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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.

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Air Filters product list


BlueAir 20x20x1 High Efficiency Air Filter Kit
(BCST2020)

The BlueAir 20x20x1 High Efficiency Air Filter Kit includes two replacement air filters, the MX2 Particle Charger, and an Automated Filter Check Timer. This BlueAir filter kit converts your existing central air system into a high efficiency air puri

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Special Order. Ships in 12 days.
BlueAir 20x20x1 High Efficiency Air Filter Kit
Our Price: $149.95
Retail: $199.99
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BlueAir 20x25x1 High Efficiency Air-Furnace Filter
(BCST2025)

The BlueAir 20x25x1 High Efficiency Air-Furnace Filter is a BlueAir filter kit that includes two replacement air filters, the MX2 Particle Charger, and an Automated Filter Check Timer that will convert your existing central air system into a high ef

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BlueAir 20x25x1 High Efficiency Air-Furnace Filter
Our Price: $149.95
Retail: $199.99
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BlueAir 14x20x1 High Efficiency Air Filter Kit
(BCST1420)

The BlueAir BCST1420 contains the following: (2) 14 x 20 x 1 filters MX2 particle charger Automated filter check timer The BlueAir 14x20x1 High Efficiency Air Filter Kit turns your air conditioning or heating system into a sophisticated, hig

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Special Order. Ships in 4 days.
BlueAir 14x20x1 High Efficiency Air Filter Kit
Our Price: $149.95
Retail: $199.99
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GeneralAire F1016 MERV 11 Filter Media Cartridge
(4561)

The General Aire F1016 MERV 11 Filter Media Cartridge is the replacement part for the General Air TERSus2000 System. This GeneralAir Filter reduces airborne particles as small as 0.3 micron in order to improve indoor air quality dramatically.


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GeneralAire F1016 MERV 11 Filter Media Cartridge
Our Price: $49.99
Retail: $59.99
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General Aire Important Label EACGM-19
(GeneralAire 4793)

The General Aire Important Label EACGM-19 is a replacement Important Label for the GeneralAire Model GA52F32 Grill Mount Air Cleaner. The GeneralAire EACGM-19 Important Label is an optional component of your GA52F32 air cleaner and is an OEM replace


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General Aire Important Label EACGM-19
Our Price: $13.97
Retail: $19.99
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General Aire Air Cleaner Prefilter G8-0885
(4783)

The General Aire Air Cleaner Prefilter G8-0885 is a replacement air filter for the GeneralAire GA52F32 Grill Mount Air Cleaner. The G8-0885 prefilter captures large airborne particles within your home and sends the smaller particles to the main air


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General Aire Air Cleaner Prefilter G8-0885
Our Price: $29.99
Retail: $39.99
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Zander 2010XP Filter Replacement Element
(2010XP)

The Zander 2010XP Filter Element Replacement is a coalescent filter for your air compressor filter. This Zander filter works with your G9 Air Compressor housing. This air compressor filter features a stainless steel expanded metal support with plast

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Zander 2010XP Filter Replacement Element
Our Price: $175.15
Retail: $200.16
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Lennox 72H09 EAC-2000 Carbon Filter Replacement
(72H09)

The Lennox 72H09 EAC-2000 Carbon Filter Replacement is a replacement carbon air filter for the Lennox EAC-20 and EAC-2000 air cleaners. This charcoal filter is an genuine Lennox part and is made from high quality construction material.


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Lennox 72H09 EAC-2000 Carbon Filter Replacement
Our Price: $78.82
Retail: $111.40
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Lennox 72H03 Air Cleaner Filter Cell
(72H03)

This Lennox 72H03 Air Cleaner Filter Cell is a high quality filter cell that provides effective air filtration. The Lennox 72H03 Air Cleaner Filter Cell is a Genuine Lennox replacement filter for central air cleaners.

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Lennox 72H03 Air Cleaner Filter Cell
Our Price: $328.40
Retail: $349.99
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Lennox 75X73 Metal Mesh Filter
(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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Lennox 75X73 Metal Mesh Filter
Our Price: $164.99
Retail: $189.95
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Lennox 91X23 MERV 8 Pleated Air Filters 4-Pack
(91X23)

The Lennox 91X23 is a furnace and air conditioning filter that reduces the following allergens: Dust Pollen Mold spores


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Lennox 91X23 MERV 8 Pleated Air Filters 4-Pack
Our Price: $29.95
Retail: $38.95
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Lennox 91X24 MERV 8 Pleated Air Filters 4-Pack
(91X24)

The Lennox 91X24 MERV 8 Pleated Air Filters 4-Pack is a set of pleated air filters that measures approximately 15x20x1 and has an a MERV 8 rating. This air conditioner filter arrives in a convenient 4 pack, which will last up to one year.


