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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.

Routine maintenance is a critical part of caring for your home. One area that should not be overlooked is replacing your home’s furnace filters on a regular basis following the manufacturers recommended guidelines. By doing this, you will help prolong the life of your system, as well as help eliminate indoor air contaminates.

Air filters help rid your home of a variety of air pollutants including smog, smoke, pollen, bacteria, pet dander, mold spores, dust, dust mites, debris and virus carrying particles. The MERV rating on furnace filters can help guide you in this area. The higher the rating, the more efficient the air filter will be at eliminating indoor contaminates.

Filtrete, Trion, 3M and Honeywell all manufacture high quality filters in a variety of sizes to meet all of your air filtration needs.


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Furnace Filters product list


Filtrete Custom Size Air Filter 6-Pack
(Custom Filtrete)

Can't find the size air filter you need? We can now provide custom size air filters to fit your needs! Custom sizes available in the Ultra Allergen Series and are subject to requirements. To view these requirements please click view details...

Free shipping within the continental United States!

Discontinued Product Read Description.
Filtrete Custom Size Air Filter 6-Pack
Our Price: $186.81
Retail: $196.15
You Save 5%!

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Filtrete Advanced Allergen (Deep Blue) 6-pack
(Advanced Allergen 6pack)

The Advanced Allergen Air Filter is the newest, most advanced high-performance filter from Filtrete. No Competitor's #1 Filter Performs Better! It even out performs the Filtrete Ultra Allergen--previously the #1 Performance Filter on the Market.

Free shipping within the continental United States!

Discontinued Product Read Description.
Filtrete Advanced Allergen (Deep Blue) 6-pack
Our Price: $110.00
Retail: $126.00
You Save 13%!

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Filtrete Advanced Allergen Air Filter (Deep Blue)
(Advanced Allergen)

The Advanced Allergen Air Filter is the newest, most advanced high-performance filter from Filtrete. No Competitor's #1 Filter Performs Better! It even out performs the Filtrete Ultra Allergen--previously the #1 Performance Filter on the Market.


Discontinued Product Read Description.
Filtrete Advanced Allergen Air Filter (Deep Blue)
Our Price: $18.99
Retail: $21.00
You Save 10%!

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Universal Room Air Conditioner Filter
(AC1)

There are many indoor air culprits that affect allergy sufferers. The Universal Room Air Conditioner Filter is designed to remove harmful airborne allergens such as pollen, mold spores, bacteria, dust mites and pet dander.


Discontinued Product Read Description.
Universal Room Air Conditioner Filter
Our Price: $5.99
Retail: $12.99
You Save 54%!

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Electrostatic Throw Away Filter 15X25 (cut to fit)
(EAC2)

The Electrostatic Throw Away Filter is a cut-to-fit HEPA air filter that is designed to eliminate unpleasant odors.


Discontinued Product Read Description.
Electrostatic Throw Away Filter 15X25 (cut to fit)
Our Price: $4.99
Retail: $6.99
You Save 29%!

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Baby's Room Vent Filter Kit
(VC-B)

The BestAir Baby's Room Vent Filter is a large 12" x 14" cut-to-fit, electrostatic and carbon filter that helps to reduce airborne pollutants such as pollen, dust, dirt, bacteria, mold spores, pet dander and hair.


Discontinued Product Read Description.
Baby's Room Vent Filter Kit
Our Price: $5.99
Retail: $7.99
You Save 25%!

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BestAir Family Room/Bedroom Vent Filter Kit
(VC-F)

The BestAir Family Room/Bedroom Vent Filter Kit is an easy to install, cut-to-fit filter designed to reduce airborne pollutants like dust, pet dander, dirt, pollen, hair and other allergens.


Discontinued Product Read Description.
BestAir Family Room/Bedroom Vent Filter Kit
Our Price: $5.99
Retail: $7.99
You Save 25%!

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Bestair All Rooms Vent Filter Kit
(VC-A)

The BestAir All Rooms Vent Filter Kit has a great prefilter for furnace and air cleaners to reduce airborne particles and pollutants such as pet dander, dust, pollen, dirt, hair and other fibers.


Discontinued Product Read Description.
Bestair All Rooms Vent Filter Kit
Our Price: $5.99
Retail: $7.99
You Save 25%!

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GeneralAire FP1625X5 MERV 8 AC Filter Media
(4527)

The GeneralAire FP1625X5 MERV 8 AC Filter Media is a replacement air filter that fits the MAC1400 air cleaner. The GeneralAire FP1625X5 filter improves your indoor air quality by reducing particulates like dust, dander, allergens, and pollen through


Discontinued Product Read Description.
GeneralAire FP1625X5 MERV 8 AC Filter Media
Our Price: $19.99
Retail: $29.99
You Save 33%!

