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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:


FiltersFast FFC16255HONM13 Replacement for Honeywell FC100A1029 - 16x25x5, MERV13
(FFC16255HONM13)

The FiltersFast MERV13 Replaces Honeywell 16x25x5 FC100A1029 is the compatible version of the genuine Honeywell FC100A Series Residential Air Cleaner Filter.


In Stock! Ships in 4 to 5 business days.
FiltersFast FFC16255HONM13 Replacement for Honeywell FC100A1029 - 16x25x5, MERV13
Our Price: $75.99
Retail: $90.00
You Save 16%!

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Trane Perfect Fit BAYFTFR17P4 FLR05049 Filter-17.5x27x1
(BAYFTFR17P4A)

The Trane Perfect Fit BAYFTFR17P4 FLR05049 Filter - 17.5x27x1 fits several air cleaner models manufactured by Trane. This Trane Perfect Fit filter is 1 inch and pleated for maximum purification of your air.


In stock! Ships in 1 business day.
Trane Perfect Fit BAYFTFR17P4 FLR05049 Filter-17.5x27x1
As Low As: $17.95
Retail: $24.95
You Save 28%!

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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


In Stock! Ships in 23 to 24 business days.
Honeywell 50000293-002 Post Filter for F300 2-Pack
Our Price: $44.08

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3M Filtrete Home Odor AC Filter - 20 x 25 x 1
(Filtrete-Odor-20251)

The 3M Filtrete Home Odor AC Filter - 20 x 25 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 pet,


In stock! Ships in 1 business day.
3M Filtrete Home Odor AC Filter - 20 x 25 x 1
Our Price: $21.61
Retail: $29.99
You Save 28%!

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IcePure ICP-AF003 Replacement For Electrolux EAF1CB
(ICP-AF003)

The IcePure ICP-AF003 is the compatible replacement for the Electrolux EAF1CB refrigerator air filter.


In stock! Ships in 1 business day.
IcePure ICP-AF003 Replacement For Electrolux EAF1CB
Our Price: $6.99
Retail: $9.99
You Save 30%!

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FiltersFast DSG401M11FF Replacement For Space-Gard SG4PR-B, Aprilaire 401 Filter - 2-Pack
(SG4PR-B)

The Space-Gard MERV 11 Compatible Media Filter 2-Pack is a two pack of compatible replacement air filters for the Aprilaire Model 2400 Air Cleaner. Model #401.


In Stock! Ships in 5 to 6 business days.
FiltersFast DSG401M11FF Replacement For Space-Gard SG4PR-B, Aprilaire 401 Filter - 2-Pack
Our Price: $51.98
Retail: $59.99
You Save 13%!

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Top Tech TT-FM-1620 TechPure 16x20x4 MERV 11 Filter
(TT-FM-1620)

The TopTech TechPure TT-FM-1620 16" x 20" x 4" MERV 11 Filter removes many allergens, dust, pollen and other airborne pollutants.


In Stock! Ships in 3 to 4 business days.
Top Tech TT-FM-1620 TechPure 16x20x4 MERV 11 Filter
Our Price: $30.95
Retail: $39.99
You Save 23%!

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FiltersFast Trane BAYFTFR17M2 Air Filter 17.5x27x5
(BAYFTFR17M2)

The FiltersFast Trane BAYFTFR17M2 has nominal dimensions of 17 1/2 inches x 27 inches x 5 inches.


In stock! Ships in 1 business day.
FiltersFast Trane BAYFTFR17M2 Air Filter 17.5x27x5
Our Price: $46.99
Retail: $49.99
You Save 6%!

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TopTech TT-FM-2020 TechPure 20x20x4 MERV 11 Filter
(TT-FM-2020)

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


In Stock! Ships in 5 to 6 business days.
TopTech TT-FM-2020 TechPure 20x20x4 MERV 11 Filter
Our Price: $32.95
Retail: $39.99
You Save 18%!

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Honeywell FC40R1037 12x24 Return Air Grille Filter
(FC40R1037)

The Honeywell FC40R1037 Return Aire Grille Filter is a high efficiency, replacement for return grille applications. Designed to capture airborne particles that circulate through the filter. Nominal Dimension 12x24x4. Genuine Honeywell Part.


In Stock! Ships in 1 to 2 business days.
Honeywell FC40R1037 12x24 Return Air Grille Filter
Our Price: $31.99
Retail: $44.99
You Save 29%!

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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.


In Stock! Ships in 3 to 4 business days.
Lennox X0587 MERV 11 Pleated Media Filter
As Low As: $36.45
Retail: $49.99
You Save 27%!

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BestAir A35WPR Replacement For Honeywell HC26P
(Honeywell HC26 R)

The Honeywell HC26 Humidifier Water Panel Filter is a replacement humidifier water panel filter that fits several Honeywell furnace humidifier models. This evaporator pad measures approximately 10" x 13.25" x 1.5" and features anti-microbial furna


In stock! Ships in 1 business day.
BestAir A35WPR Replacement For Honeywell HC26P
As Low As: $11.45
Retail: $14.99
You Save 24%!

