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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 92X10 40/60 HEPA Filter Replacement
(92X10)

This Lennox Charcoal Carbon Filter 92X10 is designed to capture 99.97% of particulates down to 0.3 micron that pass through it. The Lennox Healthy Climate filter should be replaced every 2-5 years.

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Lennox 92X10 40/60 HEPA Filter Replacement
Our Price: $260.99
Retail: $284.96
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GeneralAire FP2025X5 MERV 8 AC Filter Media
(4526)

The GeneralAire FP2025X5 MERV 8 AC Filter Media is a flatpac expandable replacement filter with a MERV 8 rating. This expandable, high capacity, depth loading fiberglass filter that allows for reduced and efficient storage.


In Stock! Ships in 10 to 11 business days.
GeneralAire FP2025X5 MERV 8 AC Filter Media
Our Price: $20.99
Retail: $29.99
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Trion Air Bear Right Angle Air Cleaner Merv 11
(447380-510)

The 447380-510 is the correct air cleaner that uses: 5" thick electrostatically charged pleated filter media.

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In Stock! Ships in 18 to 19 business days.
Trion Air Bear Right Angle Air Cleaner Merv 11
Our Price: $130.99
Retail: $149.99
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FC40R1830 18x30 Honeywell Return Grille AC Filter 5-Pack
(FC40R1830)

The Honeywell FC40R1830 18x30 Return Air Grille Filter is a high efficiency, replacement air filter for return grille applications. Honeywell replacement furnace filters capture airborne particles that circulate through the furnace filter.


Special Order. Ships in 10 days.
FC40R1830 18x30 Honeywell Return Grille AC Filter
Our Price: $212.50

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Hunter 30965 QuietFlo HEPA Purifier Filter 3-Pack
(30965)

The Hunter 30965 QuietFlo HEPA Purifier Filter is an electrostatically-charged filter that captures 99.9% of particles as small as 0.1 microns. This is a true HEPA filter and a genuine OEM Hunter part.


Special Order. Ships in 4 days.
Hunter 30965 QuietFlo HEPA Purifier Filter
Our Price: $107.97

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Trion 1000-3000-0101 Replacement Air Filter 2-Pack
(1000-3000-0101)

The Trion 1000-3000-0101 Replacement Air Filter 2-Pack is a replacement air filter for the Trion CAC500 and CAC500 air cleaners. This CAC500M filter features pleated media to trap contaminants and improve overall indoor air quality. This Trion filte

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In Stock! Ships in 14 to 15 business days.
Trion 1000-3000-0101 Replacement Air Filter 2-Pack
Our Price: $216.67
Retail: $299.99
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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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Out of stock
Lennox 75X73 Metal Mesh Filter
Our Price: $165.99
Retail: $189.95
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RPS R14ALLM Replacement For Kaz Premium Carbon PreFilter 2-Pack
(KAZ PREMIUM 1 R)

The Kaz Premium Carbon PreFilter 2-Pack is a replacement pack of pre-filters for the Kaza HEPAClean and HEPA Compact Tower model air purifiers. This two pack of carbon filters helps your HEPA filter reach maximum efficiency and reduces unwanted odor


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RPS R14ALLM Replacement For Kaz Premium Carbon PreFilter 2-Pack
Our Price: $16.99
Retail: $19.99
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RPS R14ALLM Replacement For GE P00633 Carbon PreFilter 2-Pack
(GE P00633 1 R)

The GE P00633 Carbon PreFilter 2-Pack is a carbon pre-filter that fits the GE 106633 model air cleaner. This carbon filter for air cleaners measures approximately 15.5" x 20.5" x 0.25" and traps large airborne particulates.


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RPS R14ALLM Replacement For GE P00633 Carbon PreFilter 2-Pack
Our Price: $16.99
Retail: $19.99
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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


Special Order. Ships in 7 days.
Lennox X2678 HEPA 20 Charcoal Carbon Filter
Our Price: $37.00
Retail: $40.28
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Honeywell F100F2051 25x22 Whole Home Air Purifier
(F100F2051)

The Honeywell F100F2051 25x22 Air Purifier System is applicable to all gas, oil and electric forced air furnaces and to compressor cooling up to 5 tons.


In Stock! Ships in 10 to 11 business days.
Honeywell F100F2051 25x22 Whole Home Air Purifier
Our Price: $99.99

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Holmes HAPF92 Comp Carbon Odor Pre-Filter 2-Pack
(HAPF92)

The Holmes HAPF92CS Carbon Odor Pre-Filter 2-pack fits the Holmes Air Purifier model HAP292. It extends the life of your air purifier's HEPA filter (Holmes model HAPF38CS) by trapping over 4000 chemicals and eliminates odors.


