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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


Lennox 91X25 MERV 8 Pleated Air Filters 4-Pack 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


In stock! Ships in 1 business day.
Lennox 91X25 MERV 8 Pleated Air Filters 4-Pack
Our Price: $43.93

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Trion Air Bear 20x25x5 Comp. Supreme 2000 Filter 2-Pack
(AB20258)

The AB20258 is the correct air filter replacement used in Trion Air Bear, Air Bear Classic, Air Bear Plus 2000 and Trion Air Bear Supreme 2000 Air Cleaners.


In Stock! Ships in 2 to 3 business days.
Trion Air Bear 20x25x5 Comp. Supreme 2000 Filter
Our Price: $79.96

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Carrier FILCCCAR0024 Air Purifier Filter 2-Pack 2-Pack
(FILCCCAR0024)

The Carrier FILCCCAR0024 Air Purifier Filter is a genuine OEM factory replacement air filter for Bryant, Carrier, Payne, Day-Night, as well as certain Honeywell, Space-Gard, and Trion air purifiers. It fits numerous units including model numbers FIL


Special Order. Ships in 7 days.
Carrier FILCCCAR0024 Air Purifier Filter 2-Pack
Our Price: $141.76

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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 8 to 9 business days.
Crane HS-1934 Replacement Air Purifier Filter Set
Our Price: $22.99
Retail: $24.99
You Save 8%!

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Crane Humidifier Cleaner and Descaler - 8 Ounces 6-Pack
(HS-1933)

This 8 ounce bottle of Crane Humidifier Cleaner and Descaler (HS-1933) is a liquid descaler and cleaner which removes lime, calcium, and similar types of mineral scale from humidifiers, evaporators, vaporizers, and other similar units. It also contr


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Crane Humidifier Cleaner and Descaler - 8 Ounces 6-Pack
Our Price: $109.08
Retail: $114.53
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Honeywell FC40R1185 Return Air Grille Filter 18x18 5-Pack
(FC40R1185)

The Honeywell FC40R1185 Return Air Grille Filter 18x18 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


In Stock! Ships in 14 to 15 business days.
Honeywell FC40R1185 Return Air Grille Filter 18x18
Our Price: $247.50

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Carrier 356066-1202 Charcoal Filter for EACBAXCC00 2-Pack
(356066-1202)

The Carrier 356066-1202 Charcoal Filter is a genuine OEM factory replacement charcoal carbon filter for compatible Carrier air cleaners and Bryant air cleaners, especially the Carrier EACBAXCC0014 Electronic Air Cleaner.


Special Order. Ships in 11 days.
Carrier 356066-1202 Charcoal Filter for EACBAXCC00
Our Price: $125.24

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Honeywell FC35A1001 Replacement Air Filter 16x25x5
(FC35A1001)

The Honeywell FC35A1001 is the correct replacement filter for the following air cleaners: Honeywell 16x25 F100 Media Air Cleaners Honeywell 16x25 F200 Media Air Cleaners The Honeywell FC35A1001 Replacement Air Filter 16x25x5 is a genuine Hone


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Honeywell FC35A1001 Replacement Air Filter 16x25x5
As Low As: $35.00
Retail: $37.00
You Save 5%!

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Totaline DTLP102-1620 16x20 MERV 11 Filter
(DTLP102-1620)

The Totaline DTLP102-1620 16x20 MERV 11 Filter features a filter material that is constructed of continuous hydrophobic polyolefin fibers that will not shred or absorb moisture.


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Totaline DTLP102-1620 16x20 MERV 11 Filter
Our Price: $36.45
Retail: $45.99
You Save 21%!

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Honeywell FC40R1052 16x20 Return Air Grille Filter 5-Pack
(FC40R1052)

The Honeywell FC40R1052 is a high-efficiency, replacement AC filter for return grille applications. Designed to capture airborne particles that circulate through the filter. Nominal Dimension 16x20x4. Genuine Honeywell Part.


In Stock! Ships in 7 to 8 business days.
Honeywell FC40R1052 16x20 Return Air Grille Filter
Our Price: $254.95

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3M OAC100RF Replacement Air Filter 6-Pack
(OAC100RF)

The 3M OAC100RF Replacement Air Filter is the replacement filter for the 3M Filtrete OAC100 Office Air Cleaner. This easy to change filter reduces airborne dust, pollen and particulates down to 0.01 microns.


Special Order. Ships in 23 days.
3M OAC100RF Replacement Air Filter 6-Pack
Our Price: $132.94
Retail: $162.00
You Save 18%!

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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

Free shipping within the continental United States!

Special Order. Ships in 10 days.
Lennox X8347 MERV 16 Filter Upgrade Kit
Our Price: $326.99

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Lennox X4137 HEPA 20 Carbon PreFilter Replacement
(X4137)

The Lennox X4137 HEPA 20 Carbon PreFilter Replacement is a replacement carbon pre-filter for the Lennox Healthy Climate HEPA 20 Filtration System. This carbon pre-filter is the first stage of the HEPA 20 filtration process.


Special Order. Ships in 6 days.
Lennox X4137 HEPA 20 Carbon PreFilter Replacement
Our Price: $37.67
Retail: $46.95
You Save 20%!

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Hunter 30962 QuietFlo HEPA Purifier Filter
(30962)

The Hunter 30962 QuietFlo HEPA Purifier Filter is an electrostatically-charged filter that captures 99.9% of particles as small as 0.3 microns. This is a true HEPA filter and a genuine OEM Hunter part.


