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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.

Routine maintenance is a critical part of caring for your home. One area that should not be overlooked is replacing your home’s furnace filters on a regular basis following the manufacturers recommended guidelines. By doing this, you will help prolong the life of your system, as well as help eliminate indoor air contaminates.

Air filters help rid your home of a variety of air pollutants including smog, smoke, pollen, bacteria, pet dander, mold spores, dust, dust mites, debris and virus carrying particles. The MERV rating on furnace filters can help guide you in this area. The higher the rating, the more efficient the air filter will be at eliminating indoor contaminates.

Filtrete, Trion, 3M and Honeywell all manufacture high quality filters in a variety of sizes to meet all of your air filtration needs.


Furnace Filters full product list:


Honeywell FC200E1003 MERV 13 Media Filter-16x20x5
(FC200E1003)

The Honeywell FC200E1003 Media Filter fits all Honeywell 16x20 Air Cleaners including the F200E Enviracaire Elite Series and others. Genuine Honeywell Part.


In Stock! Ships in 8 to 9 business days.
Honeywell FC200E1003 MERV 13 Media Filter-16x20x5
As Low As: $41.49
Retail: $79.99
You Save 48%!

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FC40R1830 18x30 Honeywell Return Grille AC Filter 5-Pack
(FC40R1830)

The Honeywell FC40R1830 18x30 Return Air Grille Filter is a high efficiency, replacement air filter for return grille applications. Honeywell replacement furnace filters capture airborne particles that circulate through the furnace filter.


In Stock! Ships in 1 to 2 business days.
FC40R1830 18x30 Honeywell Return Grille AC Filter
Our Price: $217.50

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Trane Perfect Fit BAYFTFR24P4A Filter 24.5x28.5x1
(BAYFTFR24P4A)

The Trane Perfect Fit BAYFTFR24P4A Filter - 24.5×28.5x1 fits several air cleaner models manufactured by Trane. Featuring pleats and a depth of 1 inch, this Trane Perfect Fit filter measures approximately 24.5×28.5x1 and helps improve your overall i


Special Order. Ships in 17 days.
Trane Perfect Fit BAYFTFR24P4A Filter 24.5x28.5x1
Our Price: $17.27
Retail: $20.99
You Save 18%!

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Trane Perfect Fit BAYFTFR24M2A Filter - 24.5x27x5 2-Pack
(BAYFTFR24M2A)

The Trane Perfect Fit BAYFTFR24M2A Filter - 24.5x27x5 fits the TFM245B0FR0 Perfect Fit High Efficiency Air Cleaner and easily slides in for quick use. This Trane Perfect Fit filter measures approximately 24.5" x 27" x 5" and has a MERV 8 rating for


Special Order. Ships in 12 days.
Trane Perfect Fit BAYFTFR24M2A Filter - 24.5x27x5
Our Price: $103.46

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Honeywell TRN2121T1 Replacement for Trane BAYFTAH21M, 21.5x21x5 Perfect Fit - 3-Pack
(TRN2121T1)

These three 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 f

Free shipping within the continental United States!

In Stock! Ships in 8 to 9 business days.
Honeywell TRN2121T1 Replacement for Trane BAYFTAH21M, 21.5x21x5 Perfect Fit - 3-Pack
Our Price: $149.00
Retail: $175.99
You Save 15%!

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FiltersFast FFC16265WRMM13 Replacement for White Rodgers F825-0548, 16x26x5 - 2-Pack
(FFC16265WRMM13)

The FiltersFast Brand White Rodgers 16x26x5 F825-0548 2Pack is a compatible economical alternative to the genuine 16x26x5 air furnace filter.


In Stock! Ships in 3 to 4 business days.
FiltersFast FFC16265WRMM13 Replacement for White Rodgers F825-0548, 16x26x5 - 2-Pack
Our Price: $71.00
Retail: $89.99
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FiltersFast FFC16255HON 16x25x5 MERV 11 Air Filter - 2-Pack
(FFC16255HON OKGM)

The FiltersFast 16x25x5 MERV 11 Air Filter 3-Pack is a replacement pack of compatible air filters that is an upgrade the Honeywell FC100A1029 and Carrier FILCCCAR0016 air filters. This 3 pack of 16" x 25" x 5" filters features a MERV 8 rating and


In Stock! Ships in 3 to 4 business days.
FiltersFast FFC16255HON 16x25x5 MERV 11 Air Filter - 2-Pack
Our Price: $53.95
Retail: $94.99
You Save 43%!

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Honeywell FC40R1094 12x12x3 Return Grille Filter
(FC40R1094)

The Honeywell FC40R1094 is a high-efficiency, replacement air filter for return grille applications. Designed to capture airborne particles that circulate through the filter. Nominal Dimension 12x12x4. Genuine Honeywell Part.


