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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


Trane Perfect Fit BAYFTFR17M Compat. 17.5x27x5 2pk
(FFC175275TRN)

These MERV 11 Furnace Filters are compatible upgrades over Trane Perfect Fit Air Filters. These Filters Fast Air Filters specifically replace Trane part number BAYFTFR17M or FLR06069, which is a 17.5x27x5 Air Filter used in several Trane Air Cleaner.


In Stock! Ships in 1 to 2 business days.
Trane Perfect Fit BAYFTFR17M Compat. 17.5x27x5 2pk
Our Price: $69.99
Retail: $99.99
You Save 30%!

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Honeywell PopUp Collapsable Air Filter - MERV 11 12-Pack
(Honeywell PopUp)

The Honeywell PopUp replacement air filter media is available in several sizes and features a MERV 11 rating. Installers and homeowners can save space and money. Filter is compatible with Aprilaire cabinets.


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Honeywell PopUp Collapsable Air Filter - MERV 11
Our Price: $420.00

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White Rodgers 20x26x5 F825-0549 MERV 8 2-Pack
(FFC20265WRM8)

The White Rodgers 20x26x5 Air Filter F825-0549 is a compatible alternative for the OEM White Rodgers 20x26x5 Air Filter. This filter is made of fine carbon powder bonded to lofted polyester media for odor reduction.


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White Rodgers 20x26x5 F825-0549 MERV 8 2-Pack
Our Price: $40.99
Retail: $50.00
You Save 18%!

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Honeywell 50000293-004 Post Filter 12.5x20 2-Pack
(50000293-004)

The Honeywell 50000293-004 Post Filter 12.5x20 2-Pack is a replacement post filter for the 20x25 and 20x12.5 F300E and F50F air cleaners. The Honeywell post filter increases the efficiency of your Honeywell electronic air purifier model and has only


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Honeywell 50000293-004 Post Filter 12.5x20 2-Pack
Our Price: $40.09
Retail: $44.99
You Save 11%!

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Lennox X8788 MERV 16 PureAir Filter Replacement
(X8788)

The Lennox X8788 MERV 16 filter is made for your PureAir PC020-28 unit. Also known as a healthy climate filter, this pleated filter will remove harmful airborne contaminants from your home. If you or your family members suffer from asthma or allergi

Free shipping within the continental United States!

In stock! Ships in 1 business day.
Lennox X8788 MERV 16 PureAir Filter Replacement
Our Price: $102.67
Retail: $109.99
You Save 7%!

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Carrier GAPCCCAR2420 Air Purifier Filter
(GAPCCCAR2420)

The Carrier GAPCCCAR2420 Air Purifier Filter is a genuine OEM factory replacement air filter for the Carrier Infinity Air Purifier, Bryant Perfect Air Purifier, as well as other compatible air purifiers made by BDP, Payne, Day and Night Infinity, an


In stock! Ships in 1 business day.
Carrier GAPCCCAR2420 Air Purifier Filter
Our Price: $92.27
Retail: $119.99
You Save 23%!

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4Pack Trion Air Bear Supreme Filter 20x20x5 MERV11
(259112-103 4pack)

The 259112-103 is the correct filter replacement for the following Trion Air Bear and Air Bear Supreme air cleaning systems.


Out of stock
4Pack Trion Air Bear Supreme Filter 20x20x5 MERV11
Our Price: $52.76
Retail: $89.99
You Save 41%!

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Trane Perfect Fit BAYFTFR21M Compat 21x27x5 2pk
(FFC21275TRNM11)

These MERV 11 compatible Furnace Filters are replacement filters for Trane Perfect Fit Air Filters. These Filters Fast Air Filters replace Trane part number BAYFTFR21M or FLR06070 , which is used in several Trane Air Cleaner models.


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Trane Perfect Fit BAYFTFR21M Compat 21x27x5 2pk
Our Price: $99.00
Retail: $100.00
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Aprilaire SpaceGard 2400 Air Filter MERV 8 2-Pack
(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 2-Pack
Our Price: $42.99
Retail: $50.00
You Save 14%!

