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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 full product list:


Honeywell 10590 HEPA Filter Replacement
(Honeywell 10590 R)

The Honeywell 10590 HEPA Filter Replacement is a replacement air filter for use with several Honeywell and Duracraft air cleaner models. This HEPA filter measures approximately 10 7/8" OD x 6 1/4" ID x 4" H and removes up to 99.97% of airborne parti


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Honeywell 10590 HEPA Filter Replacement
Our Price: $30.99
Retail: $50.95
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Lennox Y2920 Whole House Air Filter Cabinet
(Y2920)

The Lennox Y2920 Whole House Air Filter Cabinet is the correct system that is: Compatible with any HVAC system and does not require an additional power source

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Lennox Y2920 Whole House Air Filter Cabinet
Our Price: $93.75
Retail: $119.00
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Honeywell HC-818 Humidifier Wick Filter
(Honeywell HC-818 R)

The Honeywell HC-818 Humidifier Wick Filter 3-Pack works with your Honeywell Cool Moisture Humidifier and features an antimicrobial agent for extra protection. These filters measure approximately 8" x 9" x 1 3/4" inches. Each box contains three filt


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Honeywell HC-818 Humidifier Wick Filter
Our Price: $10.45
Retail: $16.99
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Lennox X8312 MERV 16 Expandable Filter Replacement
(X8312)

The Lennox X8312 MERV 16 furnace filter is an expandable filter for your furnace system. Also known as the HCXF16-16, this pleated air filter will protect both your family and HVAC system. This MERV 16 rated filter will capture very small particles.

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Lennox X8312 MERV 16 Expandable Filter Replacement
Our Price: $110.16
Retail: $124.81
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Honeywell HAC-506 Humidifier Filters 2-Pack
(D13-C)

Humidifier filter removes mineral and pollutants from water. The Honeywell HAC-506 compatible humidifier filters comes in a convenient 2-Pack and fits select humidifier models including Duracraft.


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Honeywell HAC-506 Humidifier Filters 2-Pack
Our Price: $11.99
Retail: $12.99
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Free Flow Room Air Conditioner Filter - 15" x 24"
(93524)

This Free Flow Room Air Conditioner Filter (1777) is a universal 15" x 24" cut to fit black foam room air conditioner filter. It filters dirt, dust, soot, pollen, and other allergens.


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Free Flow Room Air Conditioner Filter - 15" x 24"
Our Price: $10.99
Retail: $15.99
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Filtrete Home Odor Air Filter- 14 x 20 x 1
(Filtrete-Odor-14201)

The Filtrete Home Odor Air Filter- 14 x 20 x 1 effectively removes common odors in your home while also trapping airborne contaminants. This odor filter is constructed with activated carbon to remove odors like pet, smoke, cooking, mildew, and clean


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Filtrete Home Odor Air Filter- 14 x 20 x 1
Our Price: $21.61
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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 F825-0549 MERV13 2Pack
(FFC20265WRM13)

The FiltersFast Brand White Rodgers F825-0549 MERV13 2Pack is a compatible alternative that's a part of the White Rodgers F825 Series residential air cleaner replacement filters.


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FiltersFast Brand White Rodgers F825-0549 MERV13 2Pack
Our Price: $81.00
Retail: $100.00
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Honeywell F100F2010 20x25 Media Air Cleaner
(F100F2010)

The Honeywell F100F2010 20x25 Media Air Cleaner uses a 4-inch extended media that makes replacement quick and easy.

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Honeywell F100F2010 20x25 Media Air Cleaner
Our Price: $100.86
Retail: $104.99
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FiltersFast 16x25x5 MERV 11 Air Filter 2-Pack
(FFC16255HON OKGM)

The FiltersFast 16x25x5 MERV 11 Air Filter 3-Pack is a replacement pack of compatible air filters that is an upgrade the Honeywell FC100A1029 and Carrier FILCCCAR0016 air filters. This 3 pack of 16" x 25" x 5" filters features a MERV 8 rating and


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FiltersFast 16x25x5 MERV 11 Air Filter 2-Pack
Our Price: $53.95
Retail: $94.99
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Trion Herrmidifier 1220 Humidifier Filter
(7098 11 R)

The Trion Herrmidifier 1220 Humidifier Filter Replacement is a replacement humidifier filter for the Herrmidifier Model 465-C1 and Herrmidifier 465-1. This filter is very dependable and reliable.