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Trion Air Bear 259112-101 Cub Filter 16x25x3 MERV 11
(259112-101)

The 259112-101 is the correct filter replacement for all air cleaning sytems requiring a 16" x 25" x 3" air filter. The Trion Air Bear Cub Filter is a genuine Air Bear filter.


In stock! Ships in 1 business day.
Trion Air Bear 259112-101 Cub Filter 16x25x3 MERV 11
Our Price: $26.99

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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 4 to 5 business days.
Lennox X8310 MERV 11 Expandable Filter Replacement
Our Price: $33.95
Retail: $39.50
You Save 14%!

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FiltersFast 711D R 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.


In Stock! Ships in 1 to 2 business days.
FiltersFast 711D R Replacement For Bionaire 711D Air Cleaner Filter
Our Price: $11.95
Retail: $14.99
You Save 20%!

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Lennox X1152 MERV 11 Pleated Media Furnace Filter MF1-20
(X1152)

The Lennox X1152 MERV 10 Pleated Media Furnace Filter is the replacement filter cartridge for several Lennox, Trion Air Bear, other air cleaner systems requiring 20x25x5 furnace filters.


In Stock! Ships in 1 to 2 business days.
Lennox X1152 MERV 11 Pleated Media Furnace Filter MF1-20
As Low As: $27.95
Retail: $33.75
You Save 17%!

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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: $35.99
Retail: $49.99
You Save 28%!

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FiltersFast FFC20255HONM8 Replacement for Honeywell 20x25x5 FC100A1037 2-Pack
(FFC20255HONM8)

The FilterFast Brand Honeywell 20x25x5 FC100A1037 2-Pack is the compatible version of the OEM Honeywell 20x25x5 Air Filter FC100A1037.


In Stock! Ships in 2 to 3 business days.
FiltersFast FFC20255HONM8 Replacement for Honeywell 20x25x5 FC100A1037 2-Pack
Our Price: $40.99
Retail: $60.00
You Save 32%!

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FiltersFast FFC24265TRN Replacement for Trane PerfectFit BAYFTFR24M 24.5x27x5 2-Pack
(FFC24265TRN)

These FiltersFast Brand Trane Perfect Fit BAYFTFR24M 24.5x27x5 MERV 11 Furnace Filters are compatible upgrades over Trane Perfect Fit Air Filters. These FiltersFast Air Filters specifically replace Trane part number BAYFTFR24M, which is a 24.5x27x5


In Stock! Ships in 4 to 5 business days.
FiltersFast FFC24265TRN Replacement for Trane PerfectFit BAYFTFR24M 24.5x27x5 2-Pack
Our Price: $70.95
Retail: $111.00
You Save 36%!

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Lennox X8309 MERV 10 Expandable Filter Replacement
(X8309)

The Lennox X8309 MERV 10 Expandable Filter Replacement is a replacement expandable filter for the Lennox 16x25x5 model air cleaner. This pleated air filter measures approximately 16x25x5 and boasts a MERV 10 rating.


In Stock! Ships in 2 to 3 business days.
Lennox X8309 MERV 10 Expandable Filter Replacement
Our Price: $33.95
Retail: $39.50
You Save 14%!

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FiltersFast FFC16255TAB Trion Compatible 16x25x5, 2-Pack
(FFC16255TAB)

The FiltersFast Compatible 16x25x5 MERV 11 Air Filter can be used as an upgrade for Trion Air Bear part number 255649-105. Upgrade your Trion Air Bear Filter today for just a few extra dollars!


In Stock! Ships in 5 to 6 business days.
FiltersFast FFC16255TAB Trion Compatible 16x25x5, 2-Pack
Our Price: $56.00
Retail: $83.00
You Save 33%!

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FiltersFast FFC26215TRNM13 Replacement for Trane BAYFTAH26M, 21x26x5 Perfect Fit - MERV13, 2-Pack
(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 4 to 5 business days.
FiltersFast FFC26215TRNM13 Replacement for Trane BAYFTAH26M, 21x26x5 Perfect Fit - MERV13, 2-Pack
Our Price: $111.00
Retail: $140.00
You Save 21%!

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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


In stock! Ships in 1 business day.
Honeywell 203371 Air Cleaner Pre-Filter 2-PACK
Our Price: $57.59
Retail: $59.99
You Save 4%!

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FiltersFast ROHAPF60M Replacement For Holmes HAPF60 Pre-Filter 2-Pack 2-Pack
(HAPF60)

The Holmes HAPF60 Carbon Pre-Filter 4-Pack fits Holmes HAP615, HAP625, HAP650, HAP675, and others. In an average household 1 Pre-filter will last 3 months--order your year supply today!


In Stock! Ships in 4 to 5 business days.
FiltersFast ROHAPF60M Replacement For Holmes HAPF60 Pre-Filter 2-Pack
Our Price: $19.90

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Honeywell HFC40R1011 Return Grille Filter 20"x25"
(HFC40R1011)

The Honeywell HFC40R1011 20"x25" Return Air Grille Filter is a high efficiency replacement air filter for return grille air filtration applications. Honeywell replacement filters efficiently capture harmful airborne particles such as dust, pet dande


In Stock! Ships in 1 to 2 business days.
Honeywell HFC40R1011 Return Grille Filter 20"x25"
Our Price: $35.99
Retail: $49.99
You Save 28%!

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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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