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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?

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


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: $14.97
Retail: $19.99
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GeneralAire FP12020X5 MERV 8 AC Filter Media 12-Pack
(4528)

The GeneralAire FP12020X5 MERV 8 AC Filter Media fits all furnaces or air conditioners that require the following size filter: 20" x 20" x 5" This GeneralAire FP12020x5 filter media is rated MERV 8. The GeneralAire FP12020X5 MERV 8 AC Filte


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GeneralAire FP12020X5 MERV 8 AC Filter Media
Our Price: $251.88

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GeneralAire Air Cleaner Prefilter R2-0855
(4782)

The GeneralAire Air Cleaner Prefilter R2-0855 is the correct replacement prefilter for the following model of air cleaner: GeneralAire GA50A22 This GeneralAire air cleaner prefilter measures 20" x 10 1/2". The GeneralAire R2-0855 is also known


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GeneralAire Air Cleaner Prefilter R2-0855
Our Price: $30.99
Retail: $39.99
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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: $30.99
Retail: $39.99
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General Aire Air Cleaner On/Off Switch C5-0223
(4787)

The General Aire Air Cleaner On/Off Switch C5-0223 fits the following model of air cleaner: GeneralAire GA52F32 This GeneralAire air cleaner switch is the air cleaner's on/off switch. The GeneralAire air cleaner on/off switch C5-0223 is also k


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General Aire Air Cleaner On/Off Switch C5-0223
Our Price: $30.99
Retail: $39.99
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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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GeneralAire DC4E Elite Dehumidistat Control
Our Price: $201.69
Retail: $249.99
You Save 19%!

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GeneralAire TR3 Ventilator Timer Control
(4690)

The GeneralAire TR3 Ventilator Timer Control is a replacement push button timer for all GeneralAire HRV and ERV model recovery ventilators. The TR3 timer allows the user change the humidity level of the HRV and ERV units, as well as override control


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GeneralAire TR3 Ventilator Timer Control
Our Price: $35.99
Retail: $39.99
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GeneralAire 100328 Ventilator Filter Replacement
(4663)

The GeneralAire filter pads are for use on your GeneralAire Venitlator. This ventilator filter media will keep your unit running at its best. The 100328 filter media is a genuine OEM part from the manufacturer. These ventilator filter pads will comp


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GeneralAire 100328 Ventilator Filter Replacement
Our Price: $40.99
Retail: $49.99
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GeneralAire 100329 Ventilator Filter Replacement
(4667)

The GeneralAire 100329 Ventilator Filter Replacement is the correct replacement for the following models of energy/heat recovery ventilators: ERV3220 HRV8220 Energy/heat recovery ventilators bring fresh outdoor air into your home while gettin


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GeneralAire 100329 Ventilator Filter Replacement
Our Price: $50.99
Retail: $69.99
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Duracraft ACA-1010 Air Cleaner Filter Replacement
(ACA-1010 R)

The Duracraft ACA-1010 Air Cleaner Filter Replacement is a HEPA filter which is 99.97% effective at removing dust, dirt, pollen, fibers, pet hair and dander, mold and spores as small as 0.3 microns.


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Duracraft ACA-1010 Air Cleaner Filter Replacement
Our Price: $19.99
Retail: $24.39
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Lennox X8346 MERV 16 Filter Upgrade Kit
(X8346)

The Lennox X8346 MERV 16 Filter Upgrade Kit is the correct upgrade for the following whole-house purification system: Lennox PureAir PCO 12C This Lennox upgrade kit contains 4 PureAir UV-A lamps, and 1 PureAir MERV 16 filter. This upgrade kit

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Lennox X8346 MERV 16 Filter Upgrade Kit
Our Price: $189.19
Retail: $215.00
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Lennox X8314 MERV 16 Expandable Filter Replacement
(X8314)

The Lennox X8314 is the correct replacement for the following air cleaner: Lennox PMAC-20C Healthy Climate Air Cleaner

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Lennox X8314 MERV 16 Expandable Filter Replacement
Our Price: $110.20
Retail: $114.99
You Save 4%!

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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: $274.27
Retail: $299.99
You Save 9%!

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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: $300.95
Retail: $349.99
You Save 14%!

