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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.


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Air Filters product list


Honeywell FC35A1035 Furnace/ AC Air Filter 16x20x5
(FC35A1035 R)

The Honeywell FC35A1035 R is a replacement air cleaner filter that is the correct compatible replacement for the following air filter: Honeywell FC100A1003 The Honeywell FC35A1035 Furnace/ AC Air Filter 16x20x5 fits Honeywell 16 inch x 20 inch


In stock! Ships in 1 business day.
Honeywell FC35A1035 Furnace/ AC Air Filter 16x20x5
As Low As: $29.99
Retail: $49.99
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GeneralAire HMK500 Filter Replacement Kit 2-Pack 2-Pack
(4610)

The GeneralAire HMK500 is the correct replacement for the following air cleaner: GeneralAire AC500 Whole House HEPA Filtration System.


Out of stock
GeneralAire HMK500 Filter Replacement Kit 2-Pack
Our Price: $81.98

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Trane Perfect Fit BAYFTFR21P4A Filter - 21x27x1
(BAYFTFR21P4A)

The Trane Perfect Fit BAYFTFR21P4A Filter - 21x27x1 fits several air cleaner models made by Trane. This Trane furnace filter measures approximately 21" x 27" x 1" and has pleats for the purification of your indoor air. This Trane Perfect Fit filter


In stock! Ships in 1 business day.
Trane Perfect Fit BAYFTFR21P4A Filter - 21x27x1
Our Price: $20.90

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Trion Air Bear Supreme 2000 Media Air Cleaner
(455602-025)

The Trion Air Bear Supreme 2000 Media Air Cleaner, part number 455602-019, provides a clean and controlled indoor air environment in your home by removing dirt, dust, pollen and other microscopic particles from your air.


In Stock! Ships in 16 to 17 business days.
Trion Air Bear Supreme 2000 Media Air Cleaner
Our Price: $72.21
Retail: $120.74
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Filtersfast 20x20x5 for Skuttle Air Cleaner Filter 000-0448-003
(000-0448-003)

Filtersfast 20x20x5 for Skuttle 000-0448-003 Air Cleaner Filters measures 20"x20"x5", & dramatically reduces airborne particles such as dust, dust mites, pollen, mold spores, pet dander & other allergens


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Filtersfast 20x20x5 for Skuttle Air Cleaner Filter 000-0448-003
Our Price: $39.95
Retail: $50.00
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General Aire 20x25 MERV11 Filter Media GA100A37
(4356)

The GeneralAire GA100A37 MERV10 Filter Media measures 20"x25x4" approx., and is the correct replacement filter for Source 1 S1 MAC 10202505, Trion Air Bear Supreme 2000, Skuttle DBO-0025-020, Ultravation 90-007 & Honeywell FC100A1037 Air Cleaners.


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General Aire 20x25 MERV11 Filter Media GA100A37
Our Price: $30.99
Retail: $39.99
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Totaline DTLP102-2025 20x25 MERV 11 Filter
(DTLP102-2025)

The Totaline DTLP102-2025 20x25 MERV 11 Filter features a filter material that is constructed of continuous hydrophobic polyolefin fibers that will not shred or absorb moisture.


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Totaline DTLP102-2025 20x25 MERV 11 Filter
Our Price: $40.99
Retail: $49.99
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GeneralAire 4365 Comp For General Aire 16x20 MERV10 Filter
(4350)

The GeneralAire GA100A03 16x20 MERV10 Filter Media is used on Honeywell F25 Series, F35 Series, F100 Series & F150 Series Media Style Air Cleaners, as well as Honeywell FC100A1003, F100F1004, F100B1008, F100F2028, and F150E1000 Air Cleaners.


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GeneralAire 4365 Comp For General Aire 16x20 MERV10 Filter
Our Price: $33.99

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F825-0549 White Rodgers Compatible 20x26x5, 2-Pack
(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!


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F825-0549 White Rodgers Compatible 20x26x5, 2-Pack
Our Price: $72.99
Retail: $79.99
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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.

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Trion Air Bear Media AC Filter 16x25x3 6-Pack
Our Price: $99.95
Retail: $132.00
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Lennox 92X09 HEPA 40/60 Charcoal Carbon Filter
(92X09)

This Lennox Healthy Climate Filter offers efficient air-filtration performance. This Lennox HEPA 60 carbon filter should be replaced every 2-5 years.


In stock! Ships in 1 business day.
Lennox 92X09 HEPA 40/60 Charcoal Carbon Filter
Our Price: $36.70
Retail: $48.25
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Bionaire HAPF60 R Air Purifier Carbon Filter
(Bionaire HAPF60 R)

The Bionaire HAPF60 R Air Purifier Carbon Filter is a replacement air purifier filter that fits several models of Holmes air cleaners. This universal carbon pre-filter measures approximately 6.6" x 1.8" x 11.2" and helps deodorize the air through th


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Bionaire HAPF60 R Air Purifier Carbon Filter
Our Price: $10.95
Retail: $12.99
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Lennox X5425 MERV 16 Pleated Furnace Filter Media
(X5425)

This Lennox X5425 MERV 16 Pleated Furnace Filter Media is an excellent filter for someone who wants a significant upgrade over standard fiberglass filters from the hardware store. This pleated filter is a genuine MERV 16 filter.

