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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.

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Air Filter FAQ

Can I use the same air filter for both heat and AC?

Yes, both AC filters and furnace filters are the same thing. We categorize filters based on their intended use to make filter shopping easier for the customer. During the summer months you are more likely to search for AC filters. While during colder winter months you are looking to buy furnace filters. A good tip for remembering when to change your filters is to replace them at the start of each new season.

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 efficent 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 airborn 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 micorn 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?

Yes, Filtersfast, Filtrete, Carrier, among many other air filter brands use an electrostatically charged filter media. Fiberglass air filters are far less common today and were never designed to improve air quality, rather they protect HVAC systems from large dirt and debris.

Routine maintenance is a critical part of caring for your home. One area that should not be overlooked is replacing your home’s furnace filters on a regular basis following the manufacturers recommended guidelines. By doing this, you will help prolong the life of your system, as well as help eliminate indoor air contaminates.

Air filters help rid your home of a variety of air pollutants including smog, smoke, pollen, bacteria, pet dander, mold spores, dust, dust mites, debris and virus carrying particles. The MERV rating on furnace filters can help guide you in this area. The higher the rating, the more efficient the air filter will be at eliminating indoor contaminates.

Filtrete, Trion, 3M and Honeywell all manufacture high quality filters in a variety of sizes to meet all of your air filtration needs.


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Furnace Filters product list


White Rodgers 16x26x5 Air Filter F825-0548 2pk
(FFC16265WRMM13)

The White Rodgers 16x26x5 Air Filter F825-0548 is a compatible economical alternative to the genuine 16x26x5 air furnace filter.


In Stock! Ships in 1 to 2 business days.
White Rodgers 16x26x5 Air Filter F825-0548 2pk
Our Price: $70.00
Retail: $90.00
You Save 22%!

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Trion Air Bear Supreme 20x20 Media Air Cleaner
(455602-225)

The Trion Air Bear Supreme 20x20 Media Air Cleaner, part number 455604-019, provides a clean and controlled indoor air environment in your home by removing dirt, dust, pollen and other microscopic particles such as grease and soot from your air.


In Stock! Ships in 10 to 11 business days.
Trion Air Bear Supreme 20x20 Media Air Cleaner
Our Price: $75.99
Retail: $120.74
You Save 37%!

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Filters Fast 5" Trane BAYFTAH21M Compatible 2-Pack
(FFC215215TRN OKGM)

The Filters Fast 5" Trane PF BAYFTAH21M Compatible FFC215215TRN OKGM fits the following: Any air cleaner that requires a 21" x 21.5" x 5" filter This Filters Fast air filter also replaces the Trane Perfect Fit BAYFTAH21M filter. This air filte


In Stock! Ships in 10 to 11 business days.
Filters Fast 5" Trane BAYFTAH21M Compatible 2-Pack
Our Price: $64.66
Retail: $99.99
You Save 35%!

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ED Lab Indoor Air Home Mold Test Kit
(BMSC)

This ED Lab Indoor Air Home Mold Test Kit is used to screen the air in your home for different mold types as well as fungal propagules. Filters Fast has teamed up with Environmental Diagnostics Lab (ED Lab) to provide this advanced home mold testing


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ED Lab Indoor Air Home Mold Test Kit
Our Price: $51.99
Retail: $59.99
You Save 13%!

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Trane Perfect Fit Filter 24x27x5 BAYFTFR24M 3-Pack
(HTRN2427T1)

These three Honeywell air filters are compatible furnace filters that can be used as upgrades over the Trane Perfect Fit filter of the same size. Genuine Trane Perfect Fit filters have only a MERV 8 rating, while these compatible Honeywell furnace f

Free shipping within the continental United States!

In stock! Ships in 1 business day.
Trane Perfect Fit Filter 24x27x5 BAYFTFR24M 3-Pack
Our Price: $144.00
Retail: $160.00
You Save 10%!

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Trane Perfect Fit Filter 21x27x5 BAYFTFR21M 3-Pack
(HTRN2127T1)

These three Honeywell air filters are compatible furnace filters that can be used as upgrades over the Trane Perfect Fit filter of the same size. Genuine Trane Perfect Fit filters have only a MERV 8 rating, while these compatible Honeywell furnace f

Free shipping within the continental United States!

Special Order. Ships in 7 days.
Trane Perfect Fit Filter 21x27x5 BAYFTFR21M 3-Pack
Our Price: $148.50
Retail: $160.00
You Save 7%!

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Trane Perfect Fit BAYFTFR24P4A Filter 24.5x28.5x1
(BAYFTFR24P4A)

The Trane Perfect Fit BAYFTFR24P4A Filter - 24.5×28.5x1 fits several air cleaner models manufactured by Trane. Featuring pleats and a depth of 1 inch, this Trane Perfect Fit filter measures approximately 24.5×28.5x1 and helps improve your overall i


In Stock! Ships in 1 to 2 business days.
Trane Perfect Fit BAYFTFR24P4A Filter 24.5x28.5x1
Our Price: $16.27
Retail: $19.99
You Save 19%!

