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    Standard Sizes ship in 3 business days or less
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  3. * Typical processing times are not guaranteed
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If you are unhappy with your purchase, please let us know and we will gladly accept returns within 30 days of purchase.
  1. All items must be in their original condition and in their original packaging
  2. Custom sized filters are not eligible for returns
  3. Returns will be refunded in the original method of payment minus cost of shipping
  4. Orders over $250 are subject to a restocking fee of 10%
Email us at support@factorydirectfilters.com, please include your order number and reason for return.
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    The information that is given to Factory Direct Filters will be solely used to fulfilling your order. We will not sell or distribute any personal information to anyone. Phone numbers are requested in case a sales representative would need to contact you to schedule a delivery time. E-mail addresses will only be used to acknowledge receipt of your order and send you newsletters if you requested. Reminders will also be sent when it is time to change your air filter or reorder. You always have the option of opting-out of this type of correspondence. Credit card numbers are only stored when you choose a recurring billing option, and if that is the case, they are stored at our payment processor's secure server.

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  1. Essentially your air conditioner filter is a collector of dust, dirt, grime and other nasty microscopic things that float around your home. When your heating or cooling system is turned on, it collects these particles to protect your system and clean your home's air. Like the lint trap in your dryer, it accumulates a thick layer of these air borne particles as it circulates air throughout your home.
  2. Once it has trapped a certain amount, it becomes full and ineffective and gradually restricts the air flow moving through your system. This requires your system to work harder to keep you cool or warm, wasting energy and increasing your monthly bill. As air filters get dirtier, they also become less effective at capturing the airborne germs and pollutants that can irritate your family’s breathing. Stuffy noses, sneezing, allergies and even asthma are triggered. Your family inhales what your filter can’t handle any longer.
  3. An old and forgotten filter can eventually accumulate so much dirt and grime that it can totally choke off the air flow to the system causing a myriad of problems. In the worst case, the filter will be sucked into the blower motor and cause thousands of dollars in damage to your system.
Modern central heating and air conditioning systems generally have the filter located as close to the blower unit as possible, in the cold air return duct. Remove the grill or box cover holding your filter in place.
Remove the dirty filter:
Dispose of the dirty filter in a bag to contain the dirt.
Install the new or cleaned and dried air filter with the air flow arrow pointing toward the blower. Record the date and wash or change the filter within the recommended period. If you experience higher dust levels in your home due to changes in outside air, construction or dry weather, you may need to change or wash your filter more frequently than the recommended period. For questions or concerns about the location or installation of the filter contact the HVAC manufacturer or a reputable HVAC contractor.
The life of your filter depends on your environment and the type of filter you have installed. To put it simply, there really is no concrete answer to this question. Certain things such as:
  • the number of people who live in your home
  • if there are pets in the house
  • if there is a smoker in the house
  • if you leave the windows open
  • if you have pollen bearing trees or plants in the neighborhood
  • if you live in an area with a lot of dampness
  • if you live in an area that is dry or arid
  • plus many others
If several of these factors sound familiar, you’ll likely experience a quicker loading of particles on your filters and will consequently have to change it more often. A good rule of thumb is to check every month. If you can hold the filter up to a light and not see through it, it is time to change your filter. At an absolute minimum, you should change your filter every three months. A clean air filter will also prevent dust and dirt from building up in the system, which could lead to expensive maintenance and utility bills.
There is more than one problem that can arise from not regularly changing your air filter. These problems can be broken down into three major categories: mechanical, energy consumption and health.
Energy Consumption:
It’s simple really, the harder your HVAC system works, the more energy it will consume. The more energy it consumes, the higher your energy bills. A basic filter maintenance program like the Clean Air Club can save you hundreds, possibly thousands of dollars a year.
A dirty air filter of any type may result in extensive damage to the fan blower motor or compressor in your air handler. Dirt and grime accumulate on crucial moving parts causing them to fail much quicker than expected. This can be very costly and sometimes leads to a total system replacement. At the very least, your system life expectancy will be reduced significantly.
Most importantly, not regularly changing your air filter can cause potential health problems for your family. Consider these facts from the EPA:
  • Each person inhales over 3,500 gallons of air each day. Children inhale more particles for their size than adolescents or adults
  • Polluted air causes 94% of all respiratory problems
  • An estimated 10-15% of the entire population may be allergic to cat or dog dander
  • More than 31 million Americans have been diagnosed with asthma, about 1/3 are children under 18
  • About 40,000 dust mites, a common household allergen, can live in one ounce of dust
  • A person sheds up to 700,000 skin flakes per day
Your air conditioner filter is the primary defense to reduce and hold these health issues at bay. A quality home air filter changed on a regular schedule is a small investment for your family’s health.
Fiberglass filters last up to 30 days. Pleated filters can last up to 90 days. Washable filters should be washed every 30 days and last up to 5 years. Mini-pleated filters should be vacuumed every 60 days and will last up to one year. There is no "standard expectancy" for an air filter. It all depends on each home's characteristics, how many people live there, if there are pets, if there are smokers, how much air pollution and pollen is in your town, etc... The best way to make sure you are changing your air filter on time is to be proactive and regularly check it. Mark it on your calendar, schedule it in your phone, or put a note on the refrigerator.
Minimum Efficiency Reporting Value, or MERV for short, is a filter rating system devised by the American Society of Heating, Refrigeration and Air conditioning Engineers (ASHRAE) to standardize and simplify filter efficiency ratings for the public. The higher the MERV rating, the higher the efficiency of the air filter. Simply stated, a MERV 12 filter will remove smaller particles from the air than a MERV 8 filter. For the consumer this means that you now have the ability to effectively compare one filter to another. In general, any MERV 8 or 11 filter will perform about the same as any other MERV 8 or 11 filter, respectively. The MERV rating only applies to efficiency. Additions such as carbon, Lysol anti-bacterial treatment and Arm & Hammer baking soda are value-added benefits and are not an expression of the MERV rating system. If allergies or asthma are your concern, we suggest you choose a MERV 8 filter or higher.
MERV is an acronym that stands for Minimum Efficiency Reporting Value.

