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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.

Filters Fast furnace air filters offer an affordable option to excellent indoor air quality. These replacement home furnace filters will cost you much less than what you will save on your energy efficiency.


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Filters Fast Furnace Filters product list


Trane 24x26x5 Perfect Fit BAYFTFR24M Filter 2pk
(FFC24265TRNM8)

The Trane MERV 8 24x26x5 Perfect Fit BAYFTFR24M Filter is the compatible alternative of the genuine OEM 24x26x5 Trane Perfect Fit BAYFTFR24M Filter.


In Stock! Ships in 1 to 2 business days.
Trane 24x26x5 Perfect Fit BAYFTFR24M Filter 2pk
Our Price: $50.00
Retail: $70.00
You Save 29%!

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Aprilaire SpaceGard 2400 Air Filter - MERV 8 2pk
(FFC162766SGM8)

The Aprilaire SpaceGard 2400 Air Filter is an economical compatible alternative for the Aprilaire SpaceGard 2400 Air Cleaner Systems requiring a 16x27x6 media filter.


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Aprilaire SpaceGard 2400 Air Filter - MERV 8 2pk
Our Price: $42.99
Retail: $50.00
You Save 14%!

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Filters Fast 4-inch MERV 8 Air Filters 6-Pack
(FFM8PLEAT 4)

The Filters Fast 4-inch MERV 8 4"Air Filters 6-pack is compatible with: Aprilaire Space-Gard Trion Air Bear Honeywell and other top name brand air conditioning filters. Usable in residential, commercial, and industrial applications, the


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Filters Fast 4-inch MERV 8 Air Filters 6-Pack
Our Price: $62.99
Retail: $69.99
You Save 10%!

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FiltersFast 5" Trane BAYFTAH26M Compatible 2-Pack
(FFC26215TRN OKGM)

The Filters Fast 5" Trane PF BAYFTAH26M Compatible FFC26215TRN OKGM fits the following: Any air cleaner that requires a 26" x 21" x 5" filter This Filters Fast air filter is also compatible with the Trane Perfect Fit BAYFTAH26M air filter. Thi


In Stock! Ships in 10 to 11 business days.
FiltersFast 5" Trane BAYFTAH26M Compatible 2-Pack
Our Price: $68.66
Retail: $109.99
You Save 38%!

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Trane 21.5x21x5 Perfect Fit Filter BAYFTAH21M M13
(FFC215215TRNM13)

The Trane 21.5x21x5 Perfect Fit Filter BAYFTAH21M is a compatible economical alternative for the genuine Trane 21.5x21x5 Perfect Fit Filter that comes in a 2-pack value set.

Free shipping within the continental United States!

In Stock! Ships in 1 to 2 business days.
Trane 21.5x21x5 Perfect Fit Filter BAYFTAH21M M13
Our Price: $110.00
Retail: $140.00
You Save 21%!

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Trion 16x25x5 Air Bear Furnace Filter MERV 13 2pk
(FFC16255TABM13)

The Trion 16x25x5 Air Bear Furnace Filter is the compatible version of the genuine Trion Air Bear Media AC Filter 16x25x5, 255649-105.


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Trion 16x25x5 Air Bear Furnace Filter MERV 13 2pk
Our Price: $93.00
Retail: $100.00
You Save 7%!

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Trion 16x25x3 Air Bear Cub Filter - MERV 13 3-Pack
(FFC16253TABM13)

The 16x25x3 Trion Air Bear Cub Filter is a compatible version of the genuine Trion Air Bear Media AC Filter 16x25x3, 255649-101.


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Trion 16x25x3 Air Bear Cub Filter - MERV 13 3-Pack
Our Price: $83.00
Retail: $100.00
You Save 17%!

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Filters Fast MERV 8 Pleated 1" Panel Filter 6-Pack
(FFM8PLEAT1)

The Filters Fast MERV 8 Pleated 1" Panel Filter 6-Pack is a set of replacement air filters for ideal use as service pleats or prefilters in commercial HVAC systems or industrial air cleaners. These pleated media filters arrive in a 6 pack and are ef


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Filters Fast MERV 8 Pleated 1" Panel Filter 6-Pack
Our Price: $36.99
Retail: $49.99
You Save 26%!

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Honeywell FC100A1003 MERV 13 Comp. Filter-16x20x5
(FFC16205HONM13)

The Filters Fast FFC16205HONM13 compatible air filter replaces the Honeywell FC100A1003 and effectively reduces indoor air contaminants using a deep pleated filter media.


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Honeywell FC100A1003 MERV 13 Comp. Filter-16x20x5
Our Price: $56.95
Retail: $64.95
You Save 12%!

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F825-0548 White Rodgers Compatible 16x26x5, 2pk
(FFC16265WR)

The Filters Fast Compatible 16x26x5 MERV 11 Air Filter can be used as an upgrade for White Rodgers part number F825-0548. Upgrade your White Rodgers Media Filter today and get a better filter for the same price as the original manufacturer's brand!


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F825-0548 White Rodgers Compatible 16x26x5, 2pk
Our Price: $54.25
Retail: $55.25
You Save 2%!

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Trane 21x27x5 Perfect Fit Filter BAYFTFR21M M13 x2
(FFC21275TRNM13)

The Trane 21x27x5 Perfect Fit Filter BAYFTFR21M is an economical compatible version of the genuine Trane 21x27x5 Perfect Fit Air Filter.