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Filtrete Dust & Pollen Furnace Filter (Light Blue)
(Dust and Pollen)

The Filtrete Dust & Pollen Furnace Filter is the right choice if you're looking for an economical upgrade from cheap 1 month furnace filters. The Filtrete "Blue Filter" features electrostatically charged fibers and is ideal for high-velocity..


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Filtrete Dust & Pollen Furnace Filter (Light Blue)
Our Price: $12.99
Retail: $14.99
You Save 13%!

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Carrier GAPCCCAR1620 Air Purifier Filter
(GAPCCCAR1620)

The Carrier GAPCCCAR1620Air Purifier Filter is a genuine OEM factory replacement air filter for the Carrier Infinity Air Purifier, Bryant Perfect Air Purifier, as well as other compatible air purifiers made by BDP, Payne, and Totaline (models GAPAA


In stock! Ships in 1 business day.
Carrier GAPCCCAR1620 Air Purifier Filter
Our Price: $84.24
Retail: $84.99
You Save 1%!

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Trane Perfect Fit BAYFTAH26M2A Filter 26x21x5
(BAYFTAH26M2A)

The Trane Perfect Fit BAYFTAH26M2A Filter 26x21x5 is a furnace air filter that fits several high efficiency air cleaners from Trane. This Trane air filter boasts a MERV 8 rating for the reduction of particulates in your air, including dust, dirt, an


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Trane Perfect Fit BAYFTAH26M2A Filter 26x21x5
Our Price: $44.16
Retail: $49.99
You Save 12%!

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Hunter 30973 - Germicidal Replacement Air Filter
(30973)

The Hunter 30973 - Germicidal Replacement Air Filter is a replacement HEPA air filter for the Hunter Model 30890, 30891, 30892, 30895, and 30405 Air Purifiers. This Hunter air filter replacement features HEPA-type media with electricity applied thro


In stock! Ships in 1 business day.
Hunter 30973 - Germicidal Replacement Air Filter
Our Price: $39.99
Retail: $49.99
You Save 20%!

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Lennox X8790 MERV 16 Air Filter Replacement
(X8790)

The Lennox X8790 MERV 16 Air Filter Replacement is a replacement air filter for the Lennox PCO14-23 PureAir Air Filtration System. This furnace filter measures approximately 20" x 21" x 5" and features a MERV 16 rating. A higher MERV rating results


In stock! Ships in 1 business day.
Lennox X8790 MERV 16 Air Filter Replacement
Our Price: $96.00
Retail: $229.00
You Save 58%!

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Trane BAYFTAHEXM2 Expandable Replacement Media
(BAYFTAHEXM2)

The Trane BAYFTAHEXM2 Expandable Replacement Media is a set of two furnace air filters that require the use of a Retrofit Frame Kit to be operable. This Trane Perfect Fit filter measures approximately 20 inches in length and 5 inches in thickness. T


In stock! Ships in 1 business day.
Trane BAYFTAHEXM2 Expandable Replacement Media
Our Price: $69.20
Retail: $79.99
You Save 13%!

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Trane Perfect Fit BAYFTFR17P4A Filter-17.5x27x1
(BAYFTFR17P4A)

The Trane Perfect Fit BAYFTFR17P4A Filter - 17.5x27x1 fits several air cleaner models manufactured by Trane. This Trane Perfect Fit filter is 1 inch and pleated for maximum purification of your air. This Trane furnace filter measures approximately 1


In stock! Ships in 1 business day.
Trane Perfect Fit BAYFTFR17P4A Filter-17.5x27x1
Our Price: $16.52
Retail: $19.99
You Save 17%!

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Trane Perfect Fit BAYFTFR24M 24.5x27x5 2-Pack
(FFC24265TRN)

These MERV 11 Furnace Filters are compatible upgrades over Trane Perfect Fit Air Filters. These Filters Fast Air Filters specifically replace Trane part number BAYFTFR24M, which is a 24.5x27x5 Air Filter used in several Trane Air Cleaner models.


