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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?
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?
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Air Filters full product list:


Lennox X8345 PureAir PCO-20C MERV 16 Upgrade Kit
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within the continental U.S.


In Stock!
Ships in 2 to 3 business days.

Retail: $389.99

Our Price: $339.95

Save 13%!

FiltersFast FFC20255TABM8 Replacement for Trion AB20258 20x25x5 - 2-Pack

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Ships in 1 to 2 business days.

Retail: $49.99

Our Price: $39.95

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Honeywell 32000146-001 Humidifier Pad for HE120

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Ships in 19 to 20 business days.

Retail: $39.99

Our Price: $34.99

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FC40R1830 18x30 Honeywell Return Grille AC Filter
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within the continental U.S.


In Stock!
Ships in 1 to 2 business days.

Our Price: $222.50

Filtrete 1 Inch Carbon Odor Air Filter 14 x 25 x 1 4-Pack
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within the continental U.S.

Special Order.
Ships in 19 to 20 days.

Our Price: $99.80

FiltersFast FFC145275TRN Replacement for Trane BAYFTFR14M2 14.5x27x5 2-pack

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Ships in 1 to 2 business days.

Retail: $85.99

Our Price: $64.99

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

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Ships in 1 to 2 business days.

Retail: $59.99

Our Price: $49.95

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Totaline DTLP102-2020 20x20 MERV 11 Filter

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Ships in 2 to 3 business days.

Retail: $48.99

Our Price: $41.89

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Totaline P102-1625 16x25 MERV 11 Filter

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Retail: $49.99

Our Price: $39.95

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Trion 455600-001 Duct Mount HE Plus 2000
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within the continental U.S.


In Stock!
Ships in 19 to 20 business days.

Retail: $519.99

Our Price: $431.00

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Honeywell FC200E1003 MERV 13 Media Filter-16x20x5

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Ships in 1 to 2 business days.

Retail: $79.99

Our Price: $64.95

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Honeywell FC40R1052 16x20 Return Air Grille Filter
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within the continental U.S.


In Stock!
Ships in 5 to 6 business days.

Our Price: $264.95

Hunter 30962 QuietFlo HEPA Purifier Filter
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Ships in 10 to 11 days.

Retail: $69.99

Our Price: $59.99

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Honeywell TRN2427T1 Replacement for Trane BAYFTFR24M, 24x27x5 Perfect Fit Filter - 3-Pack
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within the continental U.S.


In Stock!
Ships in 19 to 20 business days.

Retail: $179.99

Our Price: $151.00

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Honeywell TRN2121T1 Replacement for Trane BAYFTAH21M, 21.5x21x5 Perfect Fit - 3-Pack
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within the continental U.S.


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Ships in 1 to 2 business days.

Retail: $175.99

Our Price: $150.00

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Honeywell TRN2127T1 Replacement for Trane BAYFTFR21M, 21x27x5 Perfect Fit - 3-Pack
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within the continental U.S.


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Ships in 19 to 20 business days.

Retail: $181.99

Our Price: $155.50

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American Metal OEMRCR0613 Replacement For GE WB02X10733 Microwave Filter

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Ships in 13 to 14 business days.

Retail: $24.99

Our Price: $19.99

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Carrier FILCCCAR0020 Air Purifier Filter 2-Pack
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within the continental U.S.

Special Order.
Ships in 14 to 15 days.

Retail: $99.99

Our Price: $84.95

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Trion Air Bear 255649-101 Replacement For Trion Air Bear AB316258
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Retail: $34.99

As Low As: $25.45

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Lennox X8349 Maintenance Kit for PCO-12C Air Cleaner
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within the continental U.S.


In Stock!
Ships in 1 to 2 business days.

Retail: $225.99

Our Price: $199.95

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Lennox X5425 MERV 16 Pleated Furnace Filter Media
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within the continental U.S.


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Ships in 1 to 2 business days.

Retail: $142.99

Our Price: $119.95

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FiltersFast H64-C Replacement for Honeywell HC-24
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Retail: $14.99

As Low As: $10.95

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Lennox 98N42 MERV 8 Pleated Furnace Filters 4-Pack

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Retail: $49.99

Our Price: $38.95

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FiltersFast A10PR R Replacement for Carrier P110-0007
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Retail: $19.99

As Low As: $8.95

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BestAir D18-C Replacement for Honeywell HAC-500 Humidifier Filter
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Ships in 1 business day

Retail: $14.99

As Low As: $7.95

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