What is a MERV Rating?MERV Rating is a filter comparison system designed by an industry group called the American Society of Heating, Refrigeration and Air-conditioning Engineers (ASHRAE). Simply put, it's a rating scale designed to allow consumers to easily compare the performance of one filter to another.

Why is there a MERV Rating?It is designed to measure a filter's ability to capture and hold particles and pollutants. The higher the MERV rating, the more particles - dust mites, pet dander, air allergens, etc - your filter will remove from the air. Of course, screening out more particles from your air makes your air handler work a bit harder, so you may see a modest increase in power consumption by your air conditioning or furnace unit when choosing a higher MERV Rating.

How a MERV Rating benefits you?Matching the right MERV rating to your needs will improve your home's air quality and will extend the life of your furnace or air conditioner.

Which MERV rating is right for you?

MERV 6 Fiberglass Air Filters
MERV 6 fiberglass filters are a low cost solution and will help fight dust mites, lint and pollen. Fiberglass air filters are disposable and must be changed every 30 days or less
MERV 8 Pleated Air Filters
MERV 8 pleated air filters are an ideal upgrade from fiberglass media. They are more efficient at capturing dust mites, lint and pollen and will last up to 90 days during mild weather seasons
MERV 11 Pleated Air Filters
MERV 11 pleated air filters provide superior air filtration and efficiency and can capture more micro allergens such as pet dander. Our pets are important members of our family but pet dander can produce allergens that make breathing difficult. MERV 11 air filters are just what pet owners need to improve air quality at home.
MERV 13 Pleated Air Filters
MERV 13 pleated air filters are over 30 times more efficient at capturing micro particles than ordinary filters. They can capture dust mites, lint, pollen, pet dander, smog and other virus carriers less that one micron in size. They are recommended for homes with allergy and asthma sufferers.
Learn the facts and your next purchase will be much easier on your wallet.

Why 3 different rating systems?The three rating systems were created by different organizations. MERV is the domestic and international Industry Standard rating system established by the American Society of Heating, Refrigerating, and Air Conditioning Engineers. The other two rating systems were created by "3M" and "The Home Depot", but at the end of the day they are rating the SAME filter!

MERV Rating (Minimum Efficiency Reporting Value):As you have already learned, the MERV Rating is the primary rating system used in the industry, both domestically and internationally. Established by the American Society of Heating, Refrigerating, and Air Conditioning Engineers, MERV rates a filter’s ability to capture and hold particles and pollutants.

MPR (Micro-Particle Performance Rating):MPR Rating is a rating system developed by 3M. It rates the manufacturer’s filters and their ability to capture airborne particles smaller than 1 micron.

FPR (Filter Performance Rating):FPR Rating is a rating system developed by The Home Depot for brands sold through their stores, including Honeywell. It utilizes a color code and number scale (4 to 10) that closely resembles the MERV rating.

Compare MERV, MPR, and FPR with the chart below.

7/ Red
Captures dust and pollen
Dust, pollen, dust mites, lint
MERV 8 + mold spores, bacteria, smoke, pet dander
MERV 11 + virus carriers and odors
Change Frequency
30 Days
60-90 Days
60-90 Days
60-90 Days
That's it! You now know the difference between MERV, MPR and FPR Rating Systems.