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Filterbuy 20x25x4 Air Filter MERV 8 Dust Defense (6-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 19.38 x 24.38 x 3.63 Inches)

4.6 4.6 out of 5 stars 420 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Furnace Filters by Filterbuy

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Purchase options and add-ons

Brand Filterbuy
Material Polyester, Aluminum, Plastic
Product Dimensions 19.38"L x 24.38"W x 3.63"Th
MERV Rating 8.00
Compatible Devices Air Conditioner, Heat Pump, Air Cleaner, Furnace
Item Weight 18 Pounds
Product Grade Replacement Parts

About this item

  • 20x25x4 replacement air filters for your furnace, air conditioner, heat pump, or HVAC system (actual size: 19.38" x 24.38" x 3.63")
  • MERV 8 synthetic media (comparable with MPR 600 & FPR 5) protects homes from dust, pollen, and more by trapping 90% of airborne particles without impacting air flow
  • High-quality construction features an electrostatically charged, pleated design that captures more harmful particles and prolongs the products lifespan by 3 times that of fiberglass models
  • Industrial-grade beverage board frames with dual wire backings outperform standard cardboard designs
  • All components are manufactured within the United States and designed with recyclable materials
See more product details

Customer ratings by feature

Easy to install
4.3 4.3
Value for money
4.1 4.1
Sturdiness
4.0 4.0

Frequently bought together

$93.24 ($15.54/Count)
Get it as soon as Tomorrow, Mar 22
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$92.76 ($15.46/Count)
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$132.96 ($22.16/Count)
Get it as soon as Tomorrow, Mar 22
In Stock
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This Item
Filterbuy 20x25x4 Air Filter MERV 8 Dust Defense (6-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 19.38 x 24.38 x 3.63 Inches)
Filterbuy 20x25x4 Air Filter MERV 8 Dust Defense (6-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 19.38 x 24.38 x 3.63 Inches)
Recommendations
Honeywell Home 20x25x4 MERV 8, AC Furnace Air Filter, 3 PACK (CF100A1025-3PKAM) (Actual Dimensions: 19.94 x 24.87 x 4.38 in.)
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Filterbuy 20x25x4 Air Filter MERV 8 Dust Defense (3-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 19.38 x 24.38 x 3.63 Inches)
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Filterbuy 20x25x4 Air Filter MERV 11 Allergen Defense (5-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 19.38 x 24.38 x 3.63 Inches)
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Aerostar 16x25x1 MERV 8 Pleated Air Filter, AC Furnace Air Filter, 6 Pack (Actual Size: 15 3/4"x 24 3/4" x 3/4"), White
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Price$93.24-20% $87.75
List:$109.99
$83.60$58.95$103.25-12% $38.35
List:$43.57
Delivery
Get it as soon as Tomorrow, Mar 22
Get it as soon as Tuesday, Mar 26
Get it as soon as Tomorrow, Mar 22
Get it as soon as Tomorrow, Mar 22
Get it as soon as Tomorrow, Mar 22
Get it as soon as Tuesday, Mar 26
Customer Ratings
Easy to install
4.3
4.5
5.0
4.8
5.0
4.5
Value for money
4.1
4.3
4.6
4.5
5.0
4.2
Sturdiness
4.0
4.0
5.0
4.6
5.0
4.0
Sold By
Filterbuy
Amazon.com
Filterbuy
Filterbuy
Filterbuy
Amazon.com
compatible devices
Air Conditioner, Furnace, Heat Pump, Air Cleaner
Air Cleaner, Furnace
Air Conditioner, Furnace, Heat Pump, Air Cleaner
Air Conditioner, Furnace, Heat Pump, Air Cleaner
Air Conditioner, Furnace, Heat Pump, Air Cleaner
Furnace, Air Conditioner
MERV rating
8
8
8
8
11
8
number of items
1
1
1
1
1
1
material
Plastic, Aluminum, Polyester
Fiberglass
Plastic, Aluminum, Polyester
Plastic, Aluminum, Polyester
Plastic, Aluminum, Polyester
Pleated

From the brand


Product Description

smiling man piggybacks daughter in clean house as filterbuy air filters help them breathe freely

