Filterbuy 20x25x5 Air Filter MERV 11 Allergen Defense (4-Pack), Pleated HVAC AC Furnace Air Filters for Honeywell FC100A1037, Lennox X6673, Carrier, & More (Actual Size: 19.88 x 24.75 x 4.38 Inches)

Price: $102.16 - $97.05
(as of Feb 11, 2025 20:36:38 UTC – Details)

Product Description

Measurement System

Minimum Efficiency Reporting Value (MERV)

Rates the ability of filters to trap particles on a scale of 1-20 (smallest microns captured at 20).

Standard Protection (90%)

MERV 8 Air Filters

Perfect for almost any home or business that wants great indoor air quality at a reasonable rate.

Superior Protection (95%)

MERV 11 Air Filters

Perfect for homes or businesses accounting for factors like pets, smokers, and allergy sufferers.

Optimal Protection (98%)

MERV 13 Air Filters

Perfect for larger homes or businesses, and those who want the best possible filtration experience.

Odor Eliminator (90%)

MERV 8 Air Filters with Activated Carbon

Perfect for homes or businesses that want to inhibit unpleasant smells with reliable MERV 8 quality.

1 What is a MERV Rating?

2 MERV 8

3 MERV 11

4 MERV 13

5 Odor Eliminator

Replacement Air Filter 20x25x5 (Actual Size: 19.88 x 24.75 x 4.38 Inches)

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Customer Reviews

4.6 out of 5 stars

7,062

4.6 out of 5 stars

5,489

4.6 out of 5 stars

2,336

4.2 out of 5 stars

18

4.5 out of 5 stars

508

4.2 out of 5 stars

89

4.4 out of 5 stars

58

Price

$51.72$51.72

$54.17$54.17

$67.41$67.41

$91.08$91.08

$66.23$66.23

$81.70$81.70

$82.30$82.30

Compatible Brands

Honeywell, Lennox, & More

Honeywell, Lennox, & More

Honeywell, Lennox, & More

Honeywell, Lennox, & More

Trion Air Bear & More

Amana, Goodman, & More

Honeywell Return Grille

Actual Size

19.88″ x 24.75″ x 4.38″

19.88″ x 24.75″ x 4.38″

19.88″ x 24.75″ x 4.38″

19.88″ x 24.75″ x 4.38″

19.63″ x 24.13″ x 4.88″

20.18″ x 25.31″ x 5.25″

18.38″ x 23.38″ x 3.69″

Recommended Use

Standard Filtration (2-Pack)

Superior Filtration (2-Pack)

Optimal Filtration (2-Pack)

Odor Elimination (2-Pack)

Standard Filtration (2-Pack)

Standard Filtration (2-Pack)

Standard Filtration (2-Pack)

Best For

Healthy Families & Basic Needs

Allergy Sufferers & Pet Owners

Large Rooms & Medical Settings

Household Odors & Basic Needs

Healthy Families & Basic Needs

Healthy Families & Basic Needs

Healthy Families & Basic Needs

Filtration Effectiveness

90% Airborne Particles

95% Airborne Particles

98% Airborne Particles

90% Airborne Particles

90% Airborne Particles

90% Airborne Particles

90% Airborne Particles

Comparable Ratings

MPR 600 & FPR 5

MPR 1000 – 1200 & FPR 7

MPR 1500 – 1900 & FPR 10

MPR 600 & FPR 5

MPR 600 & FPR 5

MPR 600 & FPR 5

MPR 600 & FPR 5

Particle Size

3 – 10 Microns (µm)

1 – 3 Microns (µm)

0.3 – 1 Microns (µm)

3 – 10 Microns (µm)

3 – 10 Microns (µm)

3 – 10 Microns (µm)

3 – 10 Microns (µm)

Dust, Debris, & Dander

✔

✔

✔

✔

✔

✔

✔

Mold, Pollen, & Lint

✔

✔

✔

✔

✔

✔

✔

Smog & Smoke

✘

✔

✔

✔

✘

✘

✘

Bacteria

✘

✘

✔

✘

✘

✘

✘

Odors

✘

✘

✘

✔

✘

✘

✘

Choosing the Correct Filter Size Nominal Size vs. Actual Size

The nominal size is a shorthand number rounded to the nearest whole or half inch, normally in a larger font (ex: 16 x 20 x 1). Whereas the actual size is an exact measurement, normally in a smaller font, that depicts the filter’s precise dimensions (ex: 15.50 x 19.50 x 0.75). All filters have both.

Measuring Your Air Filter

If your current air filter does not have a dimension listed on the frame, use a tape measure to record the width x length x depth to find the actual size. Then round these measurements up to the nearest inch to find a corresponding nominal size, which will be easier to locate when searching online.

