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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.


Air Filters full product list:


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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Aprilaire 1200 Commercial Humidifier Filter Pad Water Panel
(Aprilaire 1200)

This is an Aprilaire 1200 Humidifier Filter Pad Water Panel for various Aprilaire commercial humidifiers including the Aprilaire 1120 Humidifier, Aprilaire 1130 humidifier, and the Aprilaire 1140 humidifer. The Aprilaire water panel evaporator is th


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Aprilaire 1200 Commercial Humidifier Filter Pad Water Panel
Our Price: $62.95
Retail: $90.60
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Lennox Y6608 PCO3-20-16 Healthy Climate PureAir Annual Kit
(Y6608)

Lennox Y6608 PCO3-20-16 Healthy Climate PureAir Annual Maintenance Kit.

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Lennox Y6608 PCO3-20-16 Healthy Climate PureAir Annual Kit
Our Price: $148.95
Retail: $178.54
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Trion Air Bear Right Angle Media Air Cleaner
(447380-010)

The Trion Air Bear Right Angle Media Air Cleaner, part number 447380-002, provides a clean and controlled indoor air environment in your home. Ideal for installations that normally require a 90 degree duct adaptor.

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Trion Air Bear Right Angle Media Air Cleaner
Our Price: $123.83
Retail: $199.99
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Aprilaire 4897 Conversion Frame for Model 5000
(4897)

The Aprilaire 4897 Conversion Frame upgrades your Honeywell, Trion, Carrier, General, or Lennox brand media style air cleaner filters to use Aprilaire replacements.


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Aprilaire 4897 Conversion Frame for Model 5000
Our Price: $7.95
Retail: $19.99
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FiltersFast Replacement for Honeywell FC100A1011 - 20x20x5 2-Pack
(FFC20205HONM8)

FiltersFast Brand Honeywell 20x20x5 FC100A1011 2-Pack Air Filter is an economical compatible version of the OEM Honeywell FC100A1011 20"x20" Media AC Filter. To save money, this air filter replacement comes in a 2pk value set.


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FiltersFast Replacement for Honeywell FC100A1011 - 20x20x5 2-Pack
Our Price: $44.90
Retail: $50.00
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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


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Honeywell FC35A1035 Furnace/ AC Air Filter 16x20x5
As Low As: $30.99
Retail: $49.99
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FiltersFast MERV 7 Pleated Filters 6 pk
(FFM7Pleat)

With an initial pressure drop of around .17, these FiltersFast 2" MERV 7 Pleated Panel Filters are comparable to or an upgrade over such other pleat filters as the American Air or AmAir PerfectPleat, the Airguard Xtreme Pleated Panel Filters ...


This item has been discontinued. Please review the product description for more information.
FiltersFast MERV 7 Pleated Filters 6 pk
Our Price: $28.95
Retail: $39.00
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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.


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GeneralAire HMK500 Filter Replacement Kit 2-Pack
Our Price: $83.98

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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.


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Lennox 92X09 HEPA 40/60 Charcoal Carbon Filter
Our Price: $45.95
Retail: $48.25
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FiltersFast Brand Honeywell 20x20x5 FC100A1011 2-Pack
(FFC20205HONM13)

The FiltersFast Brand Honeywell 20x20x5 FC100A1011 2-Pack is a compatible version of the genuine Honeywell FC100A1011 20"x20" Media AC Filter. This filter replacement is also known as part number FFC20205HONM13.


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FiltersFast Brand Honeywell 20x20x5 FC100A1011 2-Pack
Our Price: $80.99
Retail: $90.00
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Hunter 30936 QuietFlo HEPA Purifier Filter
(30936)

The Hunter 30936 QuietFlo HEPA Purifier Filter is an electrostatically-charged filter that captures 99.97% of particles as small as 0.3 microns.


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Hunter 30936 QuietFlo HEPA Purifier Filter
Our Price: $58.95
Retail: $299.97
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Lennox X8348 MERV 10 Filter Maintenance Kit
(X8348)

The Lennox X8348 MERV 10 Filter Maintenance Kit is a maintenance kit for the Lennox PCO-20C PureAir Air Purification System. This PureAir maintenance kit includes: one MERV 10 filter, also known as part number X6667; one catalyst insert, also known

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Lennox X8348 MERV 10 Filter Maintenance Kit
Our Price: $229.00
Retail: $354.95
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Honeywell Trane Perfect Fit 26x21x5 BAYFTAH26M 3-Pack
(HTRN2621T1)

