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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 full product list:


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.


Discontinued Product Read Description.
Holmes HAPF21, 9000436 Replacement Filter
Our Price: $11.00

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Lennox Healthy Climate 75X66 Catalyst Insert Assembly
(75X66)

The Lennox 75X66 Metal Mesh Filter is the correct replacement for the following air cleaner: Lennox Pureair PCO-2OC The Lennox Pureair air cleaner is the only air cleaner made that destroys odors and VOC's, and has a MERV rating of MERV 16.

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Lennox Healthy Climate 75X66 Catalyst Insert Assembly
Our Price: $154.00
Retail: $199.99
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FiltersFast 5" Trane BAYFTFR21M Compatible 2-Pack
(FFC21275TRN OKGM)

The FiltersFast 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 FiltersFast air filter also replaces the Trane Perfect Fit BAYFTFR21M filter. This Tr

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Discontinued Product Read Description.
FiltersFast 5" Trane BAYFTFR21M Compatible 2-Pack
Our Price: $100.00
Retail: $104.99
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BestAir R14ALLM Replacement For Kenmore 83125 2-Pack
(KENMORE 83125 1 R)

The Kenmore 83125 Carbon PreFilter 2-Pack is cut-to-fit activated. The Kenmore Carbon PreFilter should be replaced every 2 to 3 months for optimum performance.


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BestAir R14ALLM Replacement For Kenmore 83125 2-Pack
Our Price: $17.99
Retail: $19.99
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Carrier 318501-761 Humidifier Filter Replacement
(Carrier 318501-761 R)

The Carrier 318501-761 Humidifier Filter Replacement is the correct replacement humidifier filter for several humidifier models from Carrier. This evaporator pad measures approximately 9" x 11" (ID) x 12 1/4" (OD) x 3/4" and prevents mineral polluta


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Carrier 318501-761 Humidifier Filter Replacement
As Low As: $10.99
Retail: $14.99
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FiltersFast Replacement For Kenmore 14909 Humidifier Filters 2-Pack
(E2R R)

This is the FiltersFast compatible replacement for the Kenmore 14909 Humidifier Filter.


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FiltersFast Replacement For Kenmore 14909 Humidifier Filters 2-Pack
As Low As: $12.95
Retail: $22.99
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Carrier P110-0007 Paper Water Panel Filter
(Carrier P110-0007 1R)

The Carrier P110-0007 paper water panel filter measures 9-7/16" x 10-1/16" x 1-5/8" (approx.), and is the correct filter for many humidifiers models by BDP, AprilAire, Bryant, Lennox, Autoflo, Healthy Climate, Hamilton, Carrier, Lasko and Totaline.


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Carrier P110-0007 Paper Water Panel Filter
Our Price: $15.99
Retail: $19.99
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Duracraft HEP-5030 Replacement HEPA Filter
(Duracraft HEP-5030 R)

The Duracraft HEP-5030 Replacement HEPA Filter is a replacement air filter for the Duracraft DA-5030 and DA-5000C air cleaner models. This HEPA filter removes 99.7% of airborne particles as small as 0.3 microns, including pollen, mold spores, pet da


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Duracraft HEP-5030 Replacement HEPA Filter
Our Price: $49.99
Retail: $69.99
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American Metal OEMRCP0205 Replacement For GE WB02X10943
(OEMRCP0205)

This Microwave Filter Replacement (OEMRCP0205) made by American Metal Filter Company is a compatible replacement microwave filter primarily for the GE WB02X10943 filter. It is a recirculating charcoal carbon microwave filter for use with non-ducted


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American Metal OEMRCP0205 Replacement For GE WB02X10943
Our Price: $4.99

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FiltersFast Replacement For Honeywell FC100A1003 MERV 8 Comp. Filter-16x20x5
(FFC16205HONM8)

The FiltersFast FFC16205HONM8 compatible air filter replaces the Honeywell FC100A1003 and utilizes an extra deep pleated media for greater filtration capacities.


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FiltersFast Replacement For Honeywell FC100A1003 MERV 8 Comp. Filter-16x20x5
Our Price: $40.95
Retail: $49.95
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Lennox X8349 MERV 10 Filter Maintenance Kit
(X8349)

The Lennox X8349 MERV 10 Filter Maintenance Kit is a filter maintenance kit for the Lennox PCO-12C PureAir Air Purification System. This maintenance kit includes one MERV 10 filter (X6664), one catalyst insert (75X73), and four UV bulbs (X8149). The

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Lennox X8349 MERV 10 Filter Maintenance Kit
Our Price: $196.00
Retail: $225.25
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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.

