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Air Filter Shield

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?

Yes, both AC filters and furnace filters are the same thing. We categorize filters based on their intended use to make filter shopping easier for the customer. During the summer months you are more likely to search for AC filters. While during colder winter months you are looking to buy furnace filters. A good tip for remembering when to change your filters is to replace them at the start of each new season.

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?

Yes, Filtersfast, Filtrete, Carrier, among many other air filter brands use an electrostatically charged filter media. Fiberglass air filters are far less common today and were never designed to improve air quality, rather they protect HVAC systems from large dirt and debris.


Air Filters full product list:


Honeywell FC100A1003 Replacement for Honeywell FC35A1035 - 16x20x5
(FC35A1035 R)

The Honeywell FC35A1035 R is a replacement air cleaner filter that is the correct compatible replacement for the following air filter: Honeywell FC100A1003 The Honeywell FC35A1035 Furnace/ AC Air Filter 16x20x5 fits Honeywell 16 inch x 20 inch


In stock! Ships in 1 business day.
Honeywell FC100A1003 Replacement for Honeywell FC35A1035 - 16x20x5
As Low As: $31.99
Retail: $49.99
You Save 36%!

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FiltersFast RHF0525 Aluminum Range Hood Filter
(FFMH-006)

The FiltersFast FFMH-006 Oven Hood Range Filter is the compatible replacement filter for the American Metal Filter RHF0525 and Whirlpool 6802A.


In Stock! Ships in 7 to 8 business days.
FiltersFast RHF0525 Aluminum Range Hood Filter
As Low As: $8.95
Retail: $14.99
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Crane HS-1934 Replacement Air Purifier Filter Set
(HS-1934)

The Crane HS-1934 replacement air purifier filter kit features an advanced four level filtration system which removes germs, viruses, and bacteria as well as many different airborne allergens such as dust, pollen, smoke, pet dander, mold spores.


In stock! Ships in 1 business day.
Crane HS-1934 Replacement Air Purifier Filter Set
Our Price: $22.99
Retail: $27.99
You Save 18%!

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BestAir A10WPR Replacement for Aprilaire 550 Humidifier Water Panel
(A10WPR)

The BestAir A10WPR fits Aprilaire, Chippewa, Hamilton, Honeywell, Lasko, Totaline, Healthy Climate and Lennox Humidifier systems.


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BestAir A10WPR Replacement for Aprilaire 550 Humidifier Water Panel
Our Price: $16.99
Retail: $19.99
You Save 15%!

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Lennox 75X66 Genuine Metal Mesh Insert Fits PureAir Model PCO-2OC
(75X66)

The Lennox 75X66 Metal Mesh Filter is the correct replacement for the following air cleaner: Lennox Pureair PCO-2OC

Free shipping within the continental United States!

In Stock! Ships in 3 to 4 business days.
Lennox 75X66 Genuine Metal Mesh Insert Fits PureAir Model PCO-2OC
Our Price: $100.95
Retail: $199.99
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BestAir A12WPR Replacement for Aprilaire 440 Humidifier Water Panel Evaporator
(A12WPR)

The BestAir A12WPR Humidifier Water Panel is a replacement water pad for your Aprilaire humidifier. This water pad helps to bring humidified air into your home.


In stock! Ships in 1 business day.
BestAir A12WPR Replacement for Aprilaire 440 Humidifier Water Panel Evaporator
Our Price: $11.99
Retail: $14.99
You Save 20%!

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GeneralAire 4365 Replacement for GeneralAire 4350 MERV 10 Filter
(4350)

The GeneralAire GA100A03 16x20 MERV10 Filter Media is used on Honeywell F25 Series, F35 Series, F100 Series & F150 Series Media Style Air Cleaners, as well as Honeywell FC100A1003, F100F1004, F100B1008, F100F2028, and F150E1000 Air Cleaners.


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GeneralAire 4365 Replacement for GeneralAire 4350 MERV 10 Filter
Our Price: $35.99
Retail: $41.99
You Save 14%!

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Hunter 30936 QuietFlo HEPA Purifier Filter
(30936)

The Hunter 30936 QuietFlo HEPA Purifier Filter is an electrostatically-charged filter that captures 99.97% of particles as small as 0.3 microns.


Special Order. Ships in 7 days.
Hunter 30936 QuietFlo HEPA Purifier Filter
Our Price: $59.95
Retail: $299.99
You Save 80%!