Free shipping within the continental United States!

In Stock! Ships in 1 to 2 business days.
Trane 21x27x5 Perfect Fit Filter BAYFTFR21M M13 x2
Our Price: $110.00
Retail: $140.00
You Save 21%!

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Filters Fast 12x12x1 MERV 8 Filter 6-Pack
(FFOKGM 6-PACK-12121)

The Filters Fast FFOKGM 6-PACK-12121 is an Odor Killer Grey Matter filter that works to remove the following from your indoor air: Smoke odors Cigarette odors Pet odors Gases Other contaminants Pollen Dust Pet Dander Mold Mildew Other


In Stock! Ships in 10 to 11 business days.
Filters Fast 12x12x1 MERV 8 Filter 6-Pack
Our Price: $42.99
Retail: $49.99
You Save 14%!

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Filters Fast 20x20x5 Trion Compatible Filter 2PACK
(FFC20205TAB OKGM)

The FiltersFast 20x20x5 Trion Compatible Filter can be used Trion AirBear and other air cleaners requiring 20"x20"x5" filter cartridges. They remove airborne particles such as pollen, dust, dander, dust, and other allergens from your indoor air.


In Stock! Ships in 10 to 11 business days.
Filters Fast 20x20x5 Trion Compatible Filter 2PACK
Our Price: $39.99
Retail: $94.99
You Save 58%!

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Trane 24x26x5 Perfect Fit Filter BAYFTFR24M M13 x2
(FFC24265TRNM13)

For an economical compatible version of the genuine 24x26x5 Trane Perfect Fit BAYFTFR24M Filter, try this Trane 24x26x5 Perfect Fit Filter BAYFTFR24M with a MERV 13 energy efficiency rating.

Free shipping within the continental United States!

In Stock! Ships in 1 to 2 business days.
Trane 24x26x5 Perfect Fit Filter BAYFTFR24M M13 x2
Our Price: $110.00
Retail: $140.00
You Save 21%!

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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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White Rodgers 20x26x5 Filter F825-0549 MERV 13 2pk
(FFC20265WRM13)

The White Rodgers 20x26x5 Air Filter F825-0549 is a compatible alternative that's a part of the White Rodgers F825 Series residential air cleaner replacement filters.


In Stock! Ships in 1 to 2 business days.
White Rodgers 20x26x5 Filter F825-0549 MERV 13 2pk
Our Price: $80.00
Retail: $100.00
You Save 20%!

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FiltersFast 5" Trane BAYFTAH23M Compatible 2-Pack
(FFC23205TRN OKGM)

The Filters Fast 5" Trane PF BAYFTAH23M Compatible FFC23205TRN OKGM fits the following: any air cleaner that calls for a 20" x 23" x 5" filter This Filters Fast air filter also replaces the Trane Perfect Fit BAYFTAH23M filter. This Trane compa


In Stock! Ships in 10 to 11 business days.
FiltersFast 5" Trane BAYFTAH23M Compatible 2-Pack
Our Price: $66.66
Retail: $104.99
You Save 37%!

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Honeywell FC100A1003 MERV 8 Comp. Filter-16x20x5
(FFC16205HONM8)

The Filters Fast FFC16205HONM8 compatible air filter replaces the Honeywell FC100A1003 and utilizes an extra deep pleated media for greater filtration capacities.


In Stock! Ships in 1 to 2 business days.
Honeywell FC100A1003 MERV 8 Comp. Filter-16x20x5
Our Price: $39.95
Retail: $49.95
You Save 20%!

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Filters Fast MERV 8 16x27x6 Air Filter 2-Pack
(FFC162766SG OKGM)

The Filters Fast MERV 8 16x27x6 Air Filter 2-Pack is a pack of replacement air filters that is an upgrade over the Aprilaire Space Gard 2400 AC Filter. This 16" x 27" 6" has a MERV 8 rating for the reduction of airborne pollutants like pollen, dir


In Stock! Ships in 10 to 11 business days.
Filters Fast MERV 8 16x27x6 Air Filter 2-Pack
Our Price: $46.96
Retail: $49.31
You Save 5%!

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FiltersFast Trane 21x23x5 Compatible Filter 2-Pack
(FFC21235TRN OKGM)

The Filters Fast 5" Trane Perfect Fit 21x23x5 Compatible FFC21235TRN OKGM is the correct replacement for the following: any air cleaner that requires a 21" x 23" x 5" filter This Filters Fast air filter also replaces Trane Perfect Fit BAYFTAH23


In Stock! Ships in 10 to 11 business days.
FiltersFast Trane 21x23x5 Compatible Filter 2-Pack
Our Price: $42.99
Retail: $49.95
You Save 14%!

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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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Filters Fast 16x25x5 MERV 8 Air Filter 2-Pack
(FFC16255HON OKGM)

The Filters Fast 16x25x5 MERV 8 Air Filter 3-Pack is a replacement pack of compatible air filters that is an upgrade the Honeywell FC100A1029 and Carrier FILCCCAR0016 air filters. This 3 pack of 16" x 25" x 5" filters features a MERV 8 rating and


In Stock! Ships in 10 to 11 business days.
Filters Fast 16x25x5 MERV 8 Air Filter 2-Pack
Our Price: $60.66
Retail: $94.99
You Save 36%!

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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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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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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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