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3M Filtrete 4 Inch Allergen Reduction Filter
(4 inch Allergen)

3M Filtrete Allergen Reduction Filter for Media Air Cleaners are the smart choice if you're looking to upgrade or retrofit the air filter in your existing HVAC system. Captures 97% of large airborne allergens like pollen, mold spores, & dust mites.


Discontinued Product Read Description.
3M Filtrete 4 Inch Allergen Reduction Filter
As Low As: $60.32
Retail: $69.99
You Save 14%!

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Trane Perfect Fit Filter 21.5x21x5 BAYFTAH21M 3-Pk
(HTRN2121T1)

These three Honeywell air filters are compatible furnace filters that can be used as upgrades over the Trane Perfect Fit filter of the same size. Genuine Trane Perfect Fit filters have only a MERV 8 rating, while these compatible Honeywell furnace f

Free shipping within the continental United States!

In stock! Ships in 1 business day.
Trane Perfect Fit Filter 21.5x21x5 BAYFTAH21M 3-Pk
Our Price: $147.00
Retail: $150.00
You Save 2%!

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Trane 21x23x5 Perfect Fit Filter BAYFTAH23M M13 x2
(FFC21235TRNM13)

The Trane 21x23x5 Perfect Fit Filter BAYFTAH23M is a compatible version of the genuine Trane Perfect fit 21x23x5 Air Filter.

Free shipping within the continental United States!

In Stock! Ships in 1 to 2 business days.
Trane 21x23x5 Perfect Fit Filter BAYFTAH23M M13 x2
Our Price: $110.00
Retail: $140.00
You Save 21%!

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Trion Trim T / Trim TX Air Cleaner Prefilter
(123324-008)

The Trion Trim T / Trim TX Air Cleaner Prefilter is an aluminum prefilter for electronic air cleaners. Trion Trim T electronic air cleaners are whole house air cleaners built for air duct system. Electricity is utilized to attract and capture dust,


Special Order. Ships in 13 days.
Trion Trim T / Trim TX Air Cleaner Prefilter
Our Price: $20.99
Retail: $29.99
You Save 30%!

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Trion Air Bear Right Angle Media Air Cleaner
(447380-010)

The Trion Air Bear Right Angle Media Air Cleaner, part number 447380-002, provides a clean and controlled indoor air environment in your home. Ideal for installations that normally require a 90 degree duct adaptor.

Free shipping within the continental United States!

Special Order. Ships in 15 days.
Trion Air Bear Right Angle Media Air Cleaner
Our Price: $121.83
Retail: $199.99
You Save 39%!

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Filters Fast 4" MERV 8 Odor Killer Filter 6-Pack
(FFOKGM4 6PACK)

The Filters Fast 4" MERV 8 Odor Killer Filter 6-Pack is a set of replacement air filters that can eliminate common odors from your home or office, including pet odors, gaseous odors, and smoke and cigarette odors. These odor killer filters utilize G

Free shipping within the continental United States!

In Stock! Ships in 10 to 11 business days.
Filters Fast 4" MERV 8 Odor Killer Filter 6-Pack
Our Price: $148.53
Retail: $199.95
You Save 26%!

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Filters Fast 5" Trane BAYFTFR21M Compatible 2-Pack
(FFC21275TRN OKGM)

The Filters Fast 5" Trane Perfect Fit BAYFTFR21M Compatible FFC21275TRN OKGM fits the following: any air cleaner that calls for a 21" x 27" x 5" filter This Filters Fast air filter also replaces the Trane Perfect Fit BAYFTFR21M filter. This Tr


In Stock! Ships in 1 to 2 business days.
Filters Fast 5" Trane BAYFTFR21M Compatible 2-Pack
Our Price: $66.66
Retail: $104.99
You Save 37%!

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Honeywell FC200E1003 MERV 13 Media Filter-16x20x5
(FC200E1003)

The Honeywell FC200E1003 Media Filter fits all Honeywell 16x20 Air Cleaners including the F200E Enviracaire Elite Series and others. Genuine Honeywell Part.


In stock! Ships in 1 business day.
Honeywell FC200E1003 MERV 13 Media Filter-16x20x5
As Low As: $75.49
Retail: $79.99
You Save 6%!

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GeneralAire AC-1 Filter 20x24x5 MERV 8 (2 PACK)
(FFC20245GAM8)

GeneralAire AC-1 Air Filter 20x24x5 is an economical alternative for the OEM GeneralAire AC-1 Air Filter 20x24x5. This furnace filter is part of the GeneralAire AC-1 Series of Residential Air Cleaner Replacement Filters.


In Stock! Ships in 12 to 13 business days.
GeneralAire AC-1 Filter 20x24x5 MERV 8 (2 PACK)
Our Price: $56.99
Retail: $79.99
You Save 29%!

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Nordyne 918394 Merv 11 Filter 2-Pack-16x22x5
(918394 Comp.)

