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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.


Air Filters full product list:


Bionaire A2001D Replacement Air Cleaner Filter
(A2001D R)

The Bionaire A2001D Replacement Air Cleaner Filter fits the following model of air cleaner: Bionaire SE2080 This Bionaire air purifier filter is a dual filter, with a pleated filter as well as a carbon filter. The Bionaire A2001D has approxima


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Bionaire A2001D Replacement Air Cleaner Filter
Our Price: $20.99
Retail: $29.99
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Trane Perfect Fit BAYFTFR21P4A Filter - 21x27x1
(BAYFTFR21P4A)

The Trane Perfect Fit BAYFTFR21P4A Filter - 21x27x1 fits several air cleaner models made by Trane. This Trane furnace filter measures approximately 21" x 27" x 1" and has pleats for the purification of your indoor air. This Trane Perfect Fit filter


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Trane Perfect Fit BAYFTFR21P4A Filter - 21x27x1
Our Price: $21.90

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Honeywell HAC-500 Humidifier Filter Pad
(Honeywell HAC-500 R)

The Honeywell HAC-500 Humidifier Filter Pad is a replacement humidifier filter for several Honeywell humidifier models. This evaporator pad measures approximately 7 7/8" x 8" x 1 3/4" and features honeycomb filtration to trap mineral pollutants foun


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Honeywell HAC-500 Humidifier Filter Pad
Our Price: $6.99
Retail: $9.99
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Honeywell 32000146-001 Humidifier Filter
(7098 13 R)

The Honeywell 32000146-001 Humidifier Filter is a replacement humdifier filter made for several Honeywell drum-type humidifier models. This Honeywell evaporator pad measures approximately 7.5" H x 26.5" L x 1" W and removes minerals from evaporating


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Honeywell 32000146-001 Humidifier Filter
Our Price: $8.01
Retail: $9.99
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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.


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Hunter 30936 QuietFlo HEPA Purifier Filter
Our Price: $58.95
Retail: $299.97
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FiltersFast 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


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FiltersFast A35WPR Replacement For Lennox WB2-17 WB2-18
As Low As: $11.45
Retail: $14.99
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Lennox X8348 PCO-20C MERV 10 Filter Maintenance Kit
(X8348)

The Lennox X8348 MERV 10 Filter Maintenance Kit is a maintenance kit for the Lennox PCO-20C PureAir Air Purification System. This PureAir maintenance kit includes: one MERV 10 filter, also known as part number X6667; one catalyst insert, also known

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Lennox X8348 PCO-20C MERV 10 Filter Maintenance Kit
Our Price: $228.95
Retail: $354.95
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BestAir R14ALLM Replacement For Kenmore 83157 2-Pack
(KENMORE 83157 1 R)

The Kenmore 83157 Carbon PreFilter 2-Pack is the correct replacement for: several Kenmore air cleaner models This carbon prefilter is a cut to fit sheet that measures 15 3/4" x 48". This Kenmore prefilter removes large particles and common hou


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BestAir R14ALLM Replacement For Kenmore 83157 2-Pack
Our Price: $17.99
Retail: $19.99
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American Metal OEMRCP0205 Replacement For GE WB02X10943
(OEMRCP0205)

This Microwave Filter Replacement (OEMRCP0205) made by American Metal Filter Company is a compatible replacement microwave filter primarily for the GE WB02X10943 filter. It is a recirculating charcoal carbon microwave filter for use with non-ducted


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American Metal OEMRCP0205 Replacement For GE WB02X10943
Our Price: $4.99

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Lennox Genuine Metal Mesh Insert 75X66 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

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Lennox Genuine Metal Mesh Insert 75X66 Fits PureAir Model PCO-2OC
Our Price: $99.95
Retail: $199.99
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GeneralAire 401-13156 MERV 11 Filter Media
(4051)

The GeneralAire Merv 11 ventilator filter replacement is designed for use in GeneralAire Air Cleaners. This part is often called a GeneralAire 401-13156. A suitable AC24 filter replacement, this Merv 11 replacement filter is expandable.


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GeneralAire 401-13156 MERV 11 Filter Media
Our Price: $52.85
Retail: $69.99
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FiltersFast FF 30915 Replacement for Hunter 30915
(30915)

The Hunter 30915 HEPAtech Purifier Filter is an electrostatically-charged filter that captures 99.97% of particles as small as 0.3 microns.


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FiltersFast FF 30915 Replacement for Hunter 30915
Our Price: $12.99
Retail: $16.99
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Honeywell Trane Perfect Fit 23.5x21x5 BAYFTAH23M 3-Pack
(HTRN2321T1)

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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Honeywell Trane Perfect Fit 23.5x21x5 BAYFTAH23M 3-Pack
Our Price: $149.00
Retail: $160.00
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FiltersFast 711D Replacement For Bionaire 711D Air Cleaner Filter
(711D R)

The Bionaire 711D Replacement Air Cleaner Filter is a replacement air filter for several Bionaire model air cleaners, including the F701 and 100 100. The Bionaire 711D features a dual filter cartridge.


