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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:


Essick Air 1103 HEPA Filter Replacement
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within the continental U.S.

Special Order.
Ships in 5 to 6 days.

Our Price: $185.97

Trion Air Bear 255649-101 Replacement For Trion Air Bear AB316258
In Stock!
Ships in 1 business day

Retail: $34.99

As Low As: $25.45

Save 27%!

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


In Stock!
Ships in 2 to 3 business days.

Retail: $142.99

Our Price: $119.95

Save 16%!

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


In Stock!
Ships in 2 to 3 business days.

Retail: $114.95

Our Price: $99.95

Save 13%!

Lennox X8313 Healthy Climate HCXF20-16 MERV 16 Expandable Filter
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within the continental U.S.


In Stock!
Ships in 2 to 3 business days.

Retail: $131.99

Our Price: $109.95

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Lennox X8303 MERV 10 Expandable Filter Kit

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Ships in 5 to 6 business days.

Retail: $68.99

Our Price: $59.99

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Lennox X8304 MERV 10 Expandable Filter Kit
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within the continental U.S.


In Stock!
Ships in 1 to 2 business days.

Retail: $119.99

Our Price: $102.99

Save 14%!

Lennox X8307 MERV 16 Expandable Filter Kit
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within the continental U.S.


In Stock!
Ships in 5 to 6 business days.

Retail: $169.99

Our Price: $138.00

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Lennox 72H02 Whole House System Air Filter

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Ships in 5 to 6 business days.

Retail: $29.99

Our Price: $26.95

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BestAir A35WPR Replacement For Space-Gard #35

Out of stock

Retail: $15.99

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FiltersFast A10PR R Replacement for Carrier P110-0007
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Ships in 1 business day

Retail: $19.99

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

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FiltersFast ROHAPF220CSM Replacement for Holmes HAPF220

In Stock!
Ships in 2 to 3 business days.

Retail: $24.99

Our Price: $19.95

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Holmes HAPF41 Air Purifier Carbon Prefilter
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Ships in 5 to 6 days.

Our Price: $19.96

FiltersFast HAPF600 R Replacement for Bionaire HAPF600CS R
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Ships in 1 business day

Retail: $49.99

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BestAir R14ALLM Replacement For Bemis 1104 2-Pack
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BestAir R14ALLM Replacement For Kenmore 83237 2-Pack
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Hoover PowerDrive WindTunnel HEPA Vacuum Filter

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Retail: $19.99

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Holmes HAPF92 Carbon Odor Pre-Filter 2-Pack

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Ships in 2 to 3 business days.

Our Price: $15.98

12488101 Refrigerator Air Filter
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Retail: $15.99

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Hunter 30917 HEPAtech Purifier Filter
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Retail: $34.99

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Hunter 30931 HEPAtech Purifier Filter
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Ships in 5 to 6 days.

Retail: $59.99

Our Price: $44.95

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FiltersFast 14ALL Replacement For Holmes HAPF93
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Retail: $19.99

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American Metal Filter Replacement For GE WB02X10776

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Retail: $19.99

Our Price: $14.99

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American Metal OEMRCP0205 Replacement For GE WB02X10943

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Retail: $17.99

Our Price: $14.99

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