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Trane 21x23.5x5 Perfect Fit BAYFTAH23M Filter 2pk
(FFC23205TRNM8)

For an economical compatible version of the genuine OEM Trane BAYFTAH23M 21x23.5x5 Perfect Fit Filter, try this MERV 8 Trane 21x23.5x5 Perfect Fit BAYFTAH23M replacement filter.


Discontinued Product Read Description.
Trane 21x23.5x5 Perfect Fit BAYFTAH23M Filter 2pk
Our Price: $50.00
Retail: $70.00
You Save 29%!

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French Scents Air Filter Freshener Mountain Breeze
(42068)

The French Scents Air Filter Freshener (42068 Mountain Breeze scent) is a whole home air freshener packet that is easily attached to any air filter to provide scented air throughout your entire home, business, or other indoor area. This French Sc


Discontinued Product Read Description.
French Scents Air Filter Freshener Mountain Breeze
Our Price: $1.99
Retail: $3.99
You Save 50%!

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French Scents Air Filter Freshener - Fresh Berries
(86118)

The French Scents Air Filter Freshener (86118 Fresh Berries scent) is a whole home air freshener packet that is easily attached to any air filter to provide scented air throughout your entire home, business, or other indoor area. This French Scen


Discontinued Product Read Description.
French Scents Air Filter Freshener - Fresh Berries
Our Price: $3.99
Retail: $4.99
You Save 20%!

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French Scents Air Filter Freshener - Marine Scent
(86195)

The French Scents Air Filter Freshener (86195 Marine Scent) is a whole home air freshener packet that is easily attached to any air filter to provide scented air throughout your entire home, business, or other indoor area.


Discontinued Product Read Description.
French Scents Air Filter Freshener - Marine Scent
Our Price: $2.99
Retail: $3.99
You Save 25%!

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French Scents Air Filter Freshener - Cinnamon
(85897)

The French Scents Air Filter Freshener (85897 Cinnamon scent) is a whole home air freshener packet that is easily attached to any air filter to provide scented air throughout your entire home, business, or other indoor area. This French Scents wh


Discontinued Product Read Description.
French Scents Air Filter Freshener - Cinnamon
Our Price: $2.99
Retail: $3.99
You Save 25%!

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French Scents Air Filter Freshener Gardenia Scent
(86193)

The French Scents Air Filter Freshener (86193 Gardenia Scent) is a whole home air freshener packet that is easily attached to any air filter to provide scented air throughout your entire home, business, or other indoor area. This French Scents wh


Discontinued Product Read Description.
French Scents Air Filter Freshener Gardenia Scent
Our Price: $2.99
Retail: $3.99
You Save 25%!

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French Scents Air Filter Freshener French Vanilla
(85914)

The French Scents Air Filter Freshener (85914 French Vanilla Scent) is a whole home air freshener packet that is easily attached to any air filter to provide scented air throughout your entire home, business, or other indoor area. This French Sce


Discontinued Product Read Description.
French Scents Air Filter Freshener French Vanilla
Our Price: $2.99
Retail: $3.99
You Save 25%!

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French Scents Air Filter Freshener - Tropical Bay
(43044)

The French Scents Air Filter Freshener (43044 Tropical Bay Scent) is a whole home air freshener packet that is easily attached to any air filter to provide scented air throughout your entire home, business, or other indoor area.


Discontinued Product Read Description.
French Scents Air Filter Freshener - Tropical Bay
Our Price: $2.49
Retail: $3.99
You Save 38%!

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French Scents Air Filter Freshener - Pine Woods
(86230)

The French Scents Air Filter Freshener (86230 Pine Woods Scent) is a whole home air freshener packet that is easily attached to any air filter to provide scented air throughout your entire home, business, or other indoor area.


Discontinued Product Read Description.
French Scents Air Filter Freshener - Pine Woods
Our Price: $2.99
Retail: $3.99
You Save 25%!

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French Scents Air Filter Freshener Country Cotton
(286042)

The French Scents Air Filter Freshener (286042 Country Cotton Scent) is a whole home air freshener packet that is easily attached to any air filter to provide scented air throughout your entire home, business, or other indoor area.


Discontinued Product Read Description.
French Scents Air Filter Freshener Country Cotton
Our Price: $3.99
Retail: $4.99
You Save 20%!

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Filters Fast - Furnace 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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