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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.

FiltersFast furnace air filters offer an affordable option to excellent indoor air quality. These replacement home furnace filters will cost you much less than what you will save on your energy efficiency.


FiltersFast Furnace Filters full product list:


FiltersFast FFC16253TABM13 Replacement for Trion 16x25x3 Air Bear MERV13 3-Pack
(FFC16253TABM13)

The FiltersFast Brand Trion 16x25x3 Air Bear MERV13 3-Pack Filter is a compatible version of the genuine Trion Air Bear Media AC Filter 16x25x3, 255649-101.


In Stock! Ships in 2 to 3 business days.
FiltersFast FFC16253TABM13 Replacement for Trion 16x25x3 Air Bear MERV13 3-Pack
Our Price: $84.00
Retail: $100.00
You Save 16%!

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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.


In Stock! Ships in 1 to 2 business days.
FiltersFast FFC20205HONM13 Replacement for Honeywell FC100A1011, 20x20x5 2-Pack
Our Price: $80.99
Retail: $90.00
You Save 10%!

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FiltersFast MERV 8 Pleated 1" Panel Filter 6-Pack
(FFM8PLEAT1)

The FiltersFast MERV 8 Pleated 1" Panel Filter 6-Pack is a set of replacement air filters for ideal use as service pleats or prefilters in commercial HVAC systems or industrial air cleaners. These pleated media filters arrive in a 6 pack and are ef


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FiltersFast MERV 8 Pleated 1" Panel Filter 6-Pack
Our Price: $39.95
Retail: $49.95
You Save 20%!

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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!


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FiltersFast FFC16255TAB Trion Compatible 16x25x5, 2-Pack
Our Price: $56.00
Retail: $83.00
You Save 33%!

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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 1 to 2 business days.
FilterFast FFC215215TRNM13 Replacement for Trane BAYFTAH21M, 21.5x21x5 Perfect Fit - MERV13, 2-Pack
Our Price: $69.95
Retail: $140.00
You Save 50%!

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FiltersFast FFC20265WRM8 Replacement for White Rodgers 20x26x5 F825-0549 2-Pack
(FFC20265WRM8)

The FiltersFast Brand 20x26x5 Air Filter F825-0549 is a compatible alternative for the OEM White Rodgers 20x26x5 Air Filter. This filter is made of fine carbon powder bonded to lofted polyester media for odor reduction.


In Stock! Ships in 2 to 3 business days.
FiltersFast FFC20265WRM8 Replacement for White Rodgers 20x26x5 F825-0549 2-Pack
Our Price: $41.99
Retail: $50.00
You Save 16%!

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FiltersFast FFC20205HONM8 Replacement for Honeywell FC100A1011 - 20x20x5 2-Pack
(FFC20205HONM8)

FiltersFast Brand Honeywell 20x20x5 FC100A1011 2-Pack Air Filter is an economical compatible version of the OEM Honeywell FC100A1011 20"x20" Media AC Filter. To save money, this air filter replacement comes in a 2pk value set.


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FiltersFast FFC20205HONM8 Replacement for Honeywell FC100A1011 - 20x20x5 2-Pack
Our Price: $44.90
Retail: $50.00
You Save 10%!

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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.

Free shipping within the continental United States!

In Stock! Ships in 1 to 2 business days.
FiltersFast FFC21235TRNM13 Replacement for Trane BAYFTAH23M, 21x23x5 Perfect Fit
Our Price: $90.95
Retail: $140.00
You Save 35%!

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FiltersFast 1" Air Filters MERV 8 Replacement for Aerostar Air Filters 6-Pack
(FFM8 6pk AS)

The FiltersFast 1" Air Filters MERV 8 With Pleats 6-Pack is the compatible replacement for the Aerostar Air Filters MERV 8 1" Air Filter.


