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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.


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Air Filters product list


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 611DCS Compatible Dual Air Filter
Our Price: $10.99
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Trane Perfect Fit Filter 21.5x21x5 BAYFTAH21M 3-Pk
(HTRN2121T1)

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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Trane Perfect Fit Filter 21.5x21x5 BAYFTAH21M 3-Pk
Our Price: $147.00
Retail: $150.00
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Hunter 30962 QuietFlo HEPA Purifier Filter
(30962)

The Hunter 30962 QuietFlo HEPA Purifier Filter is an electrostatically-charged filter that captures 99.9% of particles as small as 0.3 microns. This is a true HEPA filter and a genuine OEM Hunter part.


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Hunter 30962 QuietFlo HEPA Purifier Filter
Our Price: $71.99
Retail: $85.00
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Lennox Foam Humidifier Filter - Lennox LX18
(LX18)

The Lennox Foam Humidifier Filter LX18 is a replacement foam filter for the Lennox WSI-18 furnace mount humidifier. This two pack of Lennox foam prefilters measures 14" x 12 3/4" x 1/8" and reduces mineral pollutants within your WS1-18 humidifie


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Lennox Foam Humidifier Filter - Lennox LX18
Our Price: $37.98
Retail: $39.88
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Honeywell Comfort System Kit YTHX9421R5069
(YTHX9421R5069)

The Honeywell PRESTIGE IAQ 2.0 Comfort System Kit YTHX9421R5069 is a high definition touch screen thermostat for your home. This Honeywell comfort system thermostat can control up to 4 heat/2 cool heat pumps or 3 heat/2 cool conventional systems. Fo

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Honeywell Comfort System Kit YTHX9421R5069
Our Price: $317.99
Retail: $349.99
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General Aire White Cover Assembly C5-0608
(4708)

The General Aire White Cover Assembly C5-0608 fits the following models of air cleaners: GeneralAire SSCB15-WHT GeneralAire SSCB15W-R This GeneralAire part 4708 is the air cleaner's cover assembly and is white in color. The GeneralAire white

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General Aire White Cover Assembly C5-0608
Our Price: $662.13
Retail: $695.24
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General Aire Gray Cover Assembly C5-0609
(4709)

The General Aire Gray Cover Assembly C5-0609 fits the following models of air cleaners: GeneralAire SSCB15-WHT GeneralAire SSCB15W-R This General Aire part 4709 is the air cleaner's cover assembly, and is gray in color. The GeneralAire cover

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General Aire Gray Cover Assembly C5-0609
Our Price: $662.13
Retail: $695.24
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GeneralAire Air Cleaner Cell C5-0400
(4712)

The General Aire Air Cleaner Cell C5-0400 fits the following models of air cleaners: GeneralAire GA52F32 GeneralAire SSCB7-WHT GeneralAire SSCB7W-R GeneralAire SSCB15-WHT GeneralAire SSCB15W-R This GeneralAire part number 4712 is the air c

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GeneralAire Air Cleaner Cell C5-0400
Our Price: $299.99
Retail: $399.99
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General Aire Power Compartment Cover G8-0610
(4789)

The General Aire Power Compartment Cover G8-0610 fits the following model of air cleaner: GeneralAire GA52F32 This GeneralAire part 4789 is the air cleaner's power compartment cover. The GeneralAire power comprartment cover G8-0610 is also kno

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General Aire Power Compartment Cover G8-0610
Our Price: $270.10
Retail: $299.99
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General Aire Contact Tray G8-0522
(4792)

The General Aire G8-0522 Contact Tray is the correct replacement part which attaches to the inside lower base section of the main General Air GA52F32 unit. Also known as General Air part number 4792.


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General Aire Contact Tray G8-0522
Our Price: $49.99
Retail: $59.99
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Austin Air HM405 Allergy Machine - White
(HM405 White)

The Austin Air HM405 Allergy Machine - White is an air cleaner that provides clean air for allergy and asthma sufferers. This Austin Air purifier offers users better sleep and less coughing & sneezing through the reduction of smoke, mold, mildew, fu

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Austin Air HM405 Allergy Machine - White
Our Price: $574.99
Retail: $599.99
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Austin Air HM405 Allergy Machine - Midnight Blue
(HM405 MB)

The Austin Air HM405 Allergy Machine - Midnight Blue is an air cleaner that provides clean air for allergy and asthma sufferers. This Austin Air purifier offers users better sleep and less coughing & sneezing through the reduction of smoke, mold, mi

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Austin Air HM405 Allergy Machine - Midnight Blue
Our Price: $574.99
Retail: $599.99
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Trion Air Bear 20x25x5 Comp. Supreme 2000 Filter 2-Pack
(AB20258)

The AB20258 is the correct air filter replacement used in Trion Air Bear, Air Bear Classic, Air Bear Plus 2000 and Trion Air Bear Supreme 2000 Air Cleaners.