Free shipping within the continental United States!

Special Order. Ships in 7 days.
Lennox X5425 MERV 16 Pleated Furnace Filter Media
Our Price: $100.95
Retail: $122.10
You Save 17%!

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Trion Air Bear Cub Filter 16x25x3 - 2-Pack 2-Pack
(AB316258)

The 6-Pack Trion Air Bear Cub Filter is a replacement Trion filter that works in all of your Trion Air Bear cleaners requiring a 16x25x3 size filter. Recommended by the Green Building Council, the Trion Air Bear filters replacement is a HEPA 8 filte


In stock! Ships in 1 business day.
Trion Air Bear Cub Filter 16x25x3 - 2-Pack
Our Price: $24.96

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TopTech DTT-FM-1625 16x25x4 MERV 11 Filter
(DTT-FM-1625)

The TopTech DTT-FM-1625 16x25x4 MERV 11 Filter removes many allergens, dust, pollen and other airborne pollutants.


In Stock! Ships in 1 to 2 business days.
TopTech DTT-FM-1625 16x25x4 MERV 11 Filter
Our Price: $32.99
Retail: $45.99
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Frigidaire 241575002 Replacement Air Filter
(241575002)

The Frigidaire 241575002 Replacement Air Filter fits Icon and Pure Advantage refrigerator models manufactured by Electrolux and Frigidaire. This refrigerator air filter, also known as the Frigidaire EAF1CB, uses a combination of activated carbon, ze


In stock! Ships in 1 business day.
Frigidaire 241575002 Replacement Air Filter
Our Price: $11.99
Retail: $14.99
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Hunter 30925 HEPAtech Purifier Filter
(30925)

The Hunter 30925 HEPAtech v Filter is an electrostatically-charged filter that captures 99.9% of particles as small as 0.1 microns.


Special Order. Ships in 4 days.
Hunter 30925 HEPAtech Purifier Filter
Our Price: $24.00
Retail: $34.00
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GeneralAire F1020 MERV 13 Filter Media Replacement
(4562)

The General Air F1020 MERV 13 Filter Media measures 20"x25"x4" (approx.), and is correct filter for General Aire TERSus2000 Air Purification Systems.


Special Order. Ships in 6 days.
GeneralAire F1020 MERV 13 Filter Media Replacement
Our Price: $62.91
Retail: $69.99
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Honeywell HRF-B2 Carbon PreFilter 2-Pack
(HRF-B2 1 R)

The Honeywell HRF-B2 Carbon PreFilter 2-Pack is the correct replacement for the following models of Honeywell air purifiers: HHT-090 HHT-011 HHT-145 HPA-150 HPA-050 This carbon prefilter removes mold spores, pet dander, tobacco smoke, and


In stock! Ships in 1 business day.
Honeywell HRF-B2 Carbon PreFilter 2-Pack
Our Price: $18.99
Retail: $19.99
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Trion Air Bear Supreme Filter 20x20x5 MERV11
(259112-103)

The Trion Air Bear Supreme Filter 20x20x5 MERV11 is an Air Bear filter with a MERV 11 rating and built-in frame strength. This genuine Air Bear filter boasts pre-applied gasketing on the pre-assembled filter in order to prevent air bypass. The MERV


In stock! Ships in 1 business day.
Trion Air Bear Supreme Filter 20x20x5 MERV11
Our Price: $46.99
Retail: $49.99
You Save 6%!

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Trane 24.5x27x5 BAYFTFR24M2A Comp Trane 2-Pack
(FFC245275TRN)

The Trane BAYFTFR24M2A compatible air filter captures airborne pollutants that can cause a negative impact on respiratory health


In Stock! Ships in 1 to 2 business days.
Trane 24.5x27x5 BAYFTFR24M2A Comp Trane 2-Pack
Our Price: $54.99
Retail: $59.95
You Save 8%!

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GeneralAire G99 Ventilator Filter Gage
(4002)

The GeneralAire G99 is the correct replacement for the following Ventilators: GeneralAire Whole House Ventilato


Special Order. Ships in 5 days.
GeneralAire G99 Ventilator Filter Gage
Our Price: $13.62
Retail: $49.99
You Save 73%!

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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: $99.00
Retail: $104.99
You Save 6%!

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Honeywell FC40R1094 12x12x3 Return Grille Filter
(FC40R1094)

The Honeywell FC40R1094 is a high-efficiency, replacement air filter for return grille applications. Designed to capture airborne particles that circulate through the filter. Nominal Dimension 12x12x4. Genuine Honeywell Part.


In stock! Ships in 1 business day.
Honeywell FC40R1094 12x12x3 Return Grille Filter
As Low As: $38.50
Retail: $50.00
You Save 23%!

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Trane BAYFTFR17M Perfect Fit Air Filter- 17.5x27x5 3-Pack
(HTRN1727T1)

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


In Stock! Ships in 5 to 6 business days.
Trane BAYFTFR17M Perfect Fit Air Filter- 17.5x27x5
Our Price: $141.00

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