The Nordyne 918394 Merv 11 Air Filter 2-Pack-16x22x5 scrubs the air of atmospheric and household dust, tobacco smoke, cooking smoke, grease, mold, fungi, mites, pollens and more down to 0.3 microns.


In Stock! Ships in 1 to 2 business days.
Nordyne 918394 Merv 11 Filter 2-Pack-16x22x5
Our Price: $54.99
Retail: $68.74
You Save 20%!

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Trion Air Bear Supreme 2000 Air Cleaner Merv 11
(455602-525)

The Trion Air Bear Supreme 2000 Air Cleaner Merv 11 is a whole house air cleaner that filters various airborne particles. With this Trion Air Bear cleaner you will be able to capture and hold pollutants from the air inside the filter, which will all

Free shipping within the continental United States!

In stock! Ships in 1 business day.
Trion Air Bear Supreme 2000 Air Cleaner Merv 11
Our Price: $80.00
Retail: $199.99
You Save 60%!

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Filters Fast MERV 8 20x24x5 Air Filter 2-Pack
(FFC20245GA OKGM)

The FiltersFast MERV 8 20x24x5 Air Filter can be used on Generalaire AC-1, Carrier 31MF020100, Byrant 902BXX020, and air cleaners requiring a 20"x24"x5" filter. These effective air filters remove airborne particles to provide healthier indoor air.


In Stock! Ships in 10 to 11 business days.
Filters Fast MERV 8 20x24x5 Air Filter 2-Pack
Our Price: $60.66
Retail: $69.99
You Save 13%!

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Trane Perfect Fit BAYFTFR24W1A Prefilter 24.5x27x1 6-Pack
(BAYFTFR24W1A)

The Trane BAYFTFR24W1A is a pre-filter for use in the following application: 24 1/2 inch enclosures The Trane Perfect Fit BAYFTFR24W1A Prefilter 24.5x27x1 has a nominal size of 24 1/2 inches x 27 inches x 1 inch. The actual size of this Trane


Special Order. Ships in 38 days.
Trane Perfect Fit BAYFTFR24W1A Prefilter 24.5x27x1 6-Pack
Our Price: $167.94
Retail: $179.94
You Save 7%!

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Trane Perfect Fit BAYFRAME210A Filter Kit- 21x27x5
(BAYFRAME210A)

The Trane BAYFRAME210A is an air filter kit that fits the following air cleaner model: Trane TFM210A0FR0 The Trane Perfect Fit BAYFRAME210A Filter Kit- 21x27x5 contains 1 plastic frame and 1 BAYFTFREXM expandable accordion filter. This Trane P

Free shipping within the continental United States!

Special Order. Ships in 22 days.
Trane Perfect Fit BAYFRAME210A Filter Kit- 21x27x5
Our Price: $157.72
Retail: $199.99
You Save 21%!

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FiltersFast 5" WR Compatible FFC20265WR OKGM
(FFC20265WR OKGM)

The FiltersFast 5" WR Compatible FFC20265WR OKGM is a compatible replacement air filter that is an upgrade over the White Rodgers F825-0549 air filter. The Filters Fast FFC20265WR OKGM 20" x 26" x 5" air filter can be used in several White Rodgers A


In Stock! Ships in 10 to 11 business days.
FiltersFast 5" WR Compatible FFC20265WR OKGM
Our Price: $64.66
Retail: $99.99
You Save 35%!

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Filters Fast FC100A1037 Compatible MERV 8 2-Pack
(FFC20255HON OKGM)

The Filters Fast FC100A1037 Compatible MERV 8 2-Pack is a compatible replacement air filter for the Honeywell FC100A1037 Air Filter. This two pack of Filters Fast air filters features a MERV 8 rating for the reduction of pollen, dust, pet dander,


In Stock! Ships in 10 to 11 business days.
Filters Fast FC100A1037 Compatible MERV 8 2-Pack
Our Price: $60.66
Retail: $94.99
You Save 36%!

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3M Filtrete 4 Inch Allergen Media Filter 4-pack
(4 inch Allergen 4-pack)

3M Filtrete Allergen Reduction Filter for Media Air Cleaners are the smart choice if you're looking to upgrade or retrofit the air filter in your existing HVAC system. Captures 97% of large airborne allergens like pollen, mold spores, & dust mites.

Free shipping within the continental United States!

Discontinued Product Read Description.
3M Filtrete 4 Inch Allergen Media Filter 4-pack
Our Price: $128.00
Retail: $146.00
You Save 12%!

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Filters Fast Custom Size Air Filters 6 Pack
(FFCAF)

Filters Fast Air Filters are an economical alternative if you're looking for a quality air filter without paying a premium price! Filters Fast Air Filters are now available in custom sizes! View details for order guidelines.


In Stock! Ships in 1 to 2 business days.
Filters Fast Custom Size Air Filters 6 Pack
Our Price: $40.00
Retail: $41.00
You Save 2%!

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Filters Fast - Furnace Filters

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