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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 Air Bear 447380-510 Right Angle Air Cleaner Merv 11
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within the continental U.S.


In Stock!
Ships in 14 to 15 business days.

Retail: $206.95

Our Price: $179.95

Save 13%!

Trion 4008 Humidifier Filter Pad Replacement
Special Order.
Ships in 9 to 10 days.

Retail: $49.99

Our Price: $46.99

Save 6%!

FiltersFast Replacement for Duracraft ACA-1010 Air Cleaner Filter

In Stock!
Ships in 4 to 5 business days.

Retail: $24.99

Our Price: $21.99

Save 12%!

GeneralAire F1018, 4571 MERV 11 16x25x4 Media Filter
Special Order.
Ships in 8 to 9 days.

Retail: $69.99

Our Price: $59.99

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GeneralAire 100328 Ventilator Filter Replacement
Special Order.
Ships in 9 to 10 days.

Retail: $54.99

Our Price: $49.99

Save 9%!

GeneralAire 100329 Ventilator Filter Replacement
Special Order.
Ships in 7 to 8 days.

Retail: $69.99

Our Price: $52.99

Save 24%!

Lennox 98N44 MERV 8 Pleated Furnace Filter 4-Pack

In Stock!
Ships in 3 to 4 business days.

Retail: $59.99

Our Price: $49.99

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Lennox 98N45 MERV 8 Pleated Furnace Filter 4-Pack

In Stock!
Ships in 6 to 7 business days.

Retail: $59.99

Our Price: $46.96

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Lennox 91X25 MERV 8 Pleated Air Filters 4-Pack

In Stock!
Ships in 4 to 5 business days.

Retail: $64.99

Our Price: $51.96

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Lennox 92X17 HEPA Filter Cartridge Replacement
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within the continental U.S.


In Stock!
Ships in 8 to 9 business days.

Retail: $198.99

Our Price: $174.95

Save 12%!

AirCare 1050 Evaporative Humidifier Air Filter 6-Pack
Special Order.
Ships in 11 to 12 days.

Our Price: $59.94

Trion Air Bear 455602-119C Supreme 1400 Media Air Cleaner
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within the continental U.S.


In Stock!
Ships in 11 to 12 business days.

Retail: $128.95

Our Price: $111.95

Save 13%!

12488101 Refrigerator Air Filter
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Ships in 9 to 10 days.

Retail: $15.99

Our Price: $13.99

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FiltersFast 23500 Replacement for Honeywell 23500
In Stock!
Ships in 1 business day

Retail: $79.99

Our Price: $69.95

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Honeywell TRN1727T1 Replacement for Trane BAYFTFR17M, 17.5x27x5 Perfect Fit - 3-Pack
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within the continental U.S.


In Stock!
Ships in 3 to 4 business days.

Retail: $169.99

Our Price: $149.95

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Hunter 30917 HEPAtech Purifier Filter
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Ships in 11 to 12 days.

Retail: $34.99

Our Price: $30.95

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Hunter 30931 HEPAtech Purifier Filter
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Ships in 11 to 12 days.

Retail: $59.99

Our Price: $44.95

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American Metal OEMRCP0205 Replacement For GE WB02X10943

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Ships in 11 to 12 business days.

Retail: $17.99

Our Price: $14.99

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FiltersFast 14ALL Replacement For Holmes HAPF93
In Stock!
Ships in 1 business day

Retail: $19.99

As Low As: $11.95

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Honeywell FC40R1185 Return Air Grille Filter 18x18
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within the continental U.S.


In Stock!
Ships in 14 to 15 business days.

Our Price: $257.50

Honeywell 50000293-003 Post Air Filter - 10x20 2 pack

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Ships in 1 to 2 business days.

Retail: $99.99

Our Price: $74.99

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Goodman G13MU1625 Replacement Air Filters 3-Pack
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within the continental U.S.

Special Order.
Ships in 8 to 9 days.

Retail: $299.99

Our Price: $250.99

Save 16%!

FiltersFast FFC14275TRNM13 Replacement for Trane FFC14275TRNM13 14x27x5 Air Filter

In Stock!
Ships in 1 to 2 business days.

Our Price: $58.98

Trane BAYFTAH26P4A Pleated 1 inch Filter 26x21x1
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within the continental U.S.

Special Order.
Ships in 14 to 15 days.

Our Price: $219.20

Aprilaire 113 Air Filter Media for Model 1110 - MERV 13
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within the continental U.S.

Special Order.
Ships in 14 to 15 days.

Retail: $478.95

Our Price: $415.95

Save 13%!

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