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Trion Air Bear 20x25x5 Comp. Supreme 2000 Filter
Our Price: $72.00

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Austin Air HM405 Allergy Machine - Sandstone
(HM405 Sandstone)

The Austin Air HM405 Allergy Machine - Sandstone is an air purifier ideal for allergy and asthma sufferers. This Austin Air air purifier promotes better sleep and less coughing & sneezing through the reduction of smoke, mold, mildew, fungi, allergen

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Austin Air HM405 Allergy Machine - Sandstone
Our Price: $574.99
Retail: $599.99
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Bionaire Foam Humidifier Prefilter A0327W 2-Pack
(A0327W)

The Bionaire A0327W Foam Humidifier Prefilter is used to reduce airborne particles & pollutants with Bionaire CP0305 & CP0306 humidifier systems.


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Bionaire Foam Humidifier Prefilter A0327W
Our Price: $7.98

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Holmes HAPF92 Air Purifier Carbon PreFilter 2-Pack
(ROHAPF92M)

The Holmes HAPF92 Air Purifier Carbon PreFilter-2 Pack fits the Holmes HAP292 model air purifier. This carbon prefilter features Microban technology with anti microbial and anti bacterial filter protection. The Holmes HAPF92 Air Purifier Carbon P


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Holmes HAPF92 Air Purifier Carbon PreFilter
Our Price: $13.98

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General Aire Air Cleaner Fan Motor C5-070D
(4704)

The General Aire Air Cleaner Fan Motor C5-070D is a replacement fan motor for the GeneralAire SSCB15 Ceiling Mount Air Cleaners. The GeneralAire C5-070D fan motor attaches to the C5-0710 fan blade and ensures the proper filtration of airborne partic

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General Aire Air Cleaner Fan Motor C5-070D
Our Price: $399.99
Retail: $499.99
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GeneralAire 101791 Enthalpy Core for ERV3160
(4672)

The GeneralAire 101791 enthalpy core is manufactured for your ERV3160 system. The enthalpy core is a key to your ERV3160 unit's performance. The enthalpy core replacement transfers heat between the two air systems of your ERV3160.

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GeneralAire 101791 Enthalpy Core for ERV3160
Our Price: $469.99
Retail: $499.99
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GeneralAire 101790 Enthalpy Core for ERV3220
(4674)

The GeneralAire 101790 is the correct replacement for the following ventilator: GeneralAire Whole House ERV3220 Ventilator.

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GeneralAire 101790 Enthalpy Core for ERV3220
Our Price: $609.99
Retail: $640.49
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GeneralAire 101804 HRV/ERV Door Switch
(4689)

The GeneralAire 101804 HRV/ERV Door Switch is the correct replacement door switch for the following models of GeneralAire energy/heat recovery ventilators: 3160 3220 8160 8220 This ventilator door switch is a genuine GeneralAire replacement


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GeneralAire 101804 HRV/ERV Door Switch
Our Price: $39.99
Retail: $49.99
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Filters Fast Custom Size MERV-13 Filters 6 Pack
(FFCAFM13)

Filters Fast Air Filters are an economical alternative if you're looking for a quality air filter without paying a premium price! Filters Fast Air Filters are now available in custom sizes! View details for order guidelines...


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Filters Fast Custom Size MERV-13 Filters 6 Pack
Our Price: $40.00
Retail: $41.00
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Holmes HAPF92 Comp Carbon Odor Pre-Filter-2pk
(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-2pk
Our Price: $6.99
Retail: $9.99
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Trane Perfect Fit Filter 14.5x27x5 BAYFTFR14M 3-Pk 3-Pack
(HTRN1427T1)

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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In Stock! Ships in 10 to 11 business days.
Trane Perfect Fit Filter 14.5x27x5 BAYFTFR14M 3-Pk
Our Price: $360.00

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Trion Duct Mount HE Plus 1400, 455601-001C 16"x25"
(455601-001C)

The Trion Duct Mount HE Plus 1400, 455601-001C is an Electronic Whole House Air Purification System. The HE Plus 1400 includes an elctronic air flow sensor. Genuine Trion Fedders product. Learn how the HE Plus 1400 can help you live a healthy life..

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Trion Duct Mount HE Plus 1400, 455601-001C 16"x25"
Our Price: $369.95
Retail: $440.00
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Filters Fast Custom Size Air Filters 6 Pack
(FFCAF)

Filters Fast Air Filters are an economical alternative if you're looking for a quality air filter without paying a premium price! Filters Fast Air Filters are now available in custom sizes! View details for order guidelines.


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Filters Fast Custom Size Air Filters 6 Pack
Our Price: $40.00
Retail: $41.00
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Filters Fast - Air Filters

" Just to express my complete satisfaction with your ordering process and, of course, great pricing. When I need a replacement of refrigerator or HVAC filters, I'll be contacting you again. " - Frank, Corona, CA
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