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BestAir A35WPR Replacement For Lennox WB2-17 WB2-18
(WB2-17 WB2-18 R)

The Lennox WB2-17 WB2-18 Humidifier Water Panel Filter will help keep your humidifier running at its best. This humidifier panel measure 10" x 13 1/4" x 1.5" inches and the honeycomb design will trap mineral pollutants keeping them out of your humid


In stock! Ships in 1 business day.
BestAir A35WPR Replacement For Lennox WB2-17 WB2-18
As Low As: $12.45
Retail: $15.99
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Lennox 75X73 Metal Mesh Filter Catalyst Insert Assembly
(75X73)

The Lennox 75X73 Metal Mesh Filter is a replacement metal mesh filter for the Lennox PCO-12C and PCO-12U. This metal air filter is constructed out of titanium dioxide and coated with a honeycomb screen.

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In Stock! Ships in 4 to 5 business days.
Lennox 75X73 Metal Mesh Filter Catalyst Insert Assembly
Our Price: $100.95
Retail: $189.99
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FiltersFast FFC245275TRN Replacement for Trane BAYFTFR24M2, 24.5x27x5 - 2-Pack
(FFC245275TRN)

The FiltersFast Brand Trane 24.5x27x5 BAYFTFR24M2 2 Pack compatible air filter captures airborne pollutants that can cause a negative impact on respiratory health


In Stock! Ships in 4 to 5 business days.
FiltersFast FFC245275TRN Replacement for Trane BAYFTFR24M2, 24.5x27x5 - 2-Pack
Our Price: $55.95
Retail: $64.99
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Filtrete Home Odor Air Filter- 14 x 20 x 1
(Filtrete-Odor-14201)

The Filtrete Home Odor Air Filter- 14 x 20 x 1 effectively removes common odors in your home while also trapping airborne contaminants. This odor filter is constructed with activated carbon to remove odors like pet, smoke, cooking, mildew, and clean


Special Order. Ships in 13 days.
Filtrete Home Odor Air Filter- 14 x 20 x 1
Our Price: $22.61
Retail: $29.99
You Save 25%!

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FiltersFast 1" Air Filters MERV 8 Replacement for Nordic Pure MERV 8 6-Pack
(FFM8 6pk ND)

Take advantage of the savings and breathe better with the FiltersFast 1" Air Filters MERV 8 With Pleats 6-Pack.


In Stock! Ships in 5 to 6 business days.
FiltersFast 1" Air Filters MERV 8 Replacement for Nordic Pure MERV 8 6-Pack
Our Price: $50.95
Retail: $61.99
You Save 18%!

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Filtrete Home Odor Furnace Air Filter- 20 x 20 x 1
(Filtrete-Odor-20201)

The Filtrete Home Odor Furnace Air Filter- 20 x 20 x 1 features activated carbon technology along with electrostatically charged fibers to provide high performance air filtration in your home. This Filtrete air filter can remove common odors such as


Out of stock
Filtrete Home Odor Furnace Air Filter- 20 x 20 x 1
Our Price: $22.61
Retail: $29.99
You Save 25%!

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Honeywell FC40R1144 Return Air Filter - 20x24
(FC40R1144)

The Honeywell FC40R1144 Return Air Filter - 20x24 is a replacement air filter that mounts in most return filter grilles. The Honeywell return air grille filter features four inches of depth, which provides a higher efficiency than standard one inch


In stock! Ships in 1 business day.
Honeywell FC40R1144 Return Air Filter - 20x24
Our Price: $51.25
Retail: $69.99
You Save 27%!

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Filtrete Deep 1500-2 Replacement 4" Air Filter 2-Pack
(Deep 1500-2)

The Filtrete Deep 1500-2 Replacement 4" Air Filter comes with greater depth for improved airflow and more effective containment reduction.


Special Order. Ships in 14 days.
Filtrete Deep 1500-2 Replacement 4" Air Filter
Our Price: $95.94

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Lennox Y6616 PCO3-14-16 PureAir Annual Maintenance Kit 612988-03
(Y6616)

Lennox Y6616 PCO3-14-16 PureAir Annual Maintenance Kit 612988-03 has everything you need for your annual service.

Free shipping within the continental United States!

