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Air Filter Shield

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:


Filtrete Dust & Pollen Furnace Filter (Green)
(Dust and Pollen)

The Filtrete Dust & Pollen Furnace Filter is the right choice if you're looking for an economical upgrade from cheap 1 month furnace filters. The Filtrete "Blue Filter" features electrostatically charged fibers and is ideal for high-velocity..


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Filtrete Dust & Pollen Furnace Filter (Green)
Our Price: $11.99
Retail: $14.99
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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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Bionaire 611D Replacement For Bionaire 611DCS Compatible Dual Air Filter
(611DCS)

The Bionaire 611DCS dual air filter cartridge is for use with your Bionaire model air purifier. This dual air purifier filter inclueds both a main and carbon filter for better air filtration. The carbon and air filter work together to remove harmful


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Bionaire 611D Replacement For Bionaire 611DCS Compatible Dual Air Filter
Our Price: $11.99
Retail: $14.99
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Aprilaire 1200 Commercial Humidifier Filter Pad Water Panel
(Aprilaire 1200)

This is an Aprilaire 1200 Humidifier Filter Pad Water Panel for various Aprilaire commercial humidifiers including the Aprilaire 1120 Humidifier, Aprilaire 1130 humidifier, and the Aprilaire 1140 humidifer. The Aprilaire water panel evaporator is th


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Aprilaire 1200 Commercial Humidifier Filter Pad Water Panel
Our Price: $62.95
Retail: $90.60
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Aprilaire 4510 Replacement Air Filter-1700, 1710A
(4510)

The Aprilaire 4510 is the correct replacement for the following dehumidifier: Aprilaire 1700 Dehumidifier


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Aprilaire 4510 Replacement Air Filter-1700, 1710A
Our Price: $32.95
Retail: $39.99
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Honeywell Replacement HEPA Filter, 23500
(23500)

The Honeywell 23500 Replacement HEPA Filter fits Honeywell Enviracaire Air Purifiers models 13530, 13531, 13532, 13533 (300i), 50200, 50201, and 52000 and Sears Kenmore models 83165 and 83331. Genuine Honeywell part.


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Honeywell Replacement HEPA Filter, 23500
Our Price: $61.25
Retail: $64.99
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Honeywell HC-24 Humidifier Filter Replacement
(Honeywell HC-24 R)

The Honeywell HC-24 Humidifier Filter Replacement is a J replacement humidifier filter for the Holmes Tabletop Cool Mist Humidifier models. This evaporator pad is antimicrobially treated for the removal of pollutants from water and prevents the grow


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Honeywell HC-24 Humidifier Filter Replacement
As Low As: $15.99
Retail: $25.95
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GeneralAire 4556 MERV 11 Replacement For GeneralAire 4531
(4531)

The General Aire 5FM2020 MERV10 Media Cartridge measures 20"x20"x5", and is used on GeneralAire MAC 2020 Series and TRION AirBear Supreme 20x20 Systems. This General Aire filter will reduce airborne particulates to provide healthier indoor air.


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GeneralAire 4556 MERV 11 Replacement For GeneralAire 4531
Our Price: $35.95
Retail: $49.99
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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: $36.00
Retail: $37.00
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FiltersFast 1" MERV 11 Replacement For Honeywell 14x14x1 MERV 11 6-Pack
(50049536-003)

The Honeywell 14x14x1 MERV 11 Air Filter- TruDRY DR90 is a replacement filter for the Honeywell TrueDry DR90 Dehumidification System. This Honeywell air filter measures 14" x 14" x 1" and has a MERV 11 rating for the reduction of airborne contaminan


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FiltersFast 1" MERV 11 Replacement For Honeywell 14x14x1 MERV 11 6-Pack
Our Price: $53.50

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FiltersFast Brand Trane 21x23x5 Perfect Fit BAYFTAH23M
(FFC21235TRNM13)

The FiltersFast Brand Trane 21x23x5 Perfect Fit BAYFTAH23M is a compatible version of the genuine Trane Perfect fit 21x23x5 Air Filter.

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FiltersFast Brand Trane 21x23x5 Perfect Fit BAYFTAH23M
Our Price: $90.95
Retail: $140.00
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Trion Air Bear Supreme Filter 20x20x5 MERV11
(259112-103)

The Trion Air Bear Supreme Filter 20x20x5 MERV11 is an Air Bear filter with a MERV 11 rating and built-in frame strength. This genuine Air Bear filter boasts pre-applied gasketing on the pre-assembled filter in order to prevent air bypass. The MERV


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Trion Air Bear Supreme Filter 20x20x5 MERV11
Our Price: $47.99
Retail: $49.99
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Trion 255649-101 Air Bear Media AC Filter 16x25x3 6-Pack
(255649-101 6pack)

The Trion Air Bear 255649-101 AC Filter Media is a genuine Trion Air Bear pleated media filter. The 255649-101 can be used in Trion models Air Bear TM and Air Bear Cub. Replaces 229990-101 and 229990-001 as an upgrade.