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Trion Herrmidifier 1220 Humidifier Filter
Our Price: $8.01
Retail: $9.99
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Lennox Y6608 PCO3-20-16 Air Filter Maintenance Kit
(DLXY6608)

The Lennox Y6608 PCO3-20-16 PCO3-20-16 Air Filter Maintenance Kit includes the following:

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Lennox Y6608 PCO3-20-16 Air Filter Maintenance Kit
Our Price: $167.54
Retail: $178.54
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Carrier 356066-0602 Pre Filter for EACBAXCC0014
(356066-0602)

The Carrier 356066-0602 Pre Filter is a genuine OEM factory replacement pre filter for compatible Carrier air cleaners and Bryant air cleaners, especially the Carrier EACBAXCC0014 Electronic Air Cleaner.


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Carrier 356066-0602 Pre Filter for EACBAXCC0014
Our Price: $34.95
Retail: $39.95
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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: $166.99
Retail: $189.95
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Honeywell F100F2002 16x25 Whole House Air Cleaner
(F100F2002)

The Honeywell F100F2002 16x25 Whole House Air Cleaner uses a high efficiency filter that captures airborne particles in the air circulated through the unit, as small as 0.3 microns.

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Honeywell F100F2002 16x25 Whole House Air Cleaner
Our Price: $115.59

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FiltersFast Trane 21x27x5 Perfect Fit BAYFTFR21M M13 x2
(FFC21275TRNM13)

FiltersFast Brand Trane 21x27x5 Perfect Fit BAYFTFR21M M13 x2 is an economical compatible version of the genuine Trane 21x27x5 Perfect Fit Air Filter.

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FiltersFast Trane 21x27x5 Perfect Fit BAYFTFR21M M13 x2
Our Price: $111.00
Retail: $140.00
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Trion Trim T / Trim TX Air Cleaner Prefilter
(123324-008)

The Trion Trim T / Trim TX Air Cleaner Prefilter is an aluminum prefilter for electronic air cleaners. Trion Trim T electronic air cleaners are whole house air cleaners built for air duct system. Electricity is utilized to attract and capture dust,


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Trion Trim T / Trim TX Air Cleaner Prefilter
Our Price: $22.99
Retail: $29.99
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American Metal OEMRCP0205 Replacement For LG 5230W2A003C
(5230W2A003C)

The LG 5230W2A003C Comp. Microwave Charcoal Filter, made by the American Metal Filter Company, is a compatible replacement for the LG 5230W2A003C, LG 5230W2A003A, and GE WB02X10943 activated charcoal filters. This microwave grease filter reduces kit


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American Metal OEMRCP0205 Replacement For LG 5230W2A003C
Our Price: $4.99

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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.


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FC40R1830 18x30 Honeywell Return Grille AC Filter
Our Price: $217.50

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Holmes HAPF92 Comp Carbon Odor Pre-Filter 2-Pack 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.


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Holmes HAPF92 Comp Carbon Odor Pre-Filter 2-Pack
Our Price: $15.98

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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: $41.99
Retail: $49.99
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Trion Air Bear Supreme 2000 Air Cleaner Merv 11
(455602-525)

The Trion Air Bear Supreme 2000 Air Cleaner Merv 11 is a whole house air cleaner that filters various airborne particles. With this Trion Air Bear cleaner you will be able to capture and hold pollutants from the air inside the filter, which will all

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Trion Air Bear Supreme 2000 Air Cleaner Merv 11
Our Price: $90.95
Retail: $199.99
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BestAir R14ALLM Replacement For Kenmore 83134 2-Pack
(KENMORE 83134 1 R)

The Kenmore 83134 Carbon PreFilter comes in this money-saving 2-pack package. The Kenmore Carbon PreFilter should be replaced every 2 to 3 months for optimum performance.


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BestAir R14ALLM Replacement For Kenmore 83134 2-Pack
Our Price: $17.99
Retail: $19.99
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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.


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Honeywell FC40R1052 16x20 Return Air Grille Filter
Our Price: $259.95

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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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