Minimum Efficiency Reporting Value (MERV) is used by manufacturers to explain how efficient the air filter is at trapping airborne particles. A higher MERV rating means cleaner air but reduced air flow. MERV 8 filters capture 80% of airborne particles like pollen, dust mites, mold spores, and pet dander down to 3 microns in size. MERV 11 air filters capture up to 95% of the above mentioned airborne particles down to 1 micron in size. If you choose a MERV 13 filter expect greatly diminished airflow but improved filtration of bacteria, tobacco smoke, and cooking oil down to 0.3 micron in size. Before you choose a MERV rating check with your HVAC manufacturer to see what your system is designed to handle. Picking the wrong filter can impact air flow and reduce equipment life.

When to change the air filter in your house?

Replace your air filters every 3 months. You may need to replace your filters more frequently depending on air quality. If you are unsure about indoor air quailty check the filter monthly. If you notice the filter material is greatly discolored or noticably dirty change out the filter. Failing to replace air filters as recommened can lead to reduced system efficieny, greater energy costs, and poor air quailty.

Which air filter is best for allergies?

If you have respiratory problems caused by pollen, dust, mold, or pet dander a MERV 11 filter can help reduce the severity of aliments caused by allergies. If you are sensitive to smoke from cooking or tobacco a MERV 13 filter is recommend. For many allergy sufferers it is recommend you install filters to process both supply and return air. Before you choose a MERV rating check with your HVAC manufacturer to see what your system is designed to handle. Picking the wrong filter can impact air flow and reduce equipment life.

Which air filter is best for my home?

Your choice in air filter should depend on needs. MERV 8 filters are perfect if you have no pets and allergies are not a serious concern. MERV 11 filters are recommend for occasional allergy sufferers and homes with pets. A MERV 13 filter should be used if allergies are a serious concern and there are tobacco smokers in the house.

Where are they made?

Filtersfast brand air filters are proudly made in America. While the manufacturing location of products can vary from company-to-company, Country of Origin laws require that most products manufactured outside of America bear labeling that tells consumers where the product is made. This label should be visable on the product itself or the packaging in which it arrived.

Are the home air filters electrostatically charged?
6-Pack Filters Graphic

Air Filters Product List:


Genuine AprilAire 213 20x25x4 MERV 13 Healthy Home Air Filter
In Stock!
Ships in 1 business day

Retail: $79.99

As Low As: $56.99

Save 29%!

Genuine AprilAire 413 16x25x4 MERV 13 Healthy Home Air Filter
In Stock!
Ships in 1 business day

Retail: $79.99

As Low As: $56.99

Save 29%!

Genuine AprilAire 210 20x25x4 MERV 11 Clean Air Filter
In Stock!
Ships in 1 business day

Retail: $79.99

As Low As: $54.99

Save 31%!

Genuine AprilAire 201 20x25x6 MERV 10 Healthy Air Filter
In Stock!
Ships in 1 business day

Retail: $59.99

As Low As: $35.99

Save 40%!

Genuine AprilAire 501 16x25x6 MERV 15 Air Filter
In Stock!
Ships in 1 business day

Retail: $89.99

As Low As: $46.99

Save 48%!

Lennox X6673 20x25x5 MERV 11 Healthy Climate Furnace & AC Air Filter
In Stock!
Ships in 1 to 2 business days.

Retail: $80.99

As Low As: $61.95

Save 24%!

Genuine Honeywell FC100A1029 16x25x4 MERV 11 Home Media Furnace & AC Air Filter
In Stock!
Ships in 1 business day

Retail: $69.99

As Low As: $57.95

Save 17%!

Genuine Carrier GAPCCCAR2025 20x25x3.5 MERV 15 Furnace & AC Air Filter
FREE SHIPPING!

within the continental U.S.

In Stock!
Ships in 1 to 2 business days.

Retail: $169.99

As Low As: $107.95

Save 36%!

Genuine Carrier GAPCCCAR1625 17x25x3.5 MERV 15 Furnace & AC Air Filter
FREE SHIPPING!

within the continental U.S.

In Stock!
Ships in 1 to 2 business days.

Retail: $149.99

Our Price: $119.95

Save 20%!

Genuine Carrier GAPCCCAR2020 20x20x3.5 MERV 15 Furnace & AC Air Filter
FREE SHIPPING!

within the continental U.S.

In Stock!
Ships in 2 to 3 business days.

Retail: $159.99

Our Price: $129.95

Save 19%!

Lennox X6675 20x25x5 MERV 16 Healthy Climate Furnace & AC Air Filter
FREE SHIPPING!

within the continental U.S.

In Stock!
Ships in 2 to 3 business days.

Retail: $210.99

Our Price: $149.95

Save 29%!

Lennox X6670 MERV 11 Pleated Filter Media-16x25x5
In Stock!
Ships in 3 to 4 business days.

Retail: $80.99

As Low As: $54.95

Save 32%!

Genuine Lennox X6672 16x25x5 MERV 16 Healthy Climate Furnace & AC Air Filter
FREE SHIPPING!

within the continental U.S.

In Stock!
Ships in 1 to 2 business days.

Retail: $159.99

Our Price: $98.95

Save 38%!

Genuine Carrier GAPCCCAR1620 16x20x3.5 MERV 15 Furnace & AC Air Filter
FREE SHIPPING!

within the continental U.S.

In Stock!
Ships in 1 to 2 business days.

Retail: $152.99

As Low As: $112.95

Save 26%!

