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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:


3M Filtrete Home Odor Furnace Filter - 18 x 24 x 1
(Filtrete-Odor-18241)

The 3M Filtrete Home Odor Furnace Filter - 18 x 24 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, a


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3M Filtrete Home Odor Furnace Filter - 18 x 24 x 1
Our Price: $30.99
Retail: $39.99
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Lennox 72H09 EAC-2000 Carbon Filter Replacement
(72H09)

The Lennox 72H09 EAC-2000 Carbon Filter Replacement is a replacement carbon air filter for the Lennox EAC-20 and EAC-2000 air cleaners. This charcoal filter is an genuine Lennox part and is made from high quality construction material.


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Lennox 72H09 EAC-2000 Carbon Filter Replacement
Our Price: $81.82
Retail: $111.99
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BestAir D19-C Replacement for Honeywell HC-818 Humidifier Filter
(Honeywell HC-818 R)

The BestAir D19-C Humidifier Wick Filter works with your Honeywell Cool Moisture Humidifier and features an antimicrobial agent for extra protection.


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BestAir D19-C Replacement for Honeywell HC-818 Humidifier Filter
Our Price: $11.45
Retail: $16.99
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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: $18.99
Retail: $21.99
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BestAir A35WPR Replacement For Space-Gard #35
(Space-Gard 35 R)

The Space-Gard #35 Humidifier Water Panel Evaporator Space-Gard/Aprilaire furnace humidifier replacement unit comes with honeycomb filtration. The evaporator pad should be replaced once every 6 months or more often in hard water areas.


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BestAir A35WPR Replacement For Space-Gard #35
As Low As: $12.45
Retail: $15.99
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Honeywell F300E1035 20x25 Electronic Air Cleaner
(F300E1035)

The Honeywell F300E1035 20x25 Electronic Air Cleaner operates with all gas, oil and electric forced warm air furnaces and air conditioning systems.

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Special Order. Ships in 7 days.
Honeywell F300E1035 20x25 Electronic Air Cleaner
Our Price: $642.99
Retail: $755.99
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Lennox X0582 MERV 11 Air Cleaner Media Filter 5-Pack
(X0582)

The Lennox X0582 MERV 10 Air Cleaner Media Filter is a furnace filter media that contains a MERV 10 air filter. This MERV 10 furnace filter is also known as the Lennox X0582 and measures 16x20x5 inches.


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Lennox X0582 MERV 11 Air Cleaner Media Filter
Our Price: $150.00

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FiltersFast 14ALL Replacement For Bemis 1104 Air Purifier Carbon PreFilter
(Bemis 1104 R)

The Bemis 1104 Air Purifier Carbon PreFilter is for use in your Bemis series Air Purifier. This carbon prefilter will help remove large particles and odors from your air. Another benefit of this prefilter is that it extends the life of your HEPA fil


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FiltersFast 14ALL Replacement For Bemis 1104 Air Purifier Carbon PreFilter
As Low As: $10.95
Retail: $19.99
You Save 45%!

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Holmes HAPF41 Air Purifier Carbon Prefilter 2-Pack
(ROHAPF41M)

The Holmes HAPF41 Air Purifier Carbon PreFilter-2 Pack is a replacement pack of carbon pre-filters for the Holmes HAP-300 and Holmes HAP-3004 air purifiers. This two pack of carbon filters protects the HEPA filter of your Holmes air cleaner and prev


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Holmes HAPF41 Air Purifier Carbon Prefilter
Our Price: $19.96

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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: $222.50

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Lennox X8346 PureAir PCO-12C MERV 16 Maintenance Kit 17x26x4
(X8346)

The Lennox X8346 PureAir PCO-12C MERV 16 Maintenance Kit 17x26x4 is the correct upgrade for the following whole-house purification system: Lennox PureAir PCO 12C.

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Lennox X8346 PureAir PCO-12C MERV 16 Maintenance Kit 17x26x4
Our Price: $153.95
Retail: $214.99
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Carrier 49BB680044 Humidifier Filter Replacement
(49BB680044)

The Carrier 49BB680044 is the correct replacement for the following humidifiers: Carrier 49BB001/910A Whole House Humidifiers Carrier 49BH/912A-912B Whole House Humidifiers Bryant Whole House Humidifiers


Special Order. Ships in 17 days.
Carrier 49BB680044 Humidifier Filter Replacement
Our Price: $57.99
Retail: $69.99
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BestAir R14ALLM Replacement For Kenmore 83237 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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BestAir R14ALLM Replacement For Kenmore 83237 2-Pack
Our Price: $18.99
Retail: $21.99
You Save 14%!

