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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.

Trane air filters should be replaced every year to maintain air quality and excellent furnace performance.

Trane Furnace Filters full product list:


Trane FLRQB5AH23M11 MERV 11 QuikBox Filter 22.7"x20.7"x4.70" 2-Pack
(FLRQB5AH23M11)

The Trane FLRQB5AH23M11 MERV 11 QuikBox Filter 22.7" x 20.7" x 4.70" 2-Pack is the correct replacement media filter for the Trane TFM and Trane QuikBox filter cabinets.

Free shipping within the continental United States!

In Stock! Ships in 8 to 9 business days.
Trane FLRQB5AH23M11 MERV 11 QuikBox Filter 22.7"x20.7"x4.70" 2-Pack
Our Price: $79.99
Retail: $89.99
You Save 11%!

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FiltersFast FFC26215TRNM8 Replacement for Trane 21x26x5 Perfect Fit BAYFTAH26M 2-Pack
(FFC26215TRNM8)

The FiltersFast Brand Trane 21x26x5 Perfect Fit BAYFTAH26M Air Filter is an economical compatible alternative for the genuine OEM 21x26x5 Trane Perfect Fit BAYFTAH26M Filter.


In Stock! Ships in 2 to 3 business days.
FiltersFast FFC26215TRNM8 Replacement for Trane 21x26x5 Perfect Fit BAYFTAH26M 2-Pack
Our Price: $52.00
Retail: $69.99
You Save 26%!

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Trane BAYFTFREXM2 FLR06232 Expandable Replacement-2-Pack
(BAYFTFREXM2)

The Trane BAYFTFREXM2 FLR06232 Expandable Replacement Media is a pair of furnace air filters that can only be used with a Retrofit Frame Kit already installed. This Trane air filter measures approximately 25" in length x 5" in thickness.


In stock! Ships in 1 business day.
Trane BAYFTFREXM2 FLR06232 Expandable Replacement-2-Pack
Our Price: $61.95
Retail: $71.99
You Save 14%!

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FiltersFast FFC215215TRN Replacement for Trane Perfect Fit BAYFTAH21M 21.5x21x5 (2-Pack)
(FF-BAYFTAH21M)

These MERV 11 Furnace Filters are compatible upgrades over Trane Perfect Fit Air Filters. These FiltersFast Air Filters specifically replace Trane part number BAYFTAH21M, BAYFTAH21M2 or FLR06072.


In Stock! Ships in 11 to 12 business days.
FiltersFast FFC215215TRN Replacement for Trane Perfect Fit BAYFTAH21M 21.5x21x5 (2-Pack)
Our Price: $60.95
Retail: $98.99
You Save 38%!

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Trane Perfect Fit BAYFTAH23M2 21"x23.5"x5"
(BAYFTAH23M2)

The Trane Perfect Fit BAYFTAH23M2 23.5x21x5 Air Filter is a replacement air filter for the Trane model BAYFRAME215A and TFM215A0AH1 air cleaners. The Trane Perfect Fit filter measures approximately 23.5" x 21" x 5" and features a MERV 8 rating for t


In stock! Ships in 1 business day.
Trane Perfect Fit BAYFTAH23M2  21"x23.5"x5"
As Low As: $44.99
Retail: $61.99
You Save 27%!

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FiltersFast FFC175275TRN Replacement for Trane Perfect Fit BAYFTFR17M 17.5x27x5 2pk
(FFC175275TRN)

These MERV 11 Furnace Filters are compatible upgrades over Trane Perfect Fit Air Filters. These FiltersFast Air Filters specifically replace Trane part number BAYFTFR17M or FLR06069, which is a 17.5x27x5 Air Filter used in several Trane Air Cleaner.


In Stock! Ships in 2 to 3 business days.
FiltersFast FFC175275TRN Replacement for Trane Perfect Fit BAYFTFR17M 17.5x27x5 2pk
Our Price: $71.99
Retail: $99.99
You Save 28%!

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Trane BAYFTAHEXM2 Expandable Replacement Media
(BAYFTAHEXM2)

The Trane BAYFTAHEXM2 Expandable Replacement Media is a set of two furnace air filters that require the use of a Retrofit Frame Kit to be operable. This Trane Perfect Fit filter measures approximately 20 inches in length and 5 inches in thickness. T


In stock! Ships in 1 business day.
Trane BAYFTAHEXM2 Expandable Replacement Media
As Low As: $48.99
Retail: $79.99
You Save 39%!