In Stock! Ships in 1 to 2 business days.
FiltersFast 1" Air Filters MERV 8 Replacement for Aerostar Air Filters 6-Pack
Our Price: $43.95
Retail: $49.99
You Save 12%!

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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.


In Stock! Ships in 2 to 3 business days.
FiltersFast 1" Air Filters MERV 13 Replacement for Nordic Pure  1" MERV 12 6-Pack
Our Price: $59.95
Retail: $69.99
You Save 14%!

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FiltersFast FFC24265TRNM8 Replacement for Trane Perfect Fit BAYFTFR24M 2-Pack
(FFC24265TRNM8)

FiltersFast Brand Trane 24.5x27x5 Perfect Fit BAYFTFR24M air filter replacements are specifically designed to replace OEM Trane Perfect Fit BAYFTFR24M air filters.


In Stock! Ships in 1 to 2 business days.
FiltersFast FFC24265TRNM8 Replacement for Trane Perfect Fit BAYFTFR24M 2-Pack
Our Price: $50.95
Retail: $70.00
You Save 27%!

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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


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FiltersFast FFC16255HON 16x25x5 MERV 11 Air Filter - 2-Pack
Our Price: $53.95
Retail: $94.99
You Save 43%!

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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.


In Stock! Ships in 1 to 2 business days.
FiltersFast 1" Air Filters MERV 8 Replacement for Nordic Pure MERV 8 6-Pack
Our Price: $43.95
Retail: $49.99
You Save 12%!

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FiltersFast FFC21275TRNM13 Replacement for Trane BAYFTFR21M, 21x27x5 Perfect Fit - MERV13, 2-Pack
(FFC21275TRNM13)

FiltersFast Brand Trane 21x27x5 Perfect Fit BAYFTFR21M M13 x2 is an economical compatible version of the genuine Trane 21x27x5 Perfect Fit Air Filter.

Free shipping within the continental United States!

In Stock! Ships in 2 to 3 business days.
FiltersFast FFC21275TRNM13 Replacement for Trane BAYFTFR21M, 21x27x5 Perfect Fit - MERV13, 2-Pack
Our Price: $111.00
Retail: $140.00
You Save 21%!

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FiltersFast FFC16205HONM13 Replacement for Honeywell FC100A1003
(FFC16205HONM13)

The FiltersFast FFC16205HONM13 compatible air filter replaces the Honeywell FC100A1003 and effectively reduces indoor air contaminants using a deep pleated filter media.


In Stock! Ships in 1 to 2 business days.
FiltersFast FFC16205HONM13 Replacement for Honeywell FC100A1003
Our Price: $57.95
Retail: $64.95
You Save 11%!

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FiltersFast FFC16265WR Replacement for White Rodgers F825-0548 16x26x5 2-Pack
(FFC16265WR)

The FiltersFast Compatible 16x26x5 MERV 11 Air Filter can be used as an upgrade for White Rodgers part number F825-0548. Upgrade your White Rodgers Media Filter today and get a better filter for the same price as the original manufacturer's brand!


In Stock! Ships in 1 to 2 business days.
FiltersFast FFC16265WR Replacement for White Rodgers F825-0548 16x26x5 2-Pack
Our Price: $45.95
Retail: $55.25
You Save 17%!

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FiltersFast 1" Air Filters MERV 11 Replacement for Nordic Pure MERV 10 6-Pack
(FFM11 6pk ND)

The FiltersFast FFM11 6-Pack is the compatible replacement for the Nordic Pure 1" MERV 10 Air Filters.


In Stock! Ships in 2 to 3 business days.
FiltersFast 1" Air Filters MERV 11 Replacement for Nordic Pure MERV 10 6-Pack
Our Price: $55.50
Retail: $77.94
You Save 29%!

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FiltersFast FFC24265TRNM13 Replacement for Trane BAYFTFR24M, 24x26x5 Perfect Fit - 2-Pack
(FFC24265TRNM13)

FiltersFast Brand Trane 24x26x5 Perfect Fit BAYFTFR24M

Free shipping within the continental United States!