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Trion Air Bear Supreme 1400 Media Air Cleaner
Our Price: $100.95
Retail: $120.75
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Honeywell FC40R1136 18x24 Return Grille Air Filter 5-Pack
(FC40R1136)

The Honeywell FC40R1136 is the correct replacement for the following air return grille filters: Most air return filter grilles The Honeywell FC40R1136 18x24 Return Grille Air Filter measures 18 inches by 24 inches. This Honeywell FC40R1136 is


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Honeywell FC40R1136 18x24 Return Grille Air Filter
Our Price: $165.90

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Carrier 49BB680044 Humidifier Filter Replacement
(49BB680044)

The Carrier 49BB680044 is the correct replacement for the following humidifiers: Carrier 49BB001/910A Whole House Humidifiers Carrier 49BH/912A-912B Whole House Humidifiers Bryant Whole House Humidifiers


Special Order. Ships in 14 days.
Carrier 49BB680044 Humidifier Filter Replacement
Our Price: $56.99
Retail: $69.99
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Norelco CAF150 Carbon PreFilter 2-Pack
(NORELCO CAF150 1 R)

The Norelco CAF150 Carbon PreFilter 2-Pack is the correct replacement for the following models of Norelco air cleaners: CAS 1050 CAS 1051 CAS 2051 This carbon prefilter measures 7.28" x 2.36" x 9.45". This Norelco prefilter comes with two fi


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Norelco CAF150 Carbon PreFilter 2-Pack
Our Price: $17.99
Retail: $19.99
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Lennox 92X10 40/60 HEPA Filter Replacement
(92X10)

This Lennox Charcoal Carbon Filter 92X10 is designed to capture 99.97% of particulates down to 0.3 micron that pass through it. The Lennox Healthy Climate filter should be replaced every 2-5 years.

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Lennox 92X10 40/60 HEPA Filter Replacement
Our Price: $261.99
Retail: $284.96
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Lennox 94X98 HEPA 20 Filter System Carbon Canister
(94X98)

The Lennox 94X98 HEPA 20 Filter System Carbon Canister is a replacement carbon canister for the Lennox HEPA 20 whole house air cleaner, which is designed to be attached to the ductwork of a home or office.

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Lennox 94X98 HEPA 20 Filter System Carbon Canister
Our Price: $101.86
Retail: $141.00
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Goodman G13MU1625 Replacement Air Filters 3-Pack
(G1-1056)

The Goodman G13MU1625 Replacement Air Filters uses both charged fibers and traditional mechanical filtration principles.

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Goodman G13MU1625 Replacement Air Filters 3-Pack
Our Price: $153.95
Retail: $179.99
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Lennox X2678 HEPA 20 Charcoal Carbon Filter
(X2678)

The Lennox X2678 HEPA 20 Charcoal Carbon Filter is a replacement charcoal carbon filter for the Lennox Healthy Climate HEPA 20 Bypass Filtration Unit. This is an inner filter used in the third stage of filtration for the removal of odors


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Lennox X2678 HEPA 20 Charcoal Carbon Filter
Our Price: $38.00
Retail: $40.28
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Lennox X0582 MERV 11 Air Cleaner Media Filter 5-Pack
(X0582)

The Lennox X0582 MERV 10 Air Cleaner Media Filter is a furnace filter media that contains a MERV 10 air filter. This MERV 10 furnace filter is also known as the Lennox X0582 and measures 16x20x5 inches.


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Lennox X0582 MERV 11 Air Cleaner Media Filter
Our Price: $145.00

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GeneralAire 401-13156 MERV 11 Filter Media
(4051)

The GeneralAire Merv 11 ventilator filter replacement is designed for use in GeneralAire Air Cleaners. This part is often called a GeneralAire 401-13156. A suitable AC24 filter replacement, this Merv 11 replacement filter is expandable.


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GeneralAire 401-13156 MERV 11 Filter Media
Our Price: $52.85
Retail: $69.99
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3M Filtrete OAC200 Replacement Air Cleaner Filter 6-Pack 6-Pack
(OAC200RF)

The 3M Filtrete OAC200 Replacement Air Cleaner Filter is a replacement filter for the 3M Filtrete OAC200 Office Air Cleaner.


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3M Filtrete OAC200 Replacement Air Cleaner Filter 6-Pack
Our Price: $275.94

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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: $41.99
Retail: $49.99
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Hunter 30965 QuietFlo HEPA Purifier Filter 3-Pack
(30965)

The Hunter 30965 QuietFlo HEPA Purifier Filter is an electrostatically-charged filter that captures 99.9% of particles as small as 0.3 microns. This is a true HEPA filter and a genuine OEM Hunter part.


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Hunter 30965 QuietFlo HEPA Purifier Filter
Our Price: $110.97

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Filtrete One Inch Odor Air Filter - 20 x 30 x 1 4-Pack
(Filtrete-Odor-20301)

The Filtrete One Inch Odor Air Filter - 20 x 30 x 1 is constructed with activated carbon to remove common odors from your home, including pet, smoke, cooking, mildew, and cleaning chemicals. In addition to creating a more breathable atmosphere, this


Special Order. Ships in 15 days.
Filtrete One Inch Odor Air Filter - 20 x 30 x 1
Our Price: $86.44

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