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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.


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Air Filters product list


TopTech DTT-FM-1625 16x25x4 MERV 11 Filter
(DTT-FM-1625)

The TopTech DTT-FM-1625 16x25x4 MERV 11 Filter removes many allergens, dust, pollen and other airborne pollutants.


In Stock! Ships in 2 to 3 business days.
TopTech DTT-FM-1625 16x25x4 MERV 11 Filter
Our Price: $33.99
Retail: $45.99
You Save 26%!

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Trion Air Bear Media AC Filter 20x20x5 4-Pack
(255649-103 4pack)

The Trion Air Bear Media AC Filter 20x20x5 part number 255649-103 is a genuine Trion Air Bear pleated media A/C filter. The 255649103 can be used in Trion 20" x 20" Models including model number 455604-019. Replaces 229990-103 and 248713-103.


Out of stock
Trion Air Bear Media AC Filter 20x20x5 4-Pack
Our Price: $79.00
Retail: $100.00
You Save 21%!

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Lennox X0587 MERV 11 Pleated Media Filter
(X0587)

This Lennox X0587 MERV 10 Pleated Media Filter is a MERV 10 replacement furnace filter. This pleated furnace filter offers quality filtration of impurities and pollutants in the air.


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Lennox X0587 MERV 11 Pleated Media Filter
Our Price: $42.95
Retail: $49.99
You Save 14%!

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Honeywell 50000293-002 Post Filter for F300 2-Pack 2-Pack
(50000293-002)

The Honeywell 50000293-002 is the correct replacement for the following air cleaners: Honeywell F300 Series Honeywell F50F Series Honeywell F58F Series The Honeywell 50000293-002 Post Filter for F50F & F300 measures 16 inches by 12 1/2 inche


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Honeywell 50000293-002 Post Filter for F300 2-Pack
Our Price: $44.07

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FiltersFast 4-inch MERV 8 Air Filters 3-Pack
(FFM8PLEAT 4)

The Filters Fast 4-inch MERV 8 4"Air Filters 3-pack is compatible with: Aprilaire Space-Gard Trion Air Bear Honeywell and other top name brand air conditioning filters. Usable in residential, commercial, and industrial applications, the


In Stock! Ships in 3 to 4 business days.
FiltersFast 4-inch MERV 8 Air Filters 3-Pack
Our Price: $43.95

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Honeywell 38002 Universal Replacement Pre-Filter
(38002)

The Honeywell Universal Replacement Pre-Filter 38002 can be used in place of pre-filters 32002, 33002, 34002, and 35002. This pre-filter fits all Round Honeywell HEPA Air Cleaner Models. Genuine Honeywell part.


In stock! Ships in 1 business day.
Honeywell 38002 Universal Replacement Pre-Filter
Our Price: $14.95
Retail: $15.95
You Save 6%!

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Honeywell FC40R1060 16x25 Return Air Grille Filter
(FC40R1060)

Honeywell FC40R1060 16x25 Return Air Grille AC Filter is a high efficiency, replacement air filter for return grille applications. Designed to capture airborne particles that circulate through the filter. Nominal Dimension 16x25x4.


In Stock! Ships in 1 to 2 business days.
Honeywell FC40R1060 16x25 Return Air Grille Filter
Our Price: $44.00
Retail: $46.00
You Save 4%!

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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: $120.95
Retail: $229.00
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Honeywell FC200E1029 MERV 13 Air Filter - 16x25x5
(FC200E1029)

The Honeywell FC200E1029 MERV 13 Air Filter - 16x25x5 is a replacement air filter for the Honeywell 16x25 F100 and F200 media air cleaner models. This Honeywell air filter features a MERV 13 rating that helps it remove over 97% of airborne contamina


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Honeywell FC200E1029 MERV 13 Air Filter - 16x25x5
Our Price: $41.39
Retail: $44.73
You Save 7%!

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TopTech DTT-FM-2020 20x20x4 MERV 11 Filter
(DTT-FM-2020)

The TopTech DTT-FM-2020 20x20x4 MERV 11 Filter removes many allergens, dust, pollen and other airborne pollutants.


In Stock! Ships in 1 to 2 business days.
TopTech DTT-FM-2020 20x20x4 MERV 11 Filter
Our Price: $35.25
Retail: $39.99
You Save 12%!

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Lennox X8311 MERV 11 Expandable Filter Replacement
(X8311)

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


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Lennox X8311 MERV 11 Expandable Filter Replacement
Our Price: $34.39
Retail: $38.71
You Save 11%!

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Honeywell 203371 Air Cleaner Pre-Filter 2-PACK
(203371)

The Honeywell 203371 is the correct replacement for the following air cleaners: Honeywell F300E1019 Honeywell F58A1001 Honeywell F58E1002 Honeywell F50F1073 Honeywell F58F1018 Honeywell F50E1158 Honeywell F50E1174 Honeywell F50E1281 Honey


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Honeywell 203371 Air Cleaner Pre-Filter 2-PACK
Our Price: $57.59
Retail: $59.99
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Honeywell FC40R1144 Return Air Filter - 20x24
(FC40R1144)

The Honeywell FC40R1144 Return Air Filter - 20x24 is a replacement air filter that mounts in most return filter grilles. The Honeywell return air grille filter features four inches of depth, which provides a higher efficiency than standard one inch


In stock! Ships in 1 business day.
Honeywell FC40R1144 Return Air Filter - 20x24
Our Price: $34.95
Retail: $39.99
You Save 13%!