These 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 filters

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Honeywell Trane Perfect Fit 26x21x5 BAYFTAH26M 3-Pack
Our Price: $141.50
Retail: $150.00
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Lennox WB2-12 Humidifier Paper Water Panel Filter
(Lennox WB2-12 1R)

The Lennox WB2-12 Humidifier Paper Water Panel Filter is the correct compatible replacement for the following model of humidifier: Lennox WB2-12 This Lennox humidifier water panel has approximate dimensions of 9 1/2" x 10" x 1 1/2". This paper


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Lennox WB2-12 Humidifier Paper Water Panel Filter
Our Price: $15.99
Retail: $19.99
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Aprilaire 4510 Replacement Air Filter-1700, 1710A
(4510)

The Aprilaire 4510 is the correct replacement for the following dehumidifier: Aprilaire 1700 Dehumidifier


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Aprilaire 4510 Replacement Air Filter-1700, 1710A
Our Price: $32.95
Retail: $39.99
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FiltersFast A10WPR Replacement For Carrier P1101045
(P110-1045)

The Carrier P110-1045 Paper Water Panel Filter measures 9-1/2" x 9-3/4" x 1-1/2" (approx.), and is the correct replacement filter for many humidifiers made by AprilAire, Bryant, Carrier, Chippewa, Hamilton, Honeywell, Lasko, Lennox and Totaline.


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FiltersFast A10WPR Replacement For Carrier P1101045
Our Price: $15.99
Retail: $19.99
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BestAir R14ALLM Replacement For Kenmore 83157 2-Pack
(KENMORE 83157 1 R)

The Kenmore 83157 Carbon PreFilter 2-Pack is the correct replacement for: several Kenmore air cleaner models This carbon prefilter is a cut to fit sheet that measures 15 3/4" x 48". This Kenmore prefilter removes large particles and common hou


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BestAir R14ALLM Replacement For Kenmore 83157 2-Pack
Our Price: $17.99
Retail: $19.99
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FilterFast Trane 21.5x21x5 Perfect Fit BAYFTAH21M Merv 13 2 Pack
(FFC215215TRNM13)

The FilterFast Brand Trane 21.5x21x5 Perfect Fit Filter BAYFTAH21M, FLR06072, BAYFTAH21M2 is a compatible economical alternative for the genuine Trane 21.5x21x5 Perfect Fit Filter that comes in a 2-pack value set.

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FilterFast Trane 21.5x21x5 Perfect Fit BAYFTAH21M Merv 13 2 Pack
Our Price: $69.95
Retail: $140.00
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Honeywell HC-24 Humidifier Filter Replacement
(Honeywell HC-24 R)

The Honeywell HC-24 Humidifier Filter Replacement is a J replacement humidifier filter for the Holmes Tabletop Cool Mist Humidifier models. This evaporator pad is antimicrobially treated for the removal of pollutants from water and prevents the grow


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Honeywell HC-24 Humidifier Filter Replacement
As Low As: $15.99
Retail: $25.95
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FiltersFast Brand Trane 21x23x5 Perfect Fit BAYFTAH23M
(FFC21235TRNM13)

The FiltersFast Brand Trane 21x23x5 Perfect Fit BAYFTAH23M is a compatible version of the genuine Trane Perfect fit 21x23x5 Air Filter.

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FiltersFast Brand Trane 21x23x5 Perfect Fit BAYFTAH23M
Our Price: $90.95
Retail: $140.00
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FiltersFast 711D Replacement For Bionaire 711D Air Cleaner Filter
(711D R)

The Bionaire 711D Replacement Air Cleaner Filter is a replacement air filter for several Bionaire model air cleaners, including the F701 and 100 100. The Bionaire 711D features a dual filter cartridge.


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FiltersFast 711D Replacement For Bionaire 711D Air Cleaner Filter
Our Price: $11.95
Retail: $14.99
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FiltersFast ROHAPF60M Replacement For Bionaire HAPF60 R Filter 2-Pack 2-Pack
(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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FiltersFast ROHAPF60M Replacement For Bionaire HAPF60 R Filter 2-Pack
Our Price: $19.90

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Lennox Y6616 PCO3-14-16 PureAir Maintenance Kit
(DLXY6616)

The Lennox Y6616 PCO3-14-16 Air Filter Maintenance Kit includes the following:

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Lennox Y6616 PCO3-14-16 PureAir Maintenance Kit
Our Price: $167.54
Retail: $178.54
You Save 6%!

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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


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Trane Perfect Fit BAYFTFR21P4A Filter - 21x27x1
Our Price: $21.90

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