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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.


Air Filters full product list:


Filtrete Odor Reduction Air Filter - 14 x 24 x 1
(Filtrete-Odor-14241)

The Filtrete Odor Reduction Air Filter - 14 x 24 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, thi


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Filtrete Odor Reduction Air Filter - 14 x 24 x 1
Our Price: $21.66
Retail: $179.99
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GE WB02X10956 Compatible Microwave Filter
(OEMRCP0303)

This Microwave Filter Replacement (OEMRCP0303) made by American Metal Filter Company is a compatible replacement microwave filter primarily for the GE WB02X10956 filter. It is a recirculating charcoal carbon microwave filter for use with non-ducted


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GE WB02X10956 Compatible Microwave Filter
Our Price: $8.99
Retail: $10.99
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Lennox X0581 MERV 10 Pleated Furnace Filter Media
(X0581)

This Lennox X0581 MERV 10 Pleated Furnace Filter Media provides high efficiency filtration. This Merv 10 furnace filter requires no assembly or combs.


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Lennox X0581 MERV 10 Pleated Furnace Filter Media
Our Price: $34.95
Retail: $41.99
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3M Filtrete Home Odor Furnace Filter - 14 x 30 x 1
(Filtrete-Odor-14301)

The 3M Filtrete Home Odor Furnace Filter - 14 x 30 x 1 features activated carbon technology along with electrostatically charged fibers to provide high performance air filtration in your home. This Filtrete air filter can remove common odors such as


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3M Filtrete Home Odor Furnace Filter - 14 x 30 x 1
Our Price: $21.61
Retail: $29.99
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Hunter 30917 HEPAtech Purifier Filter
(30917)

The Hunter 30917 HEPAtech Purifier Filter is an electrostatically-charged filter that captures 99.9% of particles as small as 0.3 microns.


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Hunter 30917 HEPAtech Purifier Filter
Our Price: $16.99
Retail: $24.99
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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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Lennox Genuine 92X10 HEPA Filter Replacement for HEPA-40, HEPA-60
(92X10)

This Lennox Genuine 92X10 HEPA Filter Replacement for HEPA-40, HEPA-60 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 Genuine 92X10 HEPA Filter Replacement for HEPA-40, HEPA-60
Our Price: $217.95
Retail: $284.99
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FiltersFast 1" Air Filters MERV 13 Replacement for Nordic Pure 1" MERV 12 6-Pack
(FFM13 6pk ND)

Make the air you breathe inside your home the best it can be with this affordable and convenient 6-pack of 1" MERV 13 air filters from FiltersFast.


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FiltersFast 1" Air Filters MERV 13 Replacement for Nordic Pure  1" MERV 12 6-Pack
Our Price: $59.95
Retail: $70.99
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BioStrike CFF Ceiling Fan Air Filter - 93880
(BioStrike CFF)

The BioStrike Ceiling Fan Air Filter (BioStrike CFF) can be used with most ceiling fans to reduce dust, dirt, hair, pollen, pet dander, mold, and other airborne allergens. It attaches to the ceiling fan blade(s) to provide air filtration every time


Special Order. Ships in 33 days.
BioStrike CFF Ceiling Fan Air Filter - 93880
Our Price: $11.49
Retail: $14.99
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GeneralAire GA19 Humidifier Vapor Pad Replacement
(7919)

The GeneralAire GA19 Humidifier Vapor Pad Replacement is a replacement vapor pad for the GeneralAire Elite Models 900 and 1000. Air passes through the GA19 vapor pad where moisture is absorbed into the heating system after which the home is humidifi


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GeneralAire GA19 Humidifier Vapor Pad Replacement
As Low As: $10.99
Retail: $17.99
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FiltersFast A10PR R Replacement for Trane BAYPAD01A1010A
(BAYPAD01A1010A 1 R)

The FiltersFast A10PR R is the correct replacement for the Trane BAYPAD01A1010A 1 R and for the following humidifier models:


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FiltersFast A10PR R Replacement for Trane BAYPAD01A1010A
As Low As: $6.99
Retail: $12.99
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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.


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Hunter 30901 Carbon Purifier Pre-Filter
As Low As: $20.50
Retail: $27.99
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FiltersFast FFC20205HONM13 Replacement for Honeywell FC100A1011, 20x20x5 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 FFC20205HONM13 Replacement for Honeywell FC100A1011, 20x20x5 2-Pack
Our Price: $80.99
Retail: $95.99
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FiltersFast FFC21235TRNM13 Replacement for Trane BAYFTAH23M, 21x23x5 Perfect Fit
(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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In Stock! Ships in 2 to 3 business days.
FiltersFast FFC21235TRNM13 Replacement for Trane BAYFTAH23M, 21x23x5 Perfect Fit
Our Price: $90.95
Retail: $139.99
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Aprilaire 12 Replacement Water Panel
(Aprilaire 12)