In Stock! Ships in 2 to 3 business days.
Lennox Y6616 PCO3-14-16 PureAir Annual Maintenance Kit 612988-03
Our Price: $166.95
Retail: $195.99
You Save 15%!

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FiltersFast 1" Air Filters MERV 8 Replacement for Aerostar Air Filters 6-Pack
(FFM8 6pk AS)

The FiltersFast 1" Air Filters MERV 8 With Pleats 6-Pack is the compatible replacement for the Aerostar Air Filters MERV 8 1" Air Filter.


In Stock! Ships in 5 to 6 business days.
FiltersFast 1" Air Filters MERV 8 Replacement for Aerostar Air Filters 6-Pack
Our Price: $50.95
Retail: $59.99
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GeneralAire 6FM2020 MERV 11 Replacement For GeneralAire 5FM2020
(4531)

The General Aire 5FM2020 MERV10 Media Cartridge measures 20"x20"x5", and is used on GeneralAire MAC 2020 Series and TRION AirBear Supreme 20x20 Systems. This General Aire filter will reduce airborne particulates to provide healthier indoor air.


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GeneralAire 6FM2020 MERV 11 Replacement For GeneralAire 5FM2020
Our Price: $36.95
Retail: $49.99
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Lennox X8347 MERV 16 Filter Maintenance Kit for PCO-12C
(X8347)

The Lennox X8347 MERV 16 Filter Maintenance Kit for PCO-12C is the correct replacement for the following air cleaner: Lennox PureAir Healthy Climate PCO-12C Air Purification System

Free shipping within the continental United States!

In Stock! Ships in 3 to 4 business days.
Lennox X8347 MERV 16 Filter Maintenance Kit for PCO-12C
Our Price: $250.95
Retail: $326.99
You Save 23%!

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GeneralAire 4366 Replacement for GeneralAire 4352 - GA100A29
(4352)

The General Aire GA100A29 16x25 MERV10 Filter Media is the correct replacement filter for Honeywell F100 Series and Honeywell F150 Series Media Style Air Cleaners. These filters remove airborne particles to 1.0 micron to provide healthier indoor air.


In stock! Ships in 1 business day.
GeneralAire 4366 Replacement for GeneralAire 4352 - GA100A29
Our Price: $38.99
Retail: $44.99
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FiltersFast FFC16205HONM8 Replacement for Honeywell FC100A1003 MERV8, 16x20x5 - 2-Pack
(FFC16205HONM8)

The FiltersFast FFC16205HONM8 compatible air filter replaces the Honeywell FC100A1003 and utilizes an extra deep pleated media for greater filtration capacities.


In Stock! Ships in 2 to 3 business days.
FiltersFast FFC16205HONM8 Replacement for Honeywell FC100A1003 MERV8, 16x20x5 - 2-Pack
Our Price: $41.95
Retail: $49.99
You Save 16%!

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Carrier 324897-761 Humidifier Water Filter Pad
(Carrier 324897-761)

The Carrier 324897-761 Humidifier Water Filter Pad is a replacement humidifier water filter pad for several models of humidifiers from Carrier, Bryant, Totaline, and Day and Night. This Carrier wick filter utilizes honeycomb filtration to trap miner


In stock! Ships in 1 business day.
Carrier 324897-761 Humidifier Water Filter Pad
Our Price: $25.95
Retail: $29.99
You Save 13%!

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FiltersFast HAPF30 R Replacement for Holmes HAPF30D
(HAPF30D)

The Holmes HAPF30D compatible single Replacement HEPA Filter removes up to 99% of airborne dust and pollen, in addition to reducing pet dander, smoke and mold spores.


Out of stock
FiltersFast HAPF30 R Replacement for Holmes HAPF30D
Our Price: $17.24
Retail: $29.99
You Save 43%!

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Lennox X2678 HEPA 20 Charcoal Carbon Filter
(X2678)

The Lennox X2678 HEPA 20 Charcoal Carbon Filter is a replacement charcoal carbon filter for the Lennox Healthy Climate HEPA 20 Bypass Filtration Unit. This is an inner filter used in the third stage of filtration for the removal of odors


In Stock! Ships in 3 to 4 business days.
Lennox X2678 HEPA 20 Charcoal Carbon Filter
Our Price: $39.00
Retail: $44.99
You Save 13%!

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Filters Fast - Air Filters

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