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Totaline DTLP102-2025 20x25 MERV 11 Filter
(DTLP102-2025)

The Totaline DTLP102-2025 20x25 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 DTLP102-2025 20x25 MERV 11 Filter
Our Price: $42.99
Retail: $49.99
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BestAir A10WPR Replacement for Lennox WB2-12 Humidifier Filter
(Lennox WB2-12 1R)

The BestAir A10WPR Humidifier Paper Water Panel Filter has approximate dimensions of 9 1/2 x 10 x 1 1/2 and fits the Lennox WB2-12 model of humidifier.


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BestAir A10WPR Replacement for Lennox WB2-12 Humidifier Filter
Our Price: $16.99
Retail: $19.99
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Honeywell HF100F1625 16x25x4 Replacement for Honeywell F100F2002
(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.

Free shipping within the continental United States!

Special Order. Ships in 8 days.
Honeywell  HF100F1625 16x25x4 Replacement for Honeywell F100F2002
Our Price: $107.99
Retail: $149.99
You Save 28%!

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FiltersFast A10PR R Replacement for BDP P110-0007
(BDP P110-0007 R)

The FiltersFast A10PR R is the correct replacement for the BDP P110-0007 R and for the following humidifier models:


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FiltersFast A10PR R Replacement for BDP P110-0007
As Low As: $7.99
Retail: $12.99
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FiltersFast A10PR R Replacement for BDP HUMBBSBP2312-A
(BDP HUMBBSBP2312-A R)

The FiltersFast A10PR R is the correct replacement filter for the BDP HUMBBSBP2312-A R and for the following humidifier models:


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FiltersFast A10PR R Replacement for BDP HUMBBSBP2312-A
As Low As: $7.99
Retail: $12.99
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FiltersFast A10PR R Replacement for Bryant P110-0007
(Bryant P110-0007 R)

The Bryant P110-0007 Humidifier Water Panel Filter is the nucleus of your humidifier, keeping you comfortable and balanced in your home. The Bryant filter is made of durable material, ensuring longevity.


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FiltersFast A10PR R Replacement for Bryant P110-0007
As Low As: $7.99
Retail: $12.99
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FiltersFast A10PR R Replacement for Carrier P110-0007
(Carrier P110-0007 R)

The Carrier P110-0007 is the compatible replacement for the following humidifiers: Carrier HUMBBxxx, Carrier HUMBBSBP221-A, Carrier, Carrier P110-200 and Carrier Stainless Steel SBP2212 Humidifiers.


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FiltersFast A10PR R Replacement for Carrier P110-0007
As Low As: $7.99
Retail: $12.99
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FiltersFast A10PR R Replacement for Payne P110-0007
(Payne P110-0007 R)

The FiltersFast A10PR R is the correct replacement for the Payne P110-0007 Humidifier Water Panel Filter and for the following models of Payne humidifiers:


In stock! Ships in 1 business day.
FiltersFast A10PR R Replacement for Payne P110-0007
As Low As: $7.99
Retail: $12.99
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FiltersFast A10PR R Replacement For Payne HUMBBSBP2312-A
(P HUMBBSBP2312-A R)

The FiltersFast A10PR R is the correct replacement for the Payne HUMBBSBP2312-A Water Panel Filter and for the following models of humidifiers:


In stock! Ships in 1 business day.
FiltersFast A10PR R Replacement For Payne HUMBBSBP2312-A
As Low As: $7.99
Retail: $12.99
You Save 38%!

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BestAir A10WPR Replacement for Carrier HUMBBSBP2312-A
(C HUMBBSBP2312-A 1R)

The BestAir A10WPR Paper Water Panel Filter has approximate dimensions of 9 1/2 x 10 x 1 1/2, and is the correct compatible replacement for the Carrier HUMBBSBP2312-A and Carrier HUMCCSBP2312-A models of humidifiers.


In stock! Ships in 1 business day.
BestAir A10WPR Replacement for Carrier HUMBBSBP2312-A
Our Price: $16.99
Retail: $19.99
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BestAir D11-C Replacement for Honeywell HC-811 Humidifier Filter
(Honeywell HC-811 R)

The BestAir D11-C humidifier wick filter will remove minerals and pollutants from the water, preventing them from being released into your homes air.


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BestAir D11-C Replacement for Honeywell HC-811 Humidifier Filter
Our Price: $8.99
Retail: $9.99
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BestAir HM2PR Replacement for Carrier P110-0006 Humidifier Filter
(7098 5 R)

This BestAir Filter features honeycomb filtration to trap mineral pollutants found in water and help prevent them from entering your home.


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BestAir HM2PR Replacement for Carrier P110-0006 Humidifier Filter
Our Price: $9.01
Retail: $9.99
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