TopTech TT-FM-2025 Techpure 20x25x4 MERV 11 Filter
In Stock!
Ships in 1 to 2 business days.

Retail: $59.99

As Low As: $45.95

Save 23%!

Genuine Lennox Y6605 16x26x5 MERV 16 PureAir Furnace & AC Air Filter
FREE SHIPPING!

within the continental U.S.

In Stock!
Ships in 2 to 3 business days.

Retail: $159.99

Our Price: $134.99

Save 16%!

BioStrike CFF Ceiling Fan Air Filter
In Stock!
Ships in 1 business day

Retail: $17.99

Our Price: $11.95

Save 34%!

GeneralAire 12758, 4001 MERV 11 Filter Media Replacement
In Stock!
Ships in 1 business day

Retail: $64.99

Our Price: $54.99

Save 15%!

Filters Fast® FFFAPF03 Replacement for FAPF03
In Stock!
Ships in 1 business day

Retail: $39.99

As Low As: $31.95

Save 20%!

GeneralAire 1099-20 Evaporator Filter Pad - 7047
In Stock!
Ships in 1 business day

Retail: $39.99

As Low As: $24.99

Save 38%!

Genuine Carrier GAPCCCAR2420 21x24x3.5 MERV 15 Furnace & AC Air Filter
FREE SHIPPING!

within the continental U.S.

In Stock!
Ships in 1 to 2 business days.

Retail: $149.99

As Low As: $126.95

Save 15%!

TopTech TT-FM-2020 TechPure 20x20x4 MERV 11 Filter
In Stock!
Ships in 1 to 2 business days.

Retail: $59.99

Our Price: $44.95

Save 25%!

Lennox X8788 20x26x5 MERV 16 PureAir Furnace & AC Air Filter
FREE SHIPPING!

within the continental U.S.

In Stock!
Ships in 2 to 3 business days.

Retail: $189.99

Our Price: $144.95

Save 24%!

MERV 11 Geothermal 2" Filters Fast® Air Filters 6-Pack
In Stock!
Ships in 1 to 2 business days.

Retail: $119.99

Our Price: $98.95

Save 18%!

Lennox X0585 MERV 11 Pleated Media Filter - HCC14 Genuine Part
In Stock!
Ships in 2 to 3 business days.

Retail: $80.99

Our Price: $56.95

Save 30%!

Page 1 2 3 4 5 6 7 [ Back | Next ]

Air/HVAC filters are an important part of air conditioning systems and are used to clean and purify the air. Air filters trap airborne particles, such as dust, pollen, and other allergens, and can also help reduce odors and improve air quality. Regularly changing your HVAC filters is essential to help keep your air conditioning system working properly and efficiently. It can also help to reduce energy bills and improve the indoor air quality of your home or business.

Air filters are usually found either in your furnace or in a return on your wall or ceiling. How many air filters your home has will depend on the type of system you have and how many floors you have in your home.

Why do you need to change your Air Filter?

Changing air filters regularly can help to reduce the buildup of dirt and debris in your HVAC system, which can lead to more frequent maintenance and repairs. It will also help to improve airflow, reduce allergies and asthma symptoms, and improve the overall efficiency of your system. Regularly changing your air filter can also help to reduce energy costs by ensuring that the system is running as efficiently as possible.

It is recommended that AC filters be changed at least every 1-3 months. How often you install an air filter replacement will depend on how many people are living in your home, how many pets you have, and if anyone in your household suffers from asthma or allergies. As a best practice, check your furnace filters every month and replace the filter when needed.

Remembering what size air filter you need is hard and remembering when to change it is even harder! The Home Filter Club air filter subscription program was created to make remembering these things easier. Once you've found the size filter you need, you can select your order frequency and it will be delivered directly to your door exactly when you need it!

What kind of pollutants are in my home's air?

The pollutants in your home's air can vary depending on the environment. Common air pollutants include dust, smoke, pet dander, mold spores, volatile organic compounds (VOCs), and other airborne particles. That's why air filtration is so important! Regularly changing your air filter can help reduce the amount of these pollutants in your home, improving the air quality and your family's health.

The MERV rating system was created to help you find the right air filter for your home. MERV which stands for Minimum Efficiency Reporting Value, will help you understand what types of air pollutants the air filter will capture. The higher the MERV value, the more contaminants it will prevent from getting into your HVAC unit. The most recommended MERV ratings for residential homes are MERV 8, MERV 11, and MERV 13.

When selecting a MERV rating, it is important to understand the impact that the MERV will have on the air flow in your home. This is why it's important to make sure that you check to make sure that your Heating, Ventilation, and Air Conditioning System can handle the MERV rating you select. Sometimes if a MERV rating is too high it can create what is called a "pressure drop" and can put a strain on your unit.

To learn more about how to select the filter rating that is right for you, visit our blog.

How do I find the correct air filter for my house?

There are a variety of air filter sizes available which is why it is extremely important to make sure that you have the correct size filter for your HVAC. There are a couple of different ways you can find out what size filter you need. If you have an existing filter, you might find that the size is printed along the edge of the filter. You can also measure the length, width, and depth of the filter to find the size.

If once you measure your filter, you're having a hard time finding the exact size you need, you can round the number closest to the actual size of your filter. If you are still having trouble finding the air filter size you need, we can make a custom air filter for you!

&ldquo This is quoted text.&rdquo That&rsquo s all.



Get Help and Support Need Help?
X