Special Order. Ships in 10 days.
Hunter 30962 QuietFlo HEPA Purifier Filter
Our Price: $72.99
Retail: $85.00
You Save 14%!

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FiltersFast MERV 8 Trion Compatible Filter 2-Pack
(FFC16255TAB OKGM)

The Filters Fast MERV 8Trion Compatible Filter 3PACK is the correct replacement for the following: all Trion Air Bear cleaners requiring a 16" x 25" x 5" media filter cartridge This Filters Fast air filter has a MERV 8 rating. This means th


In Stock! Ships in 3 to 4 business days.
FiltersFast MERV 8 Trion Compatible Filter 2-Pack
Our Price: $55.00
Retail: $83.00
You Save 34%!

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Kenmore 83120 Carbon PreFilter 2-Pack
(KENMORE 83120 1 R)

The Kenmore 83120 Carbon PreFilter 2-Pack is the correct replacement for: several models of Kenmore air purifiers This carbon prefilter has a shipping weight of 3 lbs. This Kenmore prefilter 2-pack comes with 2 filters in each pack.


In stock! Ships in 1 business day.
Kenmore 83120 Carbon PreFilter 2-Pack
Our Price: $16.99
Retail: $19.99
You Save 15%!

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Kenmore 83176 Carbon PreFilter 2-Pack
(KENMORE 83176 1 R)

The Kenmore 83176 Carbon PreFilter comes in this cost-cutting 2-pack package. The Kenmore Carbon PreFilter should be replaced every 2 to 3 months for optimum performance.


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Kenmore 83176 Carbon PreFilter 2-Pack
Our Price: $16.99
Retail: $19.99
You Save 15%!

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Kenmore 83237 Carbon PreFilter 2-Pack
(KENMORE 83237 1 R)

The Kenmore 83237 is the correct replacement for the following air cleaners: Kenmore Air Cleaners


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Kenmore 83237 Carbon PreFilter 2-Pack
Our Price: $16.99
Retail: $19.99
You Save 15%!

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Kenmore PF155 Carbon PreFilter 2-Pack
(KENMORE PF155 1 R)

The Kenmore PF155 Carbon PreFilter 2-Pack is a replacement pack of carbon pre-filters that is compatible with the Honeywell 51000 model air purifier and several other models from Kenmore. This carbon filter measures approximately 34 3/4" x 7" x 1/16


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Kenmore PF155 Carbon PreFilter 2-Pack
Our Price: $16.99
Retail: $19.99
You Save 15%!

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Norelco CAF150 Carbon PreFilter 2-Pack
(NORELCO CAF150 1 R)

The Norelco CAF150 Carbon PreFilter 2-Pack is the correct replacement for the following models of Norelco air cleaners: CAS 1050 CAS 1051 CAS 2051 This carbon prefilter measures 7.28" x 2.36" x 9.45". This Norelco prefilter comes with two fi


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Norelco CAF150 Carbon PreFilter 2-Pack
Our Price: $16.99
Retail: $19.99
You Save 15%!

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Phillips CAF150 Carbon PreFilter 2-Pack
(PHILLIPS CAF150 1 R)

The Phillips CAF150 Carbon PreFilter features absorbent carbon that aids in reducing impurities, odors and air borne pollution. This Phillips CAF150 Carbon PreFilter 2-Pack should be replaced every 2-3 months depending upon air quality.


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Phillips CAF150 Carbon PreFilter 2-Pack
Our Price: $16.99
Retail: $19.99
You Save 15%!

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Pollenex FP1000 Carbon PreFilter 2-Pack
(POLLENEX FP1000 R)

The Pollenex FP1000 is the correct replacement for the following air cleaners: Pollenex Air Cleaners requiring a carbon pre-filter.


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Pollenex FP1000 Carbon PreFilter 2-Pack
Our Price: $16.99
Retail: $19.99
You Save 15%!

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Shop-Vac 8017062 Carbon PreFilter 2-Pack
(SHOP-VAC 8017062 1 R)

The Shop-Vac 8017062 Carbon PreFilter 2-Pack is a replacement two pack of carbon pre-filters for the Shop-Vac 1030000 air cleaner model. These carbon filters reduce airborne contaminants down to 5 microns and allows you to reduce dust and dirt from


In stock! Ships in 1 business day.
Shop-Vac 8017062 Carbon PreFilter 2-Pack
Our Price: $16.99
Retail: $19.99
You Save 15%!

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Sunbeam 6618 Carbon PreFilter 2-Pack
(SUNBEAM 6618 1 R)

The Sunbeam 6618 Carbon prefilter 2-pack works with your Sunbeam 2590 air purifier. This convenient two pack will keep noxious gases and large particulates out of your homes air. This will increase the life of your air purifiers HEPA filter.


In stock! Ships in 1 business day.
Sunbeam 6618 Carbon PreFilter 2-Pack
Our Price: $16.99
Retail: $19.99
You Save 15%!

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Sunbeam 6620 Carbon PreFilter 2-Pack
(SUNBEAM 6620 1 R)

The Sunbeam 6620 Carbon PreFilter 2-Pack is the correct replacement for the following model of Sunbeam air cleaner: 2590 This carbon prefilter measures 15 3/4" x 48". This Sunbeam prefilter removes large particles from indoor air, and reduces


In stock! Ships in 1 business day.
Sunbeam 6620 Carbon PreFilter 2-Pack
Our Price: $16.99
Retail: $19.99
You Save 15%!

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Filters Fast - Air Filters

" Thank you for your expert service when helping me get the proper filters for my old pool and filter system. The new ones are perfect and work very well. All the best! " - Jim, Alamo, CA
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