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Trion 255649-101 Air Bear Media AC Filter 16x25x3 6-Pack
Our Price: $100.95
Retail: $132.00
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Filtrete Home Odor Furnace Air Filter- 20 x 20 x 1
(Filtrete-Odor-20201)

The Filtrete Home Odor Furnace Air Filter- 20 x 20 x 1 features activated carbon technology along with electrostatically charged fibers to provide high performance air filtration in your home. This Filtrete air filter can remove common odors such as


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Filtrete Home Odor Furnace Air Filter- 20 x 20 x 1
Our Price: $21.61
Retail: $29.99
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Lennox 92X09 Healthy Climate 93014-21 HEPA 40-60 Carbon Filter
(92X09)

This Lennox Healthy Climate Filter offers efficient air-filtration performance. This Lennox HEPA 60 carbon filter should be replaced every 2-5 years.


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Lennox 92X09 Healthy Climate 93014-21 HEPA 40-60 Carbon Filter
Our Price: $47.95
Retail: $48.25
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Lennox X6669 PCO-20C 21X26X4 Merv 16 Filter Replacement
(X6669)

The Lennox X6669 PCO-20C 21X26X4 Merv 16 Filter Replacement is a pleated box filter for your Pureair air cleaner. This air filter box measures 21x26x4 inches and is a pleated air filter.

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Lennox X6669 PCO-20C 21X26X4 Merv 16 Filter Replacement
Our Price: $98.95
Retail: $149.99
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GeneralAire F1020 MERV 13 Filter Media Replacement
(4562)

The General Air F1020 MERV 13 Filter Media measures 20"x25"x4" (approx.), and is correct filter for General Aire TERSus2000 Air Purification Systems.


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GeneralAire F1020 MERV 13 Filter Media Replacement
Our Price: $63.91
Retail: $69.99
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Lennox Y6616 PCO3-14-16 PureAir Annual Maintenance Kit 612988-03
(Y6616)

Lennox Y6616 PCO3-14-16 PureAir Annual Maintenance Kit 612988-03 has everything you need for your annual service.

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Lennox Y6616 PCO3-14-16 PureAir Annual Maintenance Kit 612988-03
Our Price: $165.95
Retail: $178.54
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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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Honeywell Trane Perfect Fit 26x21x5 BAYFTAH26M 3-Pack
(HTRN2621T1)

These 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 filters

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Honeywell Trane Perfect Fit 26x21x5 BAYFTAH26M 3-Pack
Our Price: $141.50
Retail: $150.00
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BestAir R14ALLM Replacement For Kenmore 83156 2-Pack
(KENMORE 83156 1 R)

The Kenmore 83156 Carbon PreFilter 2 Pack works with your Kenmore 83250 and 85250 model Air Purifier. These replacement carbon prefilters measure approximately 14.5" x 11" inches and will protect your HEPA filter while removing harmful particles and


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BestAir R14ALLM Replacement For Kenmore 83156 2-Pack
Our Price: $17.99
Retail: $19.99
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Honeywell 209989 Air Cleaner Pre-Filter - 16x20 2-Pack
(209989)

The Honeywell 209989 Air Cleaner Pre-Filter - 16x20 includes two 16" x 10" pre-filters for Honeywell 16" x 20" air cleaner models. This Honeywell pre-filter trap larger particulates in your air to extend the life of your air filter. This air cleaner


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Honeywell 209989 Air Cleaner Pre-Filter - 16x20
Our Price: $65.20

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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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Honeywell FC40R1037 12x24 Return Air Grille Filter
(FC40R1037)

The Honeywell FC40R1037 Return Aire Grille Filter is a high efficiency, replacement for return grille applications. Designed to capture airborne particles that circulate through the filter. Nominal Dimension 12x24x4. Genuine Honeywell Part.


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Honeywell FC40R1037 12x24 Return Air Grille Filter
Our Price: $41.50
Retail: $45.00
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GeneralAire 4365 Comp For General Aire 16x20 MERV10 Filter
(4350)

The GeneralAire GA100A03 16x20 MERV10 Filter Media is used on Honeywell F25 Series, F35 Series, F100 Series & F150 Series Media Style Air Cleaners, as well as Honeywell FC100A1003, F100F1004, F100B1008, F100F2028, and F150E1000 Air Cleaners.


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GeneralAire 4365 Comp For General Aire 16x20 MERV10 Filter
Our Price: $34.99

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Filters Fast - Air Filters

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