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FiltersFast FFC21235TRN Replacement for Trane Perfect Fit BAYFTAH23M 21x23.5x5 2pk
(FFC21235TRN)

These MERV 11 Furnace Filters are compatible upgrades over Trane Perfect Fit Air Filters. These FiltersFast Air Filters specifically replace Trane part number BAYFTAH23M or FLR06073, which is a 21x23.5x5 Air Filter used in several Trane Air Cleaner.

Free shipping within the continental United States!

In Stock! Ships in 10 to 11 business days.
FiltersFast FFC21235TRN Replacement for Trane Perfect Fit BAYFTAH23M 21x23.5x5 2pk
Our Price: $79.95
Retail: $98.99
You Save 19%!

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FiltersFast FFC215215TRNM8 Replacement for Trane 21x21.5x5 BAYFTAH21M FLR06072 2-Pack
(FFC215215TRNM8)

This FiltersFast Filter for Trane 21x21.5x5 BAYFTAH21M 2 Pack Model FLR06072 and BAYFTAH21M2 is an economical compatible version of the genuine OEM Trane Perfect Fit 21.5x21x5 Filter.


In Stock! Ships in 2 to 3 business days.
FiltersFast FFC215215TRNM8 Replacement for Trane 21x21.5x5 BAYFTAH21M FLR06072 2-Pack
Our Price: $50.95
Retail: $69.99
You Save 27%!

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Trane Perfect Fit BAYFTAH26M2 FLR06074 MERV 8 26x21x5
(BAYFTAH26M2A)

The Trane / American Standard Perfect Fit BAYFTAH26M2 FLR06074 26x21x5 is a furnace air filter that fits several high efficiency air cleaners from Trane and American Standard.


In stock! Ships in 1 business day.
Trane Perfect Fit BAYFTAH26M2 FLR06074 MERV 8 26x21x5
As Low As: $47.95
Retail: $59.99
You Save 20%!

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FiltersFast FFC21235TRNM8 Replacement for Trane 21x23x5 Perfect Fit BAYFTAH23M 2-Pack
(FFC21235TRNM8)

For an economical alternative to the genuine OEM Trane 21x23x5 Perfect Fit BAYFTAH23M Filter, try this FiltersFast Brand 21x23x5 Perfect Fit BAYFTAH23M 2pk.


In Stock! Ships in 2 to 3 business days.
FiltersFast FFC21235TRNM8 Replacement for Trane 21x23x5 Perfect Fit BAYFTAH23M 2-Pack
Our Price: $67.00
Retail: $77.99
You Save 14%!

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Trane BAYFTAH21M2, BAYFTAH21M, FLR06072 Air Filter 21.5x21x5
(BAYFTAH21M2)

The Trane BAYFTAH21M2, BAYFTAH21M, FLR06072 Air Filter 21.5x21x5 21.5x21x5 fits the TFM215B0AH0 Perfect Fit High Efficiency Air Cleaner. This Trane Perfect Fit filter has a MERV 8 rating that helps purify your air and improve overall indoor air.


In stock! Ships in 1 business day.
Trane BAYFTAH21M2, BAYFTAH21M, FLR06072 Air Filter 21.5x21x5
As Low As: $44.95
Retail: $55.99
You Save 20%!

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Trane Perfect Fit BAYFTFR21M2 FLR06070 Filter-21x27x5
(BAYFTFR21M2A)

The Trane Perfect Fit BAYFTFR21M2 FLR06070 Filter Kit- 21x27x5 features a MERV 8 rating for the reduction of dust, dirt, and various allergens in your air, and the improvement of indoor air quality.


In stock! Ships in 1 business day.
Trane Perfect Fit BAYFTFR21M2 FLR06070 Filter-21x27x5
As Low As: $45.95
Retail: $59.99
You Save 23%!

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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.


Out of stock
Trane Perfect Fit BAYFTFR17P4 FLR05049 Filter-17.5x27x1
As Low As: $18.95
Retail: $24.99
You Save 24%!

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Trane FLRQB5FR17M11 MERV 11 QuikBox Filter 16.5"x26"x4.70" 2-Pack
(FLRQB5FR17M11)

The Trane FLRQB5FR17M11 MERV 11 QuikBox Filter 16.5" x 26" x 4.70" 2-Pack is the correct replacement media filter for the Trane TFM and Trane QuikBox filter cabinets.


In Stock! Ships in 4 to 5 business days.
Trane FLRQB5FR17M11 MERV 11 QuikBox Filter 16.5"x26"x4.70" 2-Pack
Our Price: $57.85
Retail: $89.99
You Save 36%!

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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: $47.99
Retail: $55.99
You Save 14%!