In stock! Ships in 1 business day.
Honeywell FC40R1094 12x12x3 Return Grille Filter
As Low As: $39.50
Retail: $49.99
You Save 21%!

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Trane Perfect Fit BAYFTFR21W1A Pre-filter 21x27x1 2-Pack
(BAYFTFR21W1A)

The Trane BAYFTFR21W1A is a pre-filter for use in the following furnace: Trane BAY21WF The Trane Perfect Fit BAYFTFR21W1A Pre-filter 21x27x1 has a nominal size of 21 inches x 27 inches x 1 inch. The actual size of this Trane pre-filter is 20.7


In stock! Ships in 1 business day.
Trane Perfect Fit BAYFTFR21W1A Pre-filter 21x27x1
Our Price: $103.98

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Honeywell TRN2127T1 Replacement for Trane BAYFTFR21M, 21x27x5 Perfect Fit - 3-Pack
(TRN2127T1)

These three 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 f

Free shipping within the continental United States!

In Stock! Ships in 2 to 3 business days.
Honeywell TRN2127T1 Replacement for Trane BAYFTFR21M, 21x27x5 Perfect Fit - 3-Pack
Our Price: $154.50
Retail: $181.99
You Save 15%!

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Trane BAYFTAH26P4A Pleated 1 inch Filter 26x21x1 4-Pack
(BAYFTAH26P4A)

The Trane BAYFTAH26P4A Pleated 1 inch Filter 26x21x1 is a furnace air filter that fits several electronic and media air cleaner models from Trane. This Trane air filter boasts a MERV 8 rating for the reduction of particulates in your air, including


Special Order. Ships in 11 days.
Trane BAYFTAH26P4A Pleated 1 inch Filter 26x21x1
Our Price: $215.20

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Trane Perfect Fit BAYFTAH21W1A Prefilter 21.5x21x1 2-Pack
(BAYFTAH21W1A)

The Trane Perfect Fit BAYFTAH21W1A Prefilter 21.5x21x1 is an OEM replacement filter from Trane that features a MERV 5 rating for the reduction of airborne particulates. This Trane Perfect Fit filter fits 21 1/2" enclosures and measures approximately


Special Order. Ships in 11 days.
Trane Perfect Fit BAYFTAH21W1A Prefilter 21.5x21x1
Our Price: $41.02

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Trane BAYFRAME215, BAYFRAME215A Filter Frame Kit 21.5x21x5
(BAYFRAME215)

The Trane BAYFRAME215 is an air filter kit that fits the following air cleaner model: Trane TFM215A0AH1 The Trane BAYFRAME215A Filter Frame Kit 21.5x21x5 contains 1 plastic frame and 1 BAYFTAHEXM expandable accordion filter.

Free shipping within the continental United States!

Special Order. Ships in 11 days.
Trane BAYFRAME215, BAYFRAME215A Filter Frame Kit 21.5x21x5
Our Price: $149.95
Retail: $176.99
You Save 15%!

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Carrier CMF1620 Replacement for Totaline CMF1620 MERV11, 16x22x5 - 2-Pack
(Totaline CMF1620)

The Totaline CMF1620 Air Filter 2-Pack-16x22x5 removes atmospheric and household dust


In Stock! Ships in 2 to 3 business days.
Carrier CMF1620 Replacement for Totaline CMF1620 MERV11, 16x22x5 - 2-Pack
Our Price: $56.99
Retail: $68.99
You Save 17%!

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Honeywell TRN2427T1 Replacement for Trane BAYFTFR24M, 24x27x5 Perfect Fit Filter - 3-Pack
(TRN2427T1)

These three 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 f

Free shipping within the continental United States!

In Stock! Ships in 29 to 30 business days.
Honeywell TRN2427T1 Replacement for Trane BAYFTFR24M, 24x27x5 Perfect Fit Filter - 3-Pack
Our Price: $150.00
Retail: $179.99
You Save 17%!

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Trion Air Bear 455602-119C 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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In stock! Ships in 1 business day.
Trion Air Bear 455602-119C Supreme 1400 Media Air Cleaner
Our Price: $100.95
Retail: $120.99
You Save 17%!

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Trion Air Bear 447380-510 Right Angle Air Cleaner Merv 11
(447380-510)

The 447380-510 is the correct air cleaner that uses: 5" thick electrostatically charged pleated filter media.

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In Stock! Ships in 15 to 16 business days.
Trion Air Bear 447380-510 Right Angle Air Cleaner Merv 11
Our Price: $131.99
Retail: $155.99
You Save 15%!

