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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 21x23.5x5 Perfect Fit BAYFTAH23M Filter 2pk
(FFC23205TRNM8)

For an economical compatible version of the genuine OEM Trane BAYFTAH23M 21x23.5x5 Perfect Fit Filter, try this MERV 8 Trane 21x23.5x5 Perfect Fit BAYFTAH23M replacement filter.


Discontinued Product Read Description.
Trane 21x23.5x5 Perfect Fit BAYFTAH23M Filter 2pk
Our Price: $50.00
Retail: $70.00
You Save 29%!

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Electrostatic Throw Away Filter 15X25 (cut to fit)
(EAC2)

The Electrostatic Throw Away Filter is a cut-to-fit HEPA air filter that is designed to eliminate unpleasant odors.


Discontinued Product Read Description.
Electrostatic Throw Away Filter 15X25 (cut to fit)
Our Price: $4.99
Retail: $6.99
You Save 29%!

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Kitchen/Bath Vent Filter Kit
(VC-K)

The Kitchen/Bath Vent Filter Kit is an easy-to-install vent filter that absorbs unpleasant smoke, cooking and musty odors lurking in your kitchen or bathroom.


Discontinued Product Read Description.
Kitchen/Bath Vent Filter Kit
Our Price: $4.99
Retail: $7.99
You Save 38%!

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Baby's Room Vent Filter Kit
(VC-B)

The BestAir Baby's Room Vent Filter is a large 12" x 14" cut-to-fit, electrostatic and carbon filter that helps to reduce airborne pollutants such as pollen, dust, dirt, bacteria, mold spores, pet dander and hair.


Discontinued Product Read Description.
Baby's Room Vent Filter Kit
Our Price: $5.99
Retail: $7.99
You Save 25%!

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BestAir Family Room/Bedroom Vent Filter Kit
(VC-F)

The BestAir Family Room/Bedroom Vent Filter Kit is an easy to install, cut-to-fit filter designed to reduce airborne pollutants like dust, pet dander, dirt, pollen, hair and other allergens.


Discontinued Product Read Description.
BestAir Family Room/Bedroom Vent Filter Kit
Our Price: $5.99
Retail: $7.99
You Save 25%!

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Bestair All Rooms Vent Filter Kit
(VC-A)

The BestAir All Rooms Vent Filter Kit has a great prefilter for furnace and air cleaners to reduce airborne particles and pollutants such as pet dander, dust, pollen, dirt, hair and other fibers.


Discontinued Product Read Description.
Bestair All Rooms Vent Filter Kit
Our Price: $5.99
Retail: $7.99
You Save 25%!

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Holmes HAPF30D Comp Single Replacement HEPA Filter
(HAPF30D)

The Holmes HAPF30D compatible single Replacement HEPA Filter removes up to 99% of airborne dust and pollen, in addition to reducing pet dander, smoke and mold spores.


Discontinued Product Read Description.
Holmes HAPF30D Comp Single Replacement HEPA Filter
Our Price: $15.24
Retail: $29.99
You Save 49%!

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Hunter 30943 QuietFlo HEPA Purifier Filter
(30943)

The Hunter 30943 QuietFlo HEPA Purifier Filter is an electrostatically-charged filter that captures 99.9% of particles as small as 0.3 microns.


Discontinued Product Read Description.
Hunter 30943 QuietFlo HEPA Purifier Filter
Our Price: $63.95
Retail: $69.95
You Save 9%!

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Hunter 30944 QuietFlo HEPA Purifier Filter
(30944)

The Hunter 30944 QuietFlo HEPA Purifier Filter is an electrostatically-charged filter that captures 99.9% of particles as small as 0.1 microns.


Discontinued Product Read Description.
Hunter 30944 QuietFlo HEPA Purifier Filter
Our Price: $39.99
Retail: $64.99
You Save 38%!

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3M Filtrete FAPF00 Air Filter for FAP00 Purifier
(FAPF00)

The 3M Filtrete FAPF00 Air Filter is the replacement air filter for the 3M Filtrete Ultra Quiet Air Purifier (FAP00-RS) for small rooms. This 3M Filtrete Air Filter captures 96% of pollen, mold spores, dust mites, dust, bacteria and particles.


Discontinued Product Read Description.
3M Filtrete FAPF00 Air Filter for FAP00 Purifier
As Low As: $13.50
Retail: $15.99
You Save 16%!

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Odor Killer Return Grille Air Filter - MERV 8, 5"
(FFRAGGM)

The Odor Killer Return Grille Air Filter eliminates smoke odors, cigarette odors, pet odors, gases and other contaminants from your indoor air. Since this return grille air filter is 5" deep compared to the standard 1" air filter, its greater surfac


In Stock! Ships in 1 to 2 business days.
Odor Killer Return Grille Air Filter - MERV 8, 5"
Our Price: $28.99
Retail: $45.99
You Save 37%!

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Filters Fast Odor Killer Air Filter, 12-pack
(FFOKM8)

The Filters Fast Odor Killer is a MERV 8 two-stage carbon blended filter designed to "kill" odors such as cigarette smoke, pet odors, irritating gases, cooking odors and other bad odors that might be affecting your indoor air quality.


Discontinued Product Read Description.
Filters Fast Odor Killer Air Filter, 12-pack
Our Price: $99.00
Retail: $100.00
You Save 1%!

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Filtrete FAPF04 Air Filter, For Ultra-Slim FAP-04R
(FAPF04)

The Filtrete FAPF04 Air Filter is the replacement air cleaning filter for the Filtrete Ultra Slim Air Purifier FAP04-RC, FAP04. This electrostatically charged filter will attract and retain microparticles that can aggravate allergies and ...


