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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


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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FiltersFast GeneralAire Compatible 20x24x5, 2-pack
(FFC20245GA)

The Filters Fast Compatible 20x24x5 MERV 11 Air Filter can be used as a replacement for GeneralAire part number 12758. Fits Generalaire AC-1 and Byrant 902BXX020.


Out of stock
FiltersFast GeneralAire Compatible 20x24x5, 2-pack
Our Price: $48.25
Retail: $49.25
You Save 2%!

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Free Flow Room Air Conditioner Filter - 15" x 24"
(93524)

This Free Flow Room Air Conditioner Filter (1777) is a universal 15" x 24" cut to fit black foam room air conditioner filter. It filters dirt, dust, soot, pollen, and other allergens.


Special Order. Ships in 8 days.
Free Flow Room Air Conditioner Filter - 15" x 24"
Our Price: $3.00
Retail: $5.99
You Save 50%!

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Trane Perfect Fit BAYFTFR17W1A Prefilter 17.5x27x1
(BAYFTFR17W1A)

The Trane Perfect Fit BAYFTFR17W1A Prefilter 17.5x27x1 is a washable filter with a MERV 5 rating that needs to be changed every 3 months for maximum efficiency. This Trane pre-filter measures approximately 17.5" x 27" x 1", is used with 17.5" enclos


Out of stock
Trane Perfect Fit BAYFTFR17W1A Prefilter 17.5x27x1
Our Price: $18.49
Retail: $19.99
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Honeywell FC40R1110 Air Filter 14X20x3 2-Pack
(FC40R1110)

The Honeywell FC40R1110 is a return air grille filter that fits the following: Any return air grille that uses a 14 inch x 20 inch x 4 inch filter The Honeywell FC40R1110 Furnace Air Filter - 14X20 has a Minimum Efficiency Reporting Value (MER


Out of stock
Honeywell FC40R1110 Air Filter 14X20x3 2-Pack
Our Price: $121.90
Retail: $139.98
You Save 13%!

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Honeywell FC40R1177 Return Grille Filter - 24x30
(FC40R1177)

The Honeywell FC40R1177 Return Grille Filter - 24x30 is a cartridge-style air filter that mounts in most return filter grilles. The Honeywell return air grille filter is constructed 4 inches thick for a higher efficiency than 1 inch filters. This Ho


Out of stock
Honeywell FC40R1177 Return Grille Filter - 24x30
Our Price: $39.95
Retail: $44.99
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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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Trion Air Bear Media AC Filter 16x25x3 6-Pack
(255649-101 6pack)

The Trion Air Bear Media AC Filter 16x25x3 part number 255649-101 is a genuine Trion Air Bear pleated media filter. The 255649101 can be used in Trion models Air Bear TM and Air Bear Cub. Replaces 229990-101 and 229990-001 as an upgrade.

Free shipping within the continental United States!

In Stock! Ships in 10 to 11 business days.
Trion Air Bear Media AC Filter 16x25x3 6-Pack
Our Price: $102.00
Retail: $132.00
You Save 23%!

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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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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 1 to 2 business days.
Filters Fast 5" Trane BAYFTAH21M Compatible 2-Pack
Our Price: $64.66
Retail: $99.99
You Save 35%!

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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 19 days.
Trion Trim T / Trim TX Air Cleaner Prefilter
Our Price: $20.99
Retail: $29.99
You Save 30%!

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F825-0549 White Rodgers Compatible 20x26x5, 2pk
(FFC20265WR)

The Filters Fast Compatible 20x26x5 MERV 11 Air Filter can be used as an upgrade for White Rodgers part number F825-0549. Upgrade your White Rodgers Media Filter today and get a better filter for the same price as the original manufacturer's brand!


In Stock! Ships in 1 to 2 business days.
F825-0549 White Rodgers Compatible 20x26x5, 2pk
Our Price: $72.99
Retail: $79.99
You Save 9%!

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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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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 1 to 2 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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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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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!

Out of stock
Trane Perfect Fit Filter 21.5x21x5 BAYFTAH21M 3-Pk
Our Price: $147.00
Retail: $150.00
You Save 2%!

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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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Trion Air Bear Supreme 1400 Media Air Cleaner
(455602-119C)

The Trion Air Bear Supreme 1400 Media Air Cleaner, part number 455602-119C, provides a clean and controlled indoor air environment in your home by removing dirt, dust, pollen and other microscopic particles and other microscopic particles.


Special Order. Ships in 35 days.
Trion Air Bear Supreme 1400 Media Air Cleaner
Our Price: $76.15
Retail: $120.75
You Save 37%!

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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 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.


Discontinued Product Read Description.
Filters Fast 20x20x5 Trion Compatible Filter 2PACK
Our Price: $39.99
Retail: $94.99
You Save 58%!

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Trion Air Bear Right Angle Air Cleaner Merv 11
(447380-510)

The 447380-510 is the correct air cleaner that uses: 5" thick electrostatically charged pleated filter media.

Free shipping within the continental United States!

In Stock! Ships in 10 to 11 business days.
Trion Air Bear Right Angle Air Cleaner Merv 11
Our Price: $129.99
Retail: $149.99
You Save 13%!

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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 to 2 business days.
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 13 (2 PACK)
(FFC20245GAM13)

The GeneralAire AC-1 Air Filter 20x24x5 is a cost-effective compatible version of the genuine 20x24x5 General Filter AC-1 Air Filters.


Discontinued Product Read Description.
GeneralAire AC-1 Filter 20x24x5 MERV 13 (2 PACK)
Our Price: $60.00
Retail: $80.00
You Save 25%!

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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


Out of stock
Filters Fast 12x12x1 MERV 8 Filter 6-Pack
Our Price: $42.99
Retail: $49.99
You Save 14%!

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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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Filters Fast - Furnace Filters

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