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FiltersFast FFC20265WRM13 Replacement for White Rodgers F825-0549 - MERV13
(FFC20265WRM13)

The FiltersFast Brand White Rodgers F825-0549 MERV13 2Pack is a compatible alternative that's a part of the White Rodgers F825 Series residential air cleaner replacement filters.


In Stock! Ships in 2 to 3 business days.
FiltersFast FFC20265WRM13 Replacement for White Rodgers F825-0549 - MERV13
Our Price: $80.00
Retail: $99.99
You Save 20%!

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Trane Perfect Fit BAYFRAME260A Filter Kit- 26x21x5
(BAYFRAME260A)

The Trane Perfect Fit BAYFRAME260A Filter Kit- 26x21x5 is a furnace air filter that can replace the Trane BAYFTAH26M PerfectFit air filter. This Trane furnace filter can be used in the TFM260A0AH1 model air cleaner and measures approximately 26" x 2

Free shipping within the continental United States!

Special Order. Ships in 11 days.
Trane Perfect Fit BAYFRAME260A Filter Kit- 26x21x5
Our Price: $178.99
Retail: $210.99
You Save 15%!

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Trane Perfect Fit BAYFTFR14W1A Prefilter 14.5x27x1 2-Pack
(BAYFTFR14W1A)

The Trane Perfect Fit BAYFTFR14W1A Prefilter 14.5x27x1 is a washable filter with a MERV 5 rating that needs to be changed every 3 months for maximum efficiency. This Trane pre-filter includes two filters that measure approximately 12 7/8" X 14 1/4"


Special Order. Ships in 11 days.
Trane Perfect Fit BAYFTFR14W1A Prefilter 14.5x27x1 2-Pack
Our Price: $31.99
Retail: $37.99
You Save 16%!

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Carrier CMF1620 Replacement for Nordyne 918394 MERV11, 16x22x5 - 2-Pack
(918394)

The Nordyne 918394 Merv 11 Air Filter 2-Pack-16x22x5 scrubs the air of atmospheric and household dust, tobacco smoke, cooking smoke, grease, mold, fungi, mites, pollens and more down to 0.3 microns.


In Stock! Ships in 2 to 3 business days.
Carrier CMF1620 Replacement for Nordyne 918394 MERV11, 16x22x5 - 2-Pack
Our Price: $56.99
Retail: $68.99
You Save 17%!

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Trane, American Standard BAYFTAH21P4 FLR05045 5-inch Filter 4-Pack
(BAYFTAH21P4A)

The Trane / American Standard BAYFTAH21P4 FLR05045 is an air conditioning and furnace filter for use in the following application: 21 1/2 inch enclosures


Special Order. Ships in 9 days.
Trane, American Standard BAYFTAH21P4 FLR05045 5-inch Filter
Our Price: $55.80

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Trane Perfect Fit BAYFRAME210A Filter Kit- 21x27x5
(BAYFRAME210A)

The Trane BAYFRAME210A is an air filter kit that fits the following air cleaner model: Trane TFM210A0FR0 The Trane Perfect Fit BAYFRAME210A Filter Kit- 21x27x5 contains 1 plastic frame and 1 BAYFTFREXM expandable accordion filter. This Trane P

Free shipping within the continental United States!

Special Order. Ships in 8 days.
Trane Perfect Fit BAYFRAME210A Filter Kit- 21x27x5
Our Price: $159.72
Retail: $199.99
You Save 20%!

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Trane Perfect Fit BAYFTFR14P4A Filter - 14.5x27x1 4-Pack
(BAYFTFR14P4)

The Trane Perfect Fit BAYFTFR14P4A Filter - 14.5x27x1 is a furnace air filter that fits several air cleaner models from Trane. This Trane Perfect Fit filter features pleats that help capture a variety of airborne particles to purify your air. This T


In stock! Ships in 1 business day.
Trane Perfect Fit BAYFTFR14P4A Filter - 14.5x27x1
Our Price: $72.44

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Honeywell FC40R1052 16x20 Return Air Grille Filter 5-Pack
(FC40R1052)

The Honeywell FC40R1052 is a high-efficiency, replacement AC filter for return grille applications. Designed to capture airborne particles that circulate through the filter. Nominal Dimension 16x20x4. Genuine Honeywell Part.


In Stock! Ships in 1 to 2 business days.
Honeywell FC40R1052 16x20 Return Air Grille Filter
Our Price: $259.95

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Filters Fast - Furnace Filters

" Thank you for your expert service when helping me get the proper filters for my old pool and filter system. The new ones are perfect and work very well. All the best! " - Jim, Alamo, CA
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