This is an Aprilaire 112 & 445 Humidifier Water Panel Evaporator for the Aprilaire 440 Humidifier, Aprilaire 445 Humidifier, Aprilaire 445A Humidifier, Aprilaire 448 Humidifier, Aprilaire 112 Humidifier, and Aprilaire 224 Humidifier. The Aprilaire w


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Aprilaire 12 Replacement Water Panel
As Low As: $10.75
Retail: $23.99
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GeneralAire 3FM1625 MERV 8 Filter Media Cartridge
(4521)

The General Air 3FM1625 MERV8 Filter Cartridge measures 16"x25"x3", and is the correct filter for General Aire MAC1200 Series Air Cleaners. This General Aire filter will dramatically reduce airborne contaminates to provide much healthier indoor air.


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GeneralAire 3FM1625 MERV 8 Filter Media Cartridge
Our Price: $21.99
Retail: $29.99
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GeneralAire 6FM2020 MERV 11 Replacement For GeneralAire 5FM2020
(4531)

The General Aire 5FM2020 MERV10 Media Cartridge measures 20"x20"x5", and is used on GeneralAire MAC 2020 Series and TRION AirBear Supreme 20x20 Systems. This General Aire filter will reduce airborne particulates to provide healthier indoor air.


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GeneralAire 6FM2020 MERV 11 Replacement For GeneralAire 5FM2020
Our Price: $35.95
Retail: $49.99
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FiltersFast 1" Air Filters MERV 8 Replacement for Nordic Pure MERV 8 6-Pack
(FFM8 6pk ND)

Take advantage of the savings and breathe better with the FiltersFast 1" Air Filters MERV 8 With Pleats 6-Pack.


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FiltersFast 1" Air Filters MERV 8 Replacement for Nordic Pure MERV 8 6-Pack
Our Price: $43.95
Retail: $51.99
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Lennox X8345 PureAir PCO-20C MERV 16 Upgrade Kit
(X8345)

The Lennox X8345 PureAir PCO-20C MERV 16 Upgrade Kit, part number x8345 is meant for your Lennox PureAir PCO-20C air filtration unit. This MERV 16 filter measures 21" x 26" x 4" inches.

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Lennox X8345 PureAir PCO-20C MERV 16 Upgrade Kit
Our Price: $279.95
Retail: $343.99
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Filtrete Home Odor Furnace Air Filter- 20 x 20 x 1
(Filtrete-Odor-20201)

The Filtrete Home Odor Furnace Air Filter- 20 x 20 x 1 features activated carbon technology along with electrostatically charged fibers to provide high performance air filtration in your home. This Filtrete air filter can remove common odors such as


Out of stock
Filtrete Home Odor Furnace Air Filter- 20 x 20 x 1
Our Price: $21.61
Retail: $29.99
You Save 28%!

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GeneralAire GA10 Humidifier Vapor Pad
(7900)

The GeneralAire GA10 Humidifier Vapor Pad is a replacement vapor pad for the GeneralAire 570 Elite Flow Through Humidifer, as well as several humidifier models from Honeywell, AprilAire, and Source1. The hot air from the humidifier's furnace is firs


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GeneralAire GA10 Humidifier Vapor Pad
Our Price: $13.95
Retail: $19.99
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FiltersFast RHF0525 Aluminum Range Hood Filter
(FFMH-006)

The FiltersFast FFMH-006 Oven Hood Range Filter is the compatible replacement filter for the American Metal Filter RHF0525 and Whirlpool 6802A.


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FiltersFast RHF0525 Aluminum Range Hood Filter
As Low As: $7.95
Retail: $14.99
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GeneralAire 13415 MERV 11 Filter Media for AC4
(GA 4401)

The GeneralAire air cleaner filter replacement is manufactured for your AC4 furnace air cleaner. This air cleaner filter cartridge features a MERV 11 rating that will capture particulates down to 3 microns in size. This genuine GeneralAire product i


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GeneralAire 13415 MERV 11 Filter Media for AC4
Our Price: $31.99
Retail: $37.99
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Honeywell 50000293-001 Post Air Filter 2-Pack 2-Pack
(50000293-001)

The Honeywell 50000293-001 is a post filter that fits the following electronic air cleaner models: Honeywell F50F Honeywell F300E The Honeywell 50000293-001 Post Air Filter - 16x10 improves the performance and efficiency of the air cleaner.


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Honeywell 50000293-001 Post Air Filter 2-Pack
Our Price: $43.90

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IcePure Replacement for GE Cafe Series Odor Filter
(AF005)

The IcePure AF005 Replacement for the GE Cafe Series Odor Filter uses a powerful charcoal filter to help reduce odor inside your refrigerator.


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IcePure Replacement for GE Cafe Series Odor Filter
Our Price: $17.75
Retail: $23.99
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Filters Fast - Air Filters

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