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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 BAYFTAH26P4A Pleated 1 inch Filter 26x21x1 4-Pack
(BAYFTAH26P4A)

The Trane BAYFTAH26P4A Pleated 1 inch Filter 26x21x1 is a furnace air filter that fits several electronic and media air cleaner models from Trane. This Trane air filter boasts a MERV 8 rating for the reduction of particulates in your air, including


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Trane BAYFTAH26P4A Pleated 1 inch Filter 26x21x1 4-Pack
Our Price: $51.80
Retail: $59.80
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Trane Perfect Fit BAYFTAH21W1A Prefilter 21.5x21x1
(BAYFTAH21W1A)

The Trane Perfect Fit BAYFTAH21W1A Prefilter 21.5x21x1 is an OEM replacement filter from Trane that features a MERV 5 rating for the reduction of airborne particulates. This Trane Perfect Fit filter fits 21 1/2" enclosures and measures approximately


Out of stock
Trane Perfect Fit BAYFTAH21W1A Prefilter 21.5x21x1
Our Price: $18.51
Retail: $19.99
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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


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Filters Fast 12x12x1 MERV 8 Filter 6-Pack
Our Price: $42.99
Retail: $49.99
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GE WP85X10004 Zoneline Air Conditioner Filter
(WP85X10004)

This GE Zoneline Air Conditioner Filter (GE WP85X10004) is a slide in replacement AC filter that removes many contaminants in your air including dust, pollen, hair, pet dander, mold spores, and more. It is used in numerous General Electric Zoneline


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GE WP85X10004 Zoneline Air Conditioner Filter
Our Price: $17.55
Retail: $19.99
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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
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Trane Perfect Fit BAYFRAME260A Filter Kit- 26x21x5
(BAYFRAME260A)

The Trane Perfect Fit BAYFRAME260A Filter Kit- 26x21x5 is a furnace air filter that can replace the Trane BAYFTAH26M PerfectFit air filter. This Trane furnace filter can be used in the TFM260A0AH1 model air cleaner and measures approximately 26" x 2

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Trane Perfect Fit BAYFRAME260A Filter Kit- 26x21x5
Our Price: $176.99
Retail: $199.99
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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

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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
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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.


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Trion Air Bear Supreme 20x20 Media Air Cleaner
Our Price: $75.99
Retail: $120.74
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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


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Honeywell FC40R1110 Air Filter 14X20x3 2-Pack
Our Price: $121.90
Retail: $139.98
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Trane BAYFRAME215A Filter Frame Kit 21.5x21x5
(BAYFRAME215A)

The Trane BAYFRAME215A is an air filter kit that fits the following air cleaner model: Trane TFM215A0AH1 The Trane BAYFRAME215A Filter Frame Kit 21.5x21x5 contains 1 plastic frame and 1 BAYFTAHEXM expandable accordion filter. This Trane Perfec

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Trane BAYFRAME215A Filter Frame Kit 21.5x21x5
Our Price: $144.18
Retail: $149.99
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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


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Trane Perfect Fit BAYFTFR24P4A Filter 24.5x28.5x1
Our Price: $16.27
Retail: $19.99
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Filters Fast 5" Trion Compatible Air Filter 2-Pack
(FFC20255TAB OKGM)

The Filters Fast 5" Trion Compatible FFC20255TAB OKGM is a compatible air filter for Trion Air Bear Air Cleaners that can replace part numbers 255649-102, 229990-002, and 229990-102. This Trion compatible filter features a MERV 8 efficiency rating


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Filters Fast 5" Trion Compatible Air Filter 2-Pack
Our Price: $69.66
Retail: $104.99
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Honeywell FC40R1185 Return Air Grille Filter 18x18
(FC40R1185)

The Honeywell FC40R1185 Return Air Grille Filter 18x18 is a replacement air filter that mounts in most return filter grilles. The Honeywell return air grille filter features four inches of depth, which provides a higher efficiency than standard one


Out of stock
Honeywell FC40R1185 Return Air Grille Filter 18x18
Our Price: $48.50
Retail: $49.99
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Vent Cover Magnetic Sheets - 3 pack (cut to fit)
(VC1)

The RPS Vent Cover Magnetic Sheets is designed to control air flow that is energy efficient and saves you money.


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Vent Cover Magnetic Sheets - 3 pack (cut to fit)
As Low As: $13.95
Retail: $19.99
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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


Discontinued Product Read Description.
FiltersFast 5" Trane BAYFTAH23M Compatible 2-Pack
Our Price: $66.66
Retail: $104.99
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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.


Discontinued Product Read Description.
GeneralAire AC-1 Filter 20x24x5 MERV 8 (2 PACK)
Our Price: $56.99
Retail: $79.99
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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

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


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Nordyne 918394 Merv 11 Filter 2-Pack-16x22x5
Our Price: $54.99
Retail: $68.74
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French Scents Air Filter Freshener - Fresh Flowers
(86117)

The French Scents Air Filter Freshener (86117 Fresh Flowers scent) is a whole home air freshener packet that is easily attached to any air filter to provide scented air throughout your entire home, business, or other indoor area.


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French Scents Air Filter Freshener - Fresh Flowers
Our Price: $2.99
Retail: $3.99
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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


Discontinued Product Read Description.
FiltersFast Trane 21x23x5 Compatible Filter 2-Pack
Our Price: $42.99
Retail: $49.95
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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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Trane BAYFRAME245A Filter Frame Kit - 24.5x27x5
(BAYFRAME245A)

The Trane BAYFRAME245A is an air filter kit that fits the following air cleaner model: Trane TFM245A0FR0 The Trane BAYFRAME245A Filter Frame Kit - 24.5x27x5 contains 1 plastic frame and 1 BAYFTFREXM expandable accordion filter. This Trane Perf

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Out of stock
Trane BAYFRAME245A Filter Frame Kit - 24.5x27x5
Our Price: $196.36
Retail: $199.95
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Trane BAYFRAME145A Filter Frame Kit - 14.5x27x5
(BAYFRAME145A)

The Trane BAYFRAME145A is an air filter kit that fits the following air cleaner model: Trane TFM145A0FR0 The Trane BAYFRAME145A Filter Frame Kit - 14.5x27x5 contains 1 plastic frame and 1 BAYFTFREXM expandable accordion filter. This Trane Perf

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Out of stock
Trane BAYFRAME145A Filter Frame Kit - 14.5x27x5
Our Price: $154.50
Retail: $169.99
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Filters Fast 10x10x1 MERV 8 Filter 6-Pack
(FFOKGM 6-PACK-10101)

The Filters Fast FFOKGM 6-PACK-10101 can be used for most air cleaners requiring 10"x10"x1" filter cartridges. These filters will significantly reduce dust, pet dander, pollen, mildew, mold and other allergens from your indoor air.


Out of stock
Filters Fast 10x10x1 MERV 8 Filter 6-Pack
Our Price: $42.99
Retail: $49.99
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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,


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Filters Fast FC100A1037 Compatible MERV 8 2-Pack
Our Price: $60.66
Retail: $94.99
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Filters Fast - Furnace Filters

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