In Stock! Ships in 3 to 4 business days.
FiltersFast FFC24265TRNM13 Replacement for Trane BAYFTFR24M, 24x26x5 Perfect Fit - 2-Pack
Our Price: $80.95
Retail: $140.00
You Save 42%!

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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 2 to 3 business days.
FiltersFast FFC16265WRMM13 Replacement for White Rodgers F825-0548, 16x26x5 - 2-Pack
Our Price: $71.00
Retail: $90.00
You Save 21%!

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FiltersFast 1" Air Filters MERV 8 Replacement for Rheem FPR 4 6-Pack
(FFM8 6pk RH)

The FiltersFast FFM8 6-Pack is the compatible replacement for the Rheem Basic Household Pleated Air Filter.


In Stock! Ships in 1 to 2 business days.
FiltersFast 1" Air Filters MERV 8 Replacement for Rheem FPR 4 6-Pack
Our Price: $43.95
Retail: $49.99
You Save 12%!

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FiltersFast 5" FFC175275TRN OKGM Air Filter - 2-Pack
(FFC175275TRN OKGM)

The FiltersFast 5" Trane Compatible FFC175275TRN OKGM is a compatible replacement air filter that replaces the Trane BAYFTFR17M and Trane FLR06069 air filters, both of which can be used in several models of Trane Air Cleaners. This 5" filter boasts


In Stock! Ships in 1 to 2 business days.
FiltersFast 5" FFC175275TRN OKGM Air Filter - 2-Pack
Our Price: $70.99
Retail: $104.99
You Save 32%!

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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 1 to 2 business days.
FiltersFast FFC20265WRM13 Replacement for White Rodgers F825-0549 - MERV13
Our Price: $80.00
Retail: $100.00
You Save 20%!

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FiltersFast FFC16205HONM8 Replacement for Honeywell FC100A1003 MERV8, 16x20x5 - 2-Pack
(FFC16205HONM8)

The FiltersFast FFC16205HONM8 compatible air filter replaces the Honeywell FC100A1003 and utilizes an extra deep pleated media for greater filtration capacities.


In Stock! Ships in 1 to 2 business days.
FiltersFast FFC16205HONM8 Replacement for Honeywell FC100A1003 MERV8, 16x20x5 - 2-Pack
Our Price: $40.95
Retail: $49.95
You Save 18%!

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FiltersFast IH1A2323BSOANPHO HEPA Filter Replacement for Purolator WGB432379 - 23.3X23.3x11.5
(WGB432379)

The Commercial HEPA Filter Replacement 23-3/8" x 23-3/8" x 11-1/2" High Capacity is the correct replacement for the Purolator WGB432379.

Free shipping within the continental United States!

Out of stock
FiltersFast IH1A2323BSOANPHO HEPA Filter Replacement for Purolator WGB432379 - 23.3X23.3x11.5
Our Price: $249.99
Retail: $266.00
You Save 6%!

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FiltersFast IH2A2323BSOANPSO HEPA Replacement for Koch BioMax H64A3X2 - 23.3x23.3x11.5
(H64A3X2)

The Commercial HEPA Filter Replacement 23-3/8" x 23-3/8" x 11-1/2" Standard Capacity is the correct replacement for the Koch BioMax H64A3X2.

Free shipping within the continental United States!

In Stock! Ships in 2 to 3 business days.
FiltersFast IH2A2323BSOANPSO HEPA Replacement for Koch BioMax H64A3X2 - 23.3x23.3x11.5
Our Price: $222.95
Retail: $224.95
You Save 1%!

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Filters Fast - FiltersFast Furnace Filters

" Just to express my complete satisfaction with your ordering process and, of course, great pricing. When I need a replacement of refrigerator or HVAC filters, I'll be contacting you again. " - Frank, Corona, CA
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