Replacement Air Filter 20x25x4 (Actual Size: 19.38 x 24.38 x 3.63 Inches)

silver merv 8 banner badge

20x25x4 MERV 8

gold merv 11 banner badge

20x25x4 MERV 11

platinum merv 13 banner badge

20x25x4 MERV 13

silver merv 8 banner badge

16x25x1 MERV 8 (Popular)

silver merv 8 banner badge

20x20x1 MERV 8 (Popular)

silver merv 8 banner badge

20x25x1 MERV 8 (Popular)

Customer Reviews
4.5 out of 5 stars
4,750
4.4 out of 5 stars
1,591
4.3 out of 5 stars
2,099
4.7 out of 5 stars
11,777
4.7 out of 5 stars
13,411
4.7 out of 5 stars
7,985
Recommended Use
Standard Home & Business Superior Home & Business Optimal Home & Business Standard Home & Business Standard Home & Business Standard Home & Business
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
Filtration Effectiveness
90% Airborne Particles 95% Airborne Particles 98% Airborne Particles 90% Airborne Particles 90% Airborne Particles 90% Airborne Particles
Particle Size
3 - 10 Microns 1 - 3 Microns 0.3 - 1 Microns 3 - 10 Microns 3 - 10 Microns 3 - 10 Microns
Dust & Debris
Mold & Pollen
Lint & Dander
Smog & Smoke
Bacteria
anatomy of an air filter blown out photo where the wiring pleats and frame are all shown separately

Choosing the Correct Filter Size

zoomed photo of white air filter frame showing nominal and actual size of 16x16x1 filter in green

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 16 x 1). Whereas the actual size is an exact measurement, normally in a smaller font, that depicts the filter's precise dimensions (ex: 15.75 x 15.75 x .75). All filters have both.

smiling man in blue holds extended tape measure in front of him to show how to measure an air filter

Measuring Your Air Filters

If your current air filter does not have a dimension listed on the frame, use a tape measure to record the length x width 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.

Will these air filters fit my system?

Most of our filters are universally compatible, and will work with virtually any furnace, air conditioner, heat pump, or HVAC system. But if you see a specific brand name like Honeywell within a product title, then it is designed for an exact model.

How do I change my air filter?

Once you find the right size, turn off your power supply and remove the cover from your intake vent. You can then take out the old filter and dispose of it safely. Finally, just insert your new filter, replace the cover, and turn the power back on.

How often 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.

How many air filters do I need?

This varies for every customer depending on specific needs like those referenced in the prior answer. 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.

Product information

Technical Details

Additional Information

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
Product Warranty: For warranty information about this product, please click here

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Filterbuy 20x25x4 Air Filter MERV 8 Dust Defense (6-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 19.38 x 24.38 x 3.63 Inches)


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Customer reviews

4.6 out of 5 stars
4.6 out of 5
420 global ratings
Some damaged item received.
4 Stars
Some damaged item received.
I ordered 6 filters and 2 of them found damaged/crashed upon unboxing .Filterbuy should look into this matter .
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Top reviews from the United States

Reviewed in the United States on December 9, 2023
Reviewed in the United States on April 6, 2023
Reviewed in the United States on December 26, 2023
Reviewed in the United States on July 13, 2023
Customer image
4.0 out of 5 stars Some damaged item received.
Reviewed in the United States on July 13, 2023
I ordered 6 filters and 2 of them found damaged/crashed upon unboxing .

Filterbuy should look into this matter .
Images in this review
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Customer image
One person found this helpful
Report
Reviewed in the United States on August 30, 2023
Reviewed in the United States on August 3, 2023
Reviewed in the United States on July 25, 2023
Customer image
1.0 out of 5 stars Not 4 inch thick only 3 inch
Reviewed in the United States on July 25, 2023
Although these say they are 4 inch thick, they are not even close. They are only about 3 inches thick, so they do not fit properly (and therefore wont work properly). See attached pic where I have it side by side with a correct sized 4 inch filter.
Images in this review
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Customer image

Top reviews from other countries

Dave
1.0 out of 5 stars Beware
Reviewed in Canada on April 23, 2023
Customer image
Dave
1.0 out of 5 stars Beware
Reviewed in Canada on April 23, 2023
Order came quickly. Although the shipping box was still intact, as you can see on the pictures, all 6 filters were damaged or of poor quality.
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One person found this helpful
Report