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Lennox X6661 Healthy Climate Filter Cabinet
(X6661)

The Lennox X6661 Healthy Climate Filter Cabinet is a replacement filter cabinet for Lennox Healthy Climate air cleaner models HC10 and HC 16. This air filter cabinet measures approximately 20x25x5 and is also known as the HCC20-28.

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Lennox X6661 Healthy Climate Filter Cabinet
Our Price: $100.75
Retail: $120.95
You Save 17%!

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Lennox X6666 MERV 16 Pleated Air Filter Media 5-Pack
(X6666)

This Lennox Box Filter is a genuine MERV 16 filter. The Lennox Furnace Filter Box should only be replaced every six months.

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Lennox X6666 MERV 16 Pleated Air Filter Media
Our Price: $504.75

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Lennox X8303 MERV 10 Expandable Filter Kit
(X8303)

The Lennox X8303 MERV 10 Expandable Filter Kit is the correct replacement for several models of the following brands of air cleaners: Bryant & Carrier Honeywell Lennox Trion This Lennox Healthy Climate filter kit contains one filter and


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Lennox X8303 MERV 10 Expandable Filter Kit
Our Price: $48.50
Retail: $49.99
You Save 3%!

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Lennox X8304 MERV 10 Expandable Filter Kit
(X8304)

This Lennox Expandable Filter is a genuine Lennox part. The Lennox Healthy Climate Filter is a viable replacement for several Air Cleaner Models.

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Special Order. Ships in 6 days.
Lennox X8304 MERV 10 Expandable Filter Kit
Our Price: $100.99
Retail: $104.99
You Save 4%!

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Lennox X8305 MERV 10 Expandable Filter Kit
(X8305)

The Lennox X8305 MERV 10 Expandable Filter Kit is a filter kit that includes a replacement expandable furnace filter and a replacement inner housing reusable filter frame. This expandable filter measures approximately 20x20x5.


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Lennox X8305 MERV 10 Expandable Filter Kit
Our Price: $99.99

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Lennox X8306 MERV 16 Expandable Filter Kit
(X8306)

The Lennox X8306 expandable filter is a MERV 16 furnace filter for your home. This Lennox healthy climate filter measures 16x25x5 inches.

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Special Order. Ships in 7 days.
Lennox X8306 MERV 16 Expandable Filter Kit
Our Price: $141.00
Retail: $169.99
You Save 17%!

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Lennox X8307 MERV 16 Expandable Filter Kit
(X8307)

The Lennox X8307 MERV 16 Expandable Filter Kit is the correct replacement for several models of the following brands of air cleaners: Bryant & Carrier Honeywell Lennox Trion This Lennox Healthy Climate filter kit contains one filter and one

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Lennox X8307 MERV 16 Expandable Filter Kit
Our Price: $136.00
Retail: $169.99
You Save 20%!

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Lennox X8308 MERV 16 Expandable Filter Kit
(X8308)

This Lennox Expandable Filter is a genuine Lennox part. The Lennox Healthy Climate Filter is a viable replacement for several Air Cleaner Models.

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Lennox X8308 MERV 16 Expandable Filter Kit
Our Price: $130.99
Retail: $149.99
You Save 13%!

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Aprilaire Space Gard 2400 Compat 16x27x6 AC Filter 12-Pack 12-Pack
(FC2400A1005)

The Honeywell FC2400A1005 is a compatible AC filter for the Aprilaire and Space Gard 2400 (filter model 401) and is also used in Research Products cabinet models 2200, 2250 and 2400. This filter boasts a MERV 10 rating.


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Aprilaire Space Gard 2400 Compat 16x27x6 AC Filter 12-Pack
Our Price: $549.60

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Hunter 30938 QuietFlo HEPA Purifier Filter 3-Pack
(30938)

The Hunter 30938 QuietFlo HEPA Purifier Filter is an electrostatically-charged filter that captures 99.9% of particles as small as 0.3 microns.


Special Order. Ships in 3 days.
Hunter 30938 QuietFlo HEPA Purifier Filter
Our Price: $185.58

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Hunter 30960 QuietFlo HEPA Purifier Filter 3-Pack
(30960)

The Hunter 30960 QuietFlo HEPA Purifier Filter is an electrostatically-charged filter that captures 99.9% of particles as small as 0.3 microns.


Special Order. Ships in 8 days.
Hunter 30960 QuietFlo HEPA Purifier Filter
Our Price: $207.75

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Filters Fast - Air Filters

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