Why should I change my air filter?

To maintain a healthy lifestyle, as breathing dirty air can put you at risk to develop asthma, allergies, and other respiratory ailments. Plus, old filters can cause system defects which may lead to unwanted expenses via energy costs and repairs.

When should I change my air filter?

We generally recommend replacing your filter every 90 days to keep your system running efficiently and air clean. But this is subject to change based on filter size and variable factors for pet owners, allergy sufferers, homes with children, etc.

Will these air filters fit my system?

Most of our filters are universally compatible and will work with any furnace, air conditioner, heat pump, or HVAC system as long as you choose the proper size. But if you see a specific brand name on a listing, make sure it matches your unit model.

How many air filters do I need?

This varies for every customer depending on specific needs such as the number of vents in your home. However, our selection includes package quantities that range from 1 to 12 filters, so no matter what your situation may be, we’ve got you covered.

How do I change my air filter?

After finding the right size, turn off the power supply and remove the cover from your intake vent before taking out the old filter. Then just insert your new filter to match the direction of air flow, replace the cover, and turn the power back on.

About Us

The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked.

Better Air For All Championing indoor air quality

At Filterbuy, we care about the air you breathe because we consider it the foundation for maintaining a healthy lifestyle. Cleaner air is always better, and we are firm believers that everyone, everywhere deserves to breathe it. This is why we work around the clock to ensure that you, your family, and your community have access to clean indoor air, free of allergens and pollutants, that enables you to routinely live free and breathe freely.

Finding the Perfect Fit No matter the size, we’ve got you covered

We now offer a variety of expert services and hundreds of custom air filter sizes that are compatible with a near infinite number of systems, because we know that when it comes to clean air, there isn’t a one size fits all solution. This enables us to always provide value with a quality product that empowers you to protect your home or business, regardless of your filtration needs.

Green Means Clean Refreshing new look, same great quality

Our new, green frames are constructed with the same high quality materials that you have grown accustomed to. We made the decision to switch to this greener design to help symbolize the peace of mind that comes from knowing your home or business is being properly cared for. When you see Filterbuy green, you can exhale with the confidence that you are breathing crisp, pure, fresh air.

100% American Made Local sourcing and manufacturing

From our first air filter produced in 2013, we have proudly built our business in the USA, now manufacturing in Alabama, California, Florida, Illinois, North Carolina, Pennsylvania, Texas, and Utah. This robust, homegrown network gives us the unique ability to swiftly fulfill diverse, custom orders directly to the doors of households and businesses across the country at premium rates.

Subscribe and Save Don’t let changing your filter be a burden

The nature of air filters requires them be replaced regularly, but opting into a subscription service can help to simplify that process. All you need to do is find the right product and choose the delivery interval. We do the rest by making sure your filters arrive on time as requested. The majority of our Amazon catalog is already eligible for the program, and you even get a discount on every delivery when you enroll, making it an easy choice.

Where We Came From Nearly 70 years of giving back

Our small, family-owned and operated company has evolved since its inception in 1958 to the filtration business that you know and love today with thousands of employees serving millions of customers. As our team continues to expand to new neighborhoods across the country, we make sure to stay true to our values by keeping our commitment to community investment and personal aid at every possible opportunity.

20x25x5 replacement whole house air filters for your furnace, air conditioner, heat pump, or HVAC system (actual size: 19.88″ x 24.75″ x 4.38″)
MERV 11 synthetic media (comparable with MPR 1000 – 1200 & FPR 7) protects homes from pets, allergies, and more by trapping 95% of airborne particles without impacting air flow
High quality construction (made in the USA) features an electrostatically charged design with 8 pleats per foot that captures more harmful particles and lasts 3x longer than fiberglass models (replace every 90 days for best performance)
Easy installation beverage board (recyclable) frames with dual wire backings improve structural integrity and outperform standard cardboard designs by resisting extreme temperatures
Compatible Models: Honeywell / Air Demon Filter Part Numbers F25 (#203720), F35 / F35R (#FC35A1027), F100 / F150 (#FC100A1037), F200 (#FC200E1037), Bryant (FILBBCAR0020, FILXXCAR0020, FILXXCAR0120), Carrier (CARF8250602, CARFC100A1037, CARL86469, EXPXXFIL0020, EXPXXLMC0020, EXPXXUNV0020, FILCCCAR0020, FILXXCAR-0020, FILXXCAR0120), Day & Night (MACPAK20), Lennox (X8790, X0586, X5426, X6661, X6673, X7751, BMAC-20C, HCC20-28, HCF20-10, HCF20-16), Payne (MACPAK20)