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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 X6669 PCO-20C 21X26X4 Merv 16 Filter Replacement
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within the continental U.S.

In Stock!
Ships in 3 to 4 business days.

Retail: $150.99

Our Price: $130.95

Save 13%!

Aprilaire 1213 Upgrade Kit - Aprilaire 2200 & 2120
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Retail: $79.99

As Low As: $61.75

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GeneralAire HF500 HEPA Filter for AC500
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within the continental U.S.

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Retail: $149.99

Our Price: $129.95

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FiltersFast 1" Air Filters MERV 8 Replacement for Nordic Pure MERV 8 6-Pack
In Stock!
Ships in 1 to 2 business days.

Retail: $67.99

Our Price: $57.95

Save 15%!

Lennox Y6606 PCO3-14-16 Air Filtration Filter PureAir 100908-12
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within the continental U.S.

In Stock!
Ships in 2 to 3 business days.

Retail: $170.99

Our Price: $120.99

Save 29%!

Trion Air Bear 259112-103 Supreme Filter 20x20x5 MERV11

Out of stock

Retail: $49.95

Our Price: $39.95

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FiltersFast A10PR R Replacement for American Standard BAYPAD01A1010A
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Retail: $19.99

As Low As: $8.95

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Carrier EXPXXFIL0024 EZ-FLEX Air Purifier Filter
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Retail: $99.99

Our Price: $59.95

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Lennox X8312 HCXF16-16 MERV 16 Expandable Filter 16x25x5
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within the continental U.S.

In Stock!
Ships in 2 to 3 business days.

Retail: $145.99

As Low As: $105.95

Save 27%!

GeneralAire 4368 Replacement for GeneralAire 4356 Filter Media
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Ships in 1 business day

Retail: $49.99

Our Price: $34.99

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FiltersFast 1" Air Filters MERV 8 Replacement for Rheem FPR 4 6-Pack
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Ships in 1 to 2 business days.

Retail: $67.99

Our Price: $57.95

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Lennox X4138 HEPA 40-60 Carbon PreFilter
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Ships in 2 to 3 business days.

Retail: $60.99

Our Price: $43.95

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Lennox X0584 MERV 11 Pleated Media Filter BMAC-14CE
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Ships in 3 to 4 business days.

Retail: $82.99

As Low As: $45.95

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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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Ships in 1 business day

Retail: $109.99

Our Price: $98.99

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FiltersFast FF 30930 Replacement for Hunter 30930
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Retail: $24.99

As Low As: $16.95

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Filtrete Odor Reduction Air Filter - 14 x 24 x 1

Out of stock

Retail: $179.99

Our Price: $29.95

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Lennox X5424 PMAC-20C MERV 16 25x20x6 Furnace Filter Media
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within the continental U.S.

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Ships in 2 to 3 business days.

Retail: $143.99

Our Price: $120.95

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Lennox X7930 Furnace Filter Cabinet
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within the continental U.S.

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Ships in 1 to 2 business days.

Retail: $115.95

Our Price: $100.95

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FiltersFast FF 30936 Replacement for Hunter 30936
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Retail: $49.99

Our Price: $34.95

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Filtrete Home Odor Air Filter - 16 x 20 x 1
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Our Price: $67.96

FiltersFast FFC245275TRN Replacement for Trane BAYFTFR24M2, 24.5x27x5 - 2-Pack
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within the continental U.S.

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Ships in 1 to 2 business days.

Retail: $90.99

Our Price: $80.95

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FiltersFast FFC16205HONM13 Replacement for Honeywell FC100A1003
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Ships in 1 to 2 business days.

Retail: $79.99

Our Price: $65.95

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Honeywell 203369 Pre-Filter 12.5 x 20 x 11/32 2-Pack
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Retail: $69.99

Our Price: $59.95

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Honeywell FC100A1029 Replacement for Honeywell 203719 - 16x25x5
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Retail: $46.99

Our Price: $39.99

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FiltersFast 1" Air Filters MERV 8 Replacement for Aerostar Air Filters 6-Pack
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Retail: $67.99

Our Price: $57.95

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