Discontinued Product Read Description.
Filtrete FAPF04 Air Filter, For Ultra-Slim FAP-04R
Our Price: $19.99
Retail: $20.46
You Save 2%!

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Hunter 30900 HEPAtech Purifier Filter
(30900)

The Hunter 30900 HEPAtech Purifier Filter is an electrostatically-charged filter that captures 99.9% of particles as small as 0.1 microns. It fits the HEPAtech 300-30300 and 302-30302 air filters.


Discontinued Product Read Description.
Hunter 30900 HEPAtech Purifier Filter
As Low As: $22.49
Retail: $36.95
You Save 39%!

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Honeywell Replacement HEPA Filter, 28725
(28725)

The Honeywell 28725 Replacement HEPA Filter fits Honeywell models 17450 and 43300. Genuine Honeywell Part.


Discontinued Product Read Description.
Honeywell Replacement HEPA Filter, 28725
Our Price: $67.99
Retail: $110.00
You Save 38%!

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Filters Fast Odor Killer Air Filter, 6-pack
(FFOK 6-pack)

The Filters Fast Odor Killer is a MERV 8 two-stage carbon blended filter designed to "kill" odors such as cigarette smoke, pet odors, irritating gases, cooking odors and other bad odors that might be affecting your indoor air quality.


In Stock! Ships in 1 to 2 business days.
Filters Fast Odor Killer Air Filter, 6-pack
Our Price: $76.67
Retail: $79.99
You Save 4%!

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Filters Fast MERV 13 Return Grille Air Filter - 5"
(FFRAG13)

Protect your health, your environment and your wallet with a Filters Fast MERV 13 Return Grille Air Filter. MERV 13 is one of the highest efficiency ratings available, and Filters Fast now offers this rating in a 5" Return Air Grille application.


Discontinued Product Read Description.
Filters Fast MERV 13 Return Grille Air Filter - 5"
Our Price: $39.99
Retail: $49.99
You Save 20%!

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Filters Fast Odor Killer Return Air Grille Filter
(FFRAGOK)

Filters Fast now offers its 5" Return Air Grille Filters with Odor Killer technology, a MERV 8 two-stage carbon blended filter designed to "kill" odors. FFRAGOK.


Discontinued Product Read Description.
Filters Fast Odor Killer Return Air Grille Filter
Our Price: $45.00
Retail: $59.99
You Save 25%!

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Holmes HAPF38 HEPA Filter Replacement (HAPF38CS)
(HAPF38)

The Holmes HAPF38CS HEPA Filter, which fits Holmes air purifier model HAP292, removes airborne allergens and reduces unwanted smells and odors by capturing fine particulates that float in the air.


Discontinued Product Read Description.
Holmes HAPF38 HEPA Filter Replacement (HAPF38CS)
Our Price: $46.99
Retail: $54.99
You Save 15%!

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Filters Fast MERV 11 Return Grille Air Filter 5"
(FFRAGF)

The Filters Fast MERV 11 Return Grille Air Filter 5" are a great option for upgrading or replacing the traditional 1-inch air filter found in your home or office. View details to learn more...


In Stock! Ships in 12 to 13 business days.
Filters Fast MERV 11 Return Grille Air Filter 5"
Our Price: $29.99
Retail: $39.99
You Save 25%!

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Filtrete FAP04-RC Ultra-Slim Air Purifier
(FAP04-RC)

The Filtrete FAP04-RC Ultra-Slim Air Purifier is only 4 inches thick so it can fit virtually anywhere in your home or office where cleaner air is needed! Its sleek design and features make this a desirable upgrade those looking to improve indoor air

Free shipping within the continental United States!

Discontinued Product Read Description.
Filtrete FAP04-RC Ultra-Slim Air Purifier
Our Price: $189.00
Retail: $199.99
You Save 5%!

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Bionaire Everfesh Air Filter - Bionaire APF20
(APF20)

The Bionaire APF20 Filter is the washable pre-filter for the Bionaire BAP336-MU Everfresh Air Exchange System. The Bionaire Everfresh Air Exchange System is an easy-to-install window unit that cycles in clean, fresh air, while cycling out undesirab


Discontinued Product Read Description.
Bionaire Everfesh Air Filter - Bionaire APF20
Our Price: $3.99
Retail: $5.00
You Save 20%!

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Filtrete Advanced Allergen (Deep Blue) 6-pack
(Advanced Allergen 6pack)

The Advanced Allergen Air Filter is the newest, most advanced high-performance filter from Filtrete. No Competitor's #1 Filter Performs Better! It even out performs the Filtrete Ultra Allergen--previously the #1 Performance Filter on the Market.

Free shipping within the continental United States!

Discontinued Product Read Description.
Filtrete Advanced Allergen (Deep Blue) 6-pack
Our Price: $110.00
Retail: $126.00
You Save 13%!

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3M Filtrete 4 Inch Allergen Media Filter 4-pack
(4 inch Allergen 4-pack)

3M Filtrete Allergen Reduction Filter for Media Air Cleaners are the smart choice if you're looking to upgrade or retrofit the air filter in your existing HVAC system. Captures 97% of large airborne allergens like pollen, mold spores, & dust mites.

Free shipping within the continental United States!

Discontinued Product Read Description.
3M Filtrete 4 Inch Allergen Media Filter 4-pack
Our Price: $128.00
Retail: $146.00
You Save 12%!

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Holmes HAPF58 HEPA Filter
(HAPF58)

The Holmes HAPF58 HEPA Filter is designed to fit Holmes HAP580 Air Filter and trap microscopic allergens and dust. Guaranteed HEPA filter efficiency over 99.97 % at 0.3 microns.

Free shipping within the continental United States!

Discontinued Product Read Description.
Holmes HAPF58 HEPA Filter
Our Price: $123.99
Retail: $130.19
You Save 5%!

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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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