In Stock! Ships in 1 to 2 business days.
Holmes HAPF92 Comp Carbon Odor Pre-Filter 2-Pack
Our Price: $13.98
Retail: $19.99
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Lennox X8313 MERV 16 Expandable Filter Replacement
(X8313)

The Lennox X8313 MERV 16 Expandable Filter Replacement is the correct replacement for any furnace the needs a 20x25x5 filter. This expandable filter has a MERV rating of 16. The Lennox X8313 MERV 16 Expandable Filter Replacement specifica

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Special Order. Ships in 7 days.
Lennox X8313 MERV 16 Expandable Filter Replacement
Our Price: $108.55
Retail: $131.25
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Trion Duct Mount HE Plus 2000, 455600-001
(455600-001)

The Trion Duct Mount HE Plus 2000, 455600-001 is an Electronic Whole House Air Purification System. The HE Plus 2000 includes an elctronic air flow sensor. This is a genuine Trion product. Learn how the HE Plus 2000 can help you...

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In Stock! Ships in 24 to 25 business days.
Trion Duct Mount HE Plus 2000, 455600-001
Our Price: $393.99
Retail: $420.00
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FiltersFast Brand Trane 24x26x5 Perfect Fit BAYFTFR24M
(FFC24265TRNM13)

FiltersFast Brand Trane 24x26x5 Perfect Fit BAYFTFR24M

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In Stock! Ships in 2 to 3 business days.
FiltersFast Brand Trane 24x26x5 Perfect Fit BAYFTFR24M
Our Price: $79.95
Retail: $140.00
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Hunter 30925 HEPAtech Purifier Filter 6-Pack
(30925)

The Hunter 30925 HEPAtech v Filter is an electrostatically-charged filter that captures 99.9% of particles as small as 0.1 microns.


Special Order. Ships in 5 days.
Hunter 30925 HEPAtech Purifier Filter
Our Price: $144.00

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American Metal Filter RCP0907 Replacement For GE WB2X8293
(RCP0907)

The GE WB2X8293 Compatible Range Hood Filter measures 9" x 10 1/2" x 3/8" (measure your old filter to ensure a perfect fit). This carbon range hood filter is a compatible replacement for the GE WB2X8293 and is not washable. This charcoal filter opti


In Stock! Ships in 7 to 8 business days.
American Metal Filter RCP0907 Replacement For GE WB2X8293
Our Price: $6.09
Retail: $9.99
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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 15 days.
Carrier FILCCCAR0024 Air Purifier Filter 2-Pack
Our Price: $141.76

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Honeywell Trane Perfect Fit Filter 21x27x5 BAYFTFR21M 3-Pack
(HTRN2127T1)

These three Honeywell air filters are compatible furnace filters that can be used as upgrades over the Trane Perfect Fit filter of the same size. Genuine Trane Perfect Fit filters have only a MERV 8 rating, while these compatible Honeywell furnace f

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Special Order. Ships in 15 days.
Honeywell Trane Perfect Fit Filter 21x27x5 BAYFTFR21M
Our Price: $151.50

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Austin Air HM405 Allergy Machine - Midnight Blue
(HM405 MB)

The Austin Air HM405 Allergy Machine - Midnight Blue is an air cleaner that provides clean air for allergy and asthma sufferers. This Austin Air purifier offers users better sleep and less coughing & sneezing through the reduction of smoke, mold, mi

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In Stock! Ships in 2 to 3 business days.
Austin Air HM405 Allergy Machine - Midnight Blue
Our Price: $574.99
Retail: $599.99
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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 1 to 2 business days.
Trion Air Bear 20x25x5 Comp. Supreme 2000 Filter
Our Price: $79.96

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Holmes HAPF92 Air Purifier Carbon PreFilter 2-Pack
(ROHAPF92M)

The Holmes HAPF92 Air Purifier Carbon PreFilter-2 Pack fits the Holmes HAP292 model air purifier. This carbon prefilter features Microban technology with anti microbial and anti bacterial filter protection. The Holmes HAPF92 Air Purifier Carbon P


In Stock! Ships in 1 to 2 business days.
Holmes HAPF92 Air Purifier Carbon PreFilter
Our Price: $13.98

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RPS R14ALLM Replacement For 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.
RPS R14ALLM Replacement For Shop-Vac 8017062 Carbon PreFilter 2-Pack
Our Price: $16.99
Retail: $19.99
You Save 15%!

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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
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Filters Fast - Air Filters

" I just received my filters - thank you for the excellent work that you guys do! I'm a very happy customer. " - Mike, San Marcos, TX
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