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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:


Trion 259112-101 Air Bear Cub Filter 16x25x3 MERV 11 - 6-Pack
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within the continental U.S.

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Retail: $109.99

Our Price: $98.99

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FiltersFast FFC21275TRNM13 Replacement for Trane BAYFTFR21M, 21x27x5 Perfect Fit - MERV13, 2-Pack
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within the continental U.S.


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Retail: $139.99

Our Price: $89.95

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Lennox X8348 PCO-20C MERV 10 Filter Maintenance Kit
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within the continental U.S.


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Ships in 2 to 3 business days.

Retail: $354.99

Our Price: $299.95

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GeneralAire 4367 Replacement for GeneralAire 4354 - GA100A11
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Retail: $45.99

Our Price: $39.99

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

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Retail: $69.99

Our Price: $59.95

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FiltersFast 1" MERV 11 Replacement For Honeywell 14x14x1 MERV 11 6-Pack

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Retail: $69.99

Our Price: $69.95

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FiltersFast FFC16205HONM13 Replacement for Honeywell FC100A1003

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Retail: $78.99

Our Price: $64.95

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FiltersFast 1" Air Filters MERV 8 Replacement for Nordic Pure MERV 8 6-Pack

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Retail: $66.99

Our Price: $56.95

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FiltersFast 1" Air Filters MERV 11 Replacement for Aerostar 1" MERV 11 6-Pack

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Retail: $77.99

Our Price: $69.95

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FiltersFast RHF0525 Aluminum Range Hood Filter

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Retail: $19.99

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FiltersFast 1" Air Filters MERV 8 Replacement for Aerostar Air Filters 6-Pack

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Retail: $66.99

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MERV 11 Geothermal 2" FiltersFast Air Filters 6-Pack
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within the continental U.S.


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Retail: $99.99

Our Price: $84.95

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Honeywell FC100A1029 Replacement for Honeywell FC35A1001 - 16x25x5
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Retail: $46.99

Our Price: $39.99

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Honeywell FC100A1003 Replacement for Honeywell FC35A1035 - 16x20x5
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Retail: $49.99

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FiltersFast FFC20265WR Replacement for White Rodgers F825-0549 20x26x5 2Pack

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Retail: $79.99

Our Price: $59.95

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Carrier FILCCCAR0016 Air Purifier Filter
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Retail: $49.99

Our Price: $39.99

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FiltersFast FFC20205TABM8 20x20x5 Replacement for Skuttle 000-0448-003 2-Pack

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Retail: $50.99

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GeneralAire F1020, 4562 MERV 13 Filter Media Replacement
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within the continental U.S.

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Ships in 7 to 8 days.

Retail: $85.99

Our Price: $79.95

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BestAir A10WPR Replacement for Carrier P1101045 Humidifier Filter
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Retail: $19.99

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Lennox X8347 MERV 16 Filter Maintenance Kit for PCO-12C
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within the continental U.S.


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Retail: $346.99

Our Price: $309.95

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Duracraft 5010 Replacement for Honeywell 10590 HEPA Filter
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Retail: $59.99

Our Price: $39.99

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Lennox 92X09 Healthy Climate 93014-21 HEPA 40-60 Carbon Filter

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Retail: $59.99

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GeneralAire 401-13156 MERV 11 Filter Media
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GeneralAire GA23 Humidifier Vapor Pad Replacement Part 7923
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Our Price: $159.90

Honeywell FC100A1003 Replacement for Honeywell 209894 - 16x20x5
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Retail: $49.99

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