In Stock! Ships in 1 to 2 business days.
Trane Perfect Fit BAYFTFR24M 24.5x27x5 2-Pack
Our Price: $98.00
Retail: $111.00
You Save 12%!

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3M Filtrete Dust & Pollen Furnace Filter 6-Pack LB
(Dust and Pollen 6-Pk)

The 3M Filtrete Dust & Pollen Furnace Filter is an electrostatically charged furnace filter ideal for high velocity HVAC systems. 3M Filtrete filters are an economical upgrade from cheap one month filters.


In Stock! Ships in 9 to 10 business days.
3M Filtrete Dust & Pollen Furnace Filter 6-Pack LB
Our Price: $57.25
Retail: $60.11
You Save 5%!

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Aprilaire SpaceGard 2200 Air Filter MERV 8 2-Pack
(FFC20256SGM8)

The Aprilaire SpaceGard 2200 Air Filter is an economical alternative for the OEM Aprilaire 2200 and 2250 Air Filter Media Replacement.


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Aprilaire SpaceGard 2200 Air Filter MERV 8 2-Pack
Our Price: $55.99
Retail: $59.99
You Save 7%!

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Hunter 30920 HEPAtech Air Purifier Filter
(30920)

The Hunter 30920 HEPAtech Purifier Filter is an electrostatically-charged filter that captures 99.9% of particles as small as 0.1 microns.


In stock! Ships in 1 business day.
Hunter 30920 HEPAtech Air Purifier Filter
As Low As: $18.49
Retail: $29.95
You Save 38%!

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Lennox X8311 MERV 10 Expandable Filter Replacement
(X8311)

The Lennox X8311 is the correct filter for the following air cleaner: Lennox Healthy Climate HCXF14 Air Filtration System


Special Order. Ships in 11 days.
Lennox X8311 MERV 10 Expandable Filter Replacement
Our Price: $32.39
Retail: $38.71
You Save 16%!

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Honeywell 20x25x5 Filter FC100A1037 MERV 8 2-Pack
(FFC20255HONM8)

The Honeywell 20x25x5 Filter FC100A1037 is the compatible version of the OEM Honeywell 20x25x5 Air Filter FC100A1037.


In Stock! Ships in 1 to 2 business days.
Honeywell 20x25x5 Filter FC100A1037 MERV 8 2-Pack
Our Price: $37.99
Retail: $60.00
You Save 37%!

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Holmes HAPF21, 9000436 Replacement Filter
(HAPF21)

The Holmes HAPF21 Replacement Filter is the main HEPA filter in Holmes models HAP222, HAP221, HAP220, HAP223, and HAP2234. Also known as part number HAPF21CS.


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Holmes HAPF21, 9000436 Replacement Filter
Our Price: $10.00
Retail: $11.00
You Save 9%!

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Carrier EXPXXFIL0016 EZ-FLEX Air Purifier Filter
(EXPXXFIL0016)

The Carrier EXPXXFIL0016 Air Purifier Filter is a genuine OEM factory replacement air filter for Bryant, Carrier, Payne, Day-Night, as well as certain Honeywell, Space-Gard, and Trion air purifiers. It will fit many compatible air purifiers includin


In stock! Ships in 1 business day.
Carrier EXPXXFIL0016 EZ-FLEX Air Purifier Filter
Our Price: $51.98
Retail: $69.99
You Save 26%!

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Hunter 30901 Carbon Purifier Pre-Filter
(30901)

The Hunter 30901 Carbon Pre-Filter fits all Hunter QuietFlo and HEPAtech purifiers. The 30901 Carbon Pre-Filter's activated charcoal absorbs odors from pets, smoking, cooking and more.


In stock! Ships in 1 business day.
Hunter 30901 Carbon Purifier Pre-Filter
As Low As: $18.50
Retail: $27.95
You Save 34%!

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Filters Fast - Air Filters

" Thank you for your expert service when helping me get the proper filters for my old pool and filter system. The new ones are perfect and work very well. All the best! " - Jim, Alamo, CA
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