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Aprilaire 1413 Air Filter Performance Upgrade Kit
(Aprilaire 1413)

The Aprilaire 1413 is an Aprilaire Upgrade Kit that allows owners of Spacegard 2400 and Aprilaire 2400 air cleaners to use the MERV 13 Aprilaire 413 Filter instead of their MERV 10 Aprilaire 401 Filter. This improves air cleaning performance by 65 p

Free shipping within the continental United States!

In stock! Ships in 1 business day.
Aprilaire 1413 Air Filter Performance Upgrade Kit
Our Price: $55.95
Retail: $64.99
You Save 14%!

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Lennox X0581 MERV 11 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.


In stock! Ships in 1 business day.
Lennox X0581 MERV 11 Pleated Furnace Filter Media
Our Price: $27.10
Retail: $29.99
You Save 10%!

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Carrier EXPXXFIL0024 EZ-FLEX Air Purifier Filter
(EXPXXFIL0024)

The Carrier EXPXXFIL0024 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 EXPXXFIL0024 EZ-FLEX Air Purifier Filter
Our Price: $42.95
Retail: $99.99
You Save 57%!

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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 35 to 36 business days.
3M Filtrete Dust & Pollen Furnace Filter 6-Pack LB
Our Price: $59.25
Retail: $60.11
You Save 1%!

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Lennox X0444 MERV 11 Pleated Furnace Filter Media
(X0444)

The Lennox X0444 MERV 10 Pleated Furnace Filter Media is a filter for your HVAC system. This furnace filter media is known as the x0444 and uses a MERV 10 air filter.The MERV 10 rating will provide your home with significant air cleaning capability


In stock! Ships in 1 business day.
Lennox X0444 MERV 11 Pleated Furnace Filter Media
Our Price: $30.95
Retail: $39.99
You Save 23%!

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Lennox X8310 MERV 11 Expandable Filter Replacement
(X8310)

The Lennox x8310 expandable MERV 11 filter is for use in your homes filter system. Also known as the healthy climate furnace filter, the X8310 measures 20x25x5 inches. This furnace filter media will protect your home from particles such as du


In stock! Ships in 1 business day.
Lennox X8310 MERV 11 Expandable Filter Replacement
Our Price: $31.95
Retail: $39.50
You Save 19%!

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Trion Air Bear Cub Filter 16x25x5 MERV 11
(259112-105)

This Trion Air Bear 259112-105 Filter is the correct replacement for the following air cleaning system: Trion Air Bear Duct Mount Media Air Cleaner


In stock! Ships in 1 business day.
Trion Air Bear Cub Filter 16x25x5 MERV 11
Our Price: $30.95

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Holmes HWF75 Humidifier Filter - HM1700, HM1280
(HWF75)

Holmes HWF75 Humidifier Filter features Microban technology and is designed for use with Humidifier Models: HM3500, HM3600, HM3640, HM3641, HM3650, HM3655, WWH3300, and WWHM3600.


In stock! Ships in 1 business day.
Holmes HWF75 Humidifier Filter - HM1700, HM1280
Our Price: $20.99

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GeneralAire 6FM2025 MERV 11 Replacement For GeneralAire 5FM2025
(4501)

The General Aire 5FM2025 MERV 10 Filter Media Cartridge measures 20"x25"x5", and is the correct replacement part for General Air MAC 2000 and MACL Air Cleaner Systems; and TRION AirBear Supreme 2000 Air Cleaner Systems.


In stock! Ships in 1 business day.
GeneralAire 6FM2025 MERV 11 Replacement For GeneralAire 5FM2025
Our Price: $39.95
Retail: $40.95
You Save 2%!

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FiltersFast Trane 21x26x5 Perfect Fit BAYFTAH26M M13 x2
(FFC26215TRNM13)

If you are looking for an economical compatible version of the genuine Trane/American Standard BAYFTAH26M Perfect Fit Air Filter, try this FiltersFast Trane 21x26x5 Perfect Fit BAYFTAH26M M13 with a MERV 13 energy efficiency rating.

Free shipping within the continental United States!

In Stock! Ships in 2 to 3 business days.
FiltersFast Trane 21x26x5 Perfect Fit BAYFTAH26M M13 x2
Our Price: $111.00
Retail: $140.00
You Save 21%!

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Holmes HWF64 Humidifier Filter
(HWF64)

The Holmes HWF64 Humidifier Filter is designed to maintain optimal peformance of your Holmes Humidifier. Fits models HM1645, HM1730, HM1745, HM1750, and HM2200.


In stock! Ships in 1 business day.
Holmes HWF64 Humidifier Filter
As Low As: $15.99
Retail: $25.95
You Save 38%!

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Honeywell FC40R1078 24x24 Return Air Grille Filter
(FC40R1078)

The Honeywell FC40R1078 Return Air Grille Filter is a high efficiency, replacement air filter for return grille applications. Designed to capture airborne particles that circulate through the filter. Nominal Dimension 24x24x4.


In stock! Ships in 1 business day.
Honeywell FC40R1078 24x24 Return Air Grille Filter
Our Price: $43.50
Retail: $55.00
You Save 21%!

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Filters Fast - Air Filters

" I just received my filters - thank you for the excellent work that you guys do! I'm a very happy customer. " - Mike, San Marcos, TX
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