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FiltersFast FFC21275TRNM8 Replacement for Trane 21x27x5 Perfect Fit BAYFTFR21M - 2-Pack
(FFC21275TRNM8)

The FiltersFast Brand Trane 21x27x5 Perfect Fit BAYFTFR21M Filter is an economical compatible alternative to the genuine OEM Trane 21x27x5 Perfect Fit BAYFTFR21M Filter.


In Stock! Ships in 2 to 3 business days.
FiltersFast FFC21275TRNM8 Replacement for Trane 21x27x5 Perfect Fit BAYFTFR21M - 2-Pack
Our Price: $67.00
Retail: $77.99
You Save 14%!

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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 7 to 8 business days.
FiltersFast FFC24265TRN Replacement for Trane PerfectFit BAYFTFR24M 24.5x27x5 2-Pack
Our Price: $71.95
Retail: $110.99
You Save 35%!

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FiltersFast FFC21275TRNM11 Replacement for Trane Perfect Fit BAYFTFR21M 21x27x5 (2 Pack)
(FF-BAYFTFR21M)

These MERV 11 FiltersFast Brand compatible Furnace Filters are replacement filters for Trane Perfect Fit Air Filters. These FiltersFast Air Filters replace Trane part number BAYFTFR21M or FLR06070 , which is used in several Trane Air Cleaner models

Free shipping within the continental United States!

In Stock! Ships in 2 to 3 business days.
FiltersFast FFC21275TRNM11 Replacement for Trane Perfect Fit BAYFTFR21M 21x27x5 (2 Pack)
Our Price: $91.95
Retail: $109.99
You Save 16%!

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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 2 to 3 business days.
FiltersFast FFC26215TRNM13 Replacement for Trane BAYFTAH26M, 21x26x5 Perfect Fit - MERV13, 2-Pack
Our Price: $112.00
Retail: $139.99
You Save 20%!

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FiltersFast FFC175275TRN M13 Replacement for Trane Perfect Fit 17.5x27x5 MERV13 - 2-Pack
(FFC175275TRN M13)

These FiltersFast Brand MERV 13 Furnace Filters replace Trane Perfect Fit Air Filters with the part number BAYFTFR17M or FLR06069, which are 17.5x27x5 air filters used in several Trane Air Cleaner models.

Free shipping within the continental United States!

In Stock! Ships in 3 to 4 business days.
FiltersFast FFC175275TRN M13 Replacement for Trane Perfect Fit 17.5x27x5 MERV13 - 2-Pack
Our Price: $91.99
Retail: $116.99
You Save 21%!

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FilterFast FFC215215TRNM13 Replacement for Trane BAYFTAH21M, 21.5x21x5 Perfect Fit - MERV13, 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.


In Stock! Ships in 4 to 5 business days.
FilterFast FFC215215TRNM13 Replacement for Trane BAYFTAH21M, 21.5x21x5 Perfect Fit - MERV13, 2-Pack
Our Price: $70.95
Retail: $139.99
You Save 49%!

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Trane FLRQB5FR21M11 MERV 11 QuikBox Filter 20.2"x26"x4.70" 2-Pack
(FLRQB5FR21M11)

The Trane FLRQB5FR21M11 MERV11 QuikBox Media Filter 20.2" x 26" x 4.70" 2-Pack is the correct replacement media filter.

Free shipping within the continental United States!

In Stock! Ships in 2 to 3 business days.
Trane FLRQB5FR21M11 MERV 11 QuikBox Filter 20.2"x26"x4.70" 2-Pack
Our Price: $77.99
Retail: $99.99
You Save 22%!

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Trane Perfect Fit BAYFTFR17W1A Washable Prefilter 17.5x27x1
(BAYFTFR17W1A)

The Trane Perfect Fit BAYFTFR17W1A Prefilter 17.5x27x1 is a washable filter with a MERV 5 rating that needs to be changed every 3 months for maximum efficiency. This Trane pre-filter measures approximately 17.5" x 27" x 1", is used with 17.5" enclos


In stock! Ships in 1 business day.
Trane Perfect Fit BAYFTFR17W1A Washable Prefilter 17.5x27x1
Our Price: $22.95
Retail: $25.99
You Save 12%!

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Honeywell TRN2321T1 Replacement for Trane BAYFTAH23M, 23.5x21x5 Perfect Fit - 3-Pack
(TRN2321T1)

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 1 business day.
Honeywell TRN2321T1 Replacement for Trane BAYFTAH23M, 23.5x21x5 Perfect Fit - 3-Pack
Our Price: $150.00
Retail: $175.99
You Save 15%!

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