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FiltersFast 711D Replacement For Bionaire 711D Air Cleaner Filter
Our Price: $11.95
Retail: $14.99
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FilterFast Trane 21.5x21x5 Perfect Fit BAYFTAH21M Merv 13 2 Pack
(FFC215215TRNM13)

The FilterFast Brand Trane 21.5x21x5 Perfect Fit Filter BAYFTAH21M, FLR06072, BAYFTAH21M2 is a compatible economical alternative for the genuine Trane 21.5x21x5 Perfect Fit Filter that comes in a 2-pack value set.


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FilterFast Trane 21.5x21x5 Perfect Fit BAYFTAH21M Merv 13 2 Pack
Our Price: $69.95
Retail: $140.00
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Honeywell FC200E1011 Media Filter 20x20x5- Merv 13
(FC200E1011)

The Honeywell FC200E1011 Media Filter 20x20x5- Merv 13 is a replacement air filter for the Honeywell 20X20 F100 and F200 media air cleaners. This Honeywell air filter boasts a MERV 13 rating and removes over 97% of 3 to 10 micron particles from indo


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Honeywell FC200E1011 Media Filter 20x20x5- Merv 13
Our Price: $46.99

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Honeywell 203369 Pre-Filter 12.5 x 20 x 11/32 2-Pack 2-Pack
(203369)

The Honeywell 203369 Pre-Filter 12.5x20x.375 2-Pack is a replacement pre-filter for the Honeywell model F50 and F300 air cleaners. This Honeywell air filter traps larger particles in your air to help improve your overall indoor air quality and incre


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Honeywell 203369 Pre-Filter 12.5 x 20 x 11/32 2-Pack
Our Price: $47.32

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Honeywell FC35A1035 Furnace/ AC Air Filter 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


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Honeywell FC35A1035 Furnace/ AC Air Filter 16x20x5
As Low As: $30.99
Retail: $49.99
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Lennox WB2-12 Humidifier Paper Water Panel Filter
(Lennox WB2-12 1R)

The Lennox WB2-12 Humidifier Paper Water Panel Filter is the correct compatible replacement for the following model of humidifier: Lennox WB2-12 This Lennox humidifier water panel has approximate dimensions of 9 1/2" x 10" x 1 1/2". This paper


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Lennox WB2-12 Humidifier Paper Water Panel Filter
Our Price: $15.99
Retail: $19.99
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FiltersFast Brand White Rodgers 16x26x5 F825-0548 2 Pack
(F825-0548-M8)

If you are looking for a FiltersFast Brand economical compatible alternative for the OEM White Rodgers 16x26x5 Air Furnace Filter try this White Rodgers 16x26x5 Furnace Filter Replacement F825-0548.


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FiltersFast Brand White Rodgers 16x26x5 F825-0548 2 Pack
Our Price: $34.95
Retail: $59.99
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General Aire 20x20 MERV 11 Filter Media GA100A11
(4354)

The General Air GA100A11 20x20 MERV 10 Filter Media is the replacement filter for Honeywell F25A, F35F, F100F & F200E Media Air Cleaners; Honeywell F100B2024, F100F1020, F100F2036 & F150E1018 Air Cleaners.


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General Aire 20x20 MERV 11 Filter Media GA100A11
Our Price: $38.99
Retail: $39.99
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GeneralAire 13415 MERV 11 Filter Media for AC4
(GA 4401)

The GeneralAire air cleaner filter replacement is manufactured for your AC4 furnace air cleaner. This air cleaner filter cartridge features a MERV 11 rating that will capture particulates down to 3 microns in size. This genuine GeneralAire product i


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GeneralAire 13415 MERV 11 Filter Media for AC4
Our Price: $31.99

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Filtrete Odor Reduction Air Filter - 14 x 24 x 1
(Filtrete-Odor-14241)

The Filtrete Odor Reduction Air Filter - 14 x 24 x 1 is constructed with activated carbon to remove common odors from your home, including pet, smoke, cooking, mildew, and cleaning chemicals. In addition to creating a more breathable atmosphere, thi


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Filtrete Odor Reduction Air Filter - 14 x 24 x 1
Our Price: $21.66
Retail: $179.99
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FiltersFast A10WPR Replacement For Carrier P1101045
(P110-1045)

The Carrier P110-1045 Paper Water Panel Filter measures 9-1/2" x 9-3/4" x 1-1/2" (approx.), and is the correct replacement filter for many humidifiers made by AprilAire, Bryant, Carrier, Chippewa, Hamilton, Honeywell, Lasko, Lennox and Totaline.


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FiltersFast A10WPR Replacement For Carrier P1101045
Our Price: $15.99
Retail: $19.99
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FiltersFast Replacement for Honeywell FC100A1011 - 20x20x5 2-Pack
(FFC20205HONM8)

FiltersFast Brand Honeywell 20x20x5 FC100A1011 2-Pack Air Filter is an economical compatible version of the OEM Honeywell FC100A1011 20"x20" Media AC Filter. To save money, this air filter replacement comes in a 2pk value set.


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FiltersFast Replacement for Honeywell FC100A1011 - 20x20x5 2-Pack
Our Price: $44.90
Retail: $50.00
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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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