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Lennox 91X24 MERV 8 Pleated Air Filters 4-Pack
Our Price: $29.95
Retail: $38.95
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Lennox 91X25 MERV 8 Pleated Air Filters 4-Pack
(91X25)

The Lennox 91X25 MERV 8 Pleated Air Filters 4-Pack is a replacement set of pleated air filters that arrives in a 4 pack. These Healthy Climate furnace filters boast a MERV 8 rating, which can reduce mold spores, dust, and tiny particles from your ai


Special Order. Ships in 10 days.
Lennox 91X25 MERV 8 Pleated Air Filters 4-Pack
Our Price: $29.95
Retail: $38.95
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Lennox 69H98 Air Cleaner Carbon Filter
(69H98)

The Lennox 69H98 Air Cleaner Carbon Filter is a replacement air filter for the Lennox EAC12-14 and EAC-14 series air cleaners. This carbon filter replaces part number 69H9801 and is a genuine Lennox part that is constructed from high quality materia


Special Order. Ships in 3 days.
Lennox 69H98 Air Cleaner Carbon Filter
Our Price: $74.99
Retail: $79.99
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GeneralAire DC4E Elite Dehumidistat Control
(4685)

The GeneralAire DC4E is the correct replacement for the following ventilators: GeneralAire Heat Recovery Ventilators and GeneralAire Energy Recovery Ventilators.

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Special Order. Ships in 9 days.
GeneralAire DC4E Elite Dehumidistat Control
Our Price: $200.69
Retail: $249.99
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GeneralAire 201-12880 MERV 11 Filter Media
(4050)

The GeneralAire 201-12880 is a compatible replacement for the following air cleaners: Aprilaire 2200 Air Cleaner Aprilaire 2250 Air Cleaner


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GeneralAire 201-12880 MERV 11 Filter Media
Our Price: $47.99
Retail: $59.99
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Lennox X8347 MERV 16 Filter Upgrade Kit
(X8347)

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

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Lennox X8347 MERV 16 Filter Upgrade Kit
Our Price: $325.99
Retail: $326.95
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Lennox X7751 HCC20-28 Replacement Filter Cabinet
(X7751)

The Lennox X7751 replacement Healthy Climate Cabinet is used in air conditioning systems to provide whole house filtration. The metal construction provides durability for year round home comfort with little maintenance. The unit is not powered for r

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Lennox X7751 HCC20-28 Replacement Filter Cabinet
Our Price: $299.95
Retail: $349.99
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Lennox X8344 MERV 16 Filter Upgrade Kit
(X8344)

The Lennox X8344 MERV 16 Filter Upgrade Kit is an upgrade kit for the Lennox PCO-20C Healthy Climate PureAir Air Purification System. This Lennox PureAir filter kit includes one MERV 16 filter, also known by part number X6669, and six UV bulbs.

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Lennox X8344 MERV 16 Filter Upgrade Kit
Our Price: $273.27
Retail: $299.99
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Lennox 98N46 MERV 8 Pleated Furnace Filter
(98N46)

This Lennox 98N46 MERV 8 Pleated Furnace Filters 4-Pack serves as an excellent choice to upgrade from the generic fiberglass filters in your local hardware store. The healthy climate filters come in this money-saving 4-pack package.


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Lennox 98N46 MERV 8 Pleated Furnace Filter
Our Price: $7.49
Retail: $9.99
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GeneralAire GA102 MERV 8 Filter Media Cartridge
(4122)

The GeneralAire ventilator filter is rated Merv 8. This ventilator filter cartridge is a genuine GeneralAire part and is also called a GA102.


Discontinued Product Read Description.
GeneralAire GA102 MERV 8 Filter Media Cartridge
Our Price: $29.99

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GeneralAire GA104 MERV 8 Filter Media Cartridge
(4123)

The GeneralAire GA104 MERV 8 Filter Media Cartridge is a replacement air filter for the GeneralAire AC24 and Aprilaire 2140 air cleaner models. This replacement filter media cartridge features a MERV 8 rating for reducing airborne contaminants and p


Discontinued Product Read Description.
GeneralAire GA104 MERV 8 Filter Media Cartridge
Our Price: $19.99
Retail: $29.99
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Holmes HAPF94CS Carbon Odor Filter for HAP575
(HAPF94CS)

The Holmes HAPF94CS Carbon Odor Filter for HAP575 is a replacement carbon filter for the Holmes HAP575 HEPA Air Purifier. This carbon odor filter measures approximately 18 1/4" x 11 1/4" and reduces impurities and particulates from air. In addition,


Discontinued Product Read Description.
Holmes HAPF94CS Carbon Odor Filter for HAP575
Our Price: $14.99
Retail: $19.99
You Save 25%!

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GeneralAire FP1625HW MERV 8 AC Filter Media
(4362)

The GeneralAire FP1625HW MERV 8 AC Filter Media is a replacement air filter for the Honeywell F100F2002 and F100F1012 model air cleaners. The GeneralAire FP1625HW filter media replaces the Honeywell FC100A1029 and features a MERV 8 rating for captur


Discontinued Product Read Description.
GeneralAire FP1625HW MERV 8 AC Filter Media
Our Price: $19.99
Retail: $29.99
You Save 33%!

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GeneralAire FP1625X5 MERV 8 AC Filter Media
(4527)

The GeneralAire FP1625X5 MERV 8 AC Filter Media is a replacement air filter that fits the MAC1400 air cleaner. The GeneralAire FP1625X5 filter improves your indoor air quality by reducing particulates like dust, dander, allergens, and pollen through


Discontinued Product Read Description.
GeneralAire FP1625X5 MERV 8 AC Filter Media
Our Price: $19.99
Retail: $29.99
You Save 33%!

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