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Frequently Asked Questions

DuPont™ Air Filters offer a wide variety of solutions to help make the air in your home cleaner & healthier.  Here are answers to some of the most commonly asked questions about DuPont™ Air Filters. 

Can DuPont™ Air Filters really improve my indoor air quality? 
Why is Microban® product protection so important on air filters?
 

Do pleated air filters provide better filtration than non-pleated filters?
What does electrostatic mean?

What is the MERV rating?
Will a DuPont™ Air Filter reduce the amount of air flowing through my HVAC system?
Where is my air filter located?
How often should I change my air filter?
How do I change my air filter?
Other brands of air filters claim to not promote the growth of bacteria and mold on their filters. Can this be true?
Why are DuPont™ Air Filters superior to other air filters?
What do I do if I cannot find a DuPont™ Air Filter in my size?
How do I decide which filter is best for my home?
How do the Multi-Size Expandable Filters work? How do I adjust the size of the filter to fit my furnace?
What size Multi-Size filter I should use? 

Can DuPont™ Air Filters really improve my indoor air quality?

For every visible particle trapped in your furnace filter such as dust, dirt, and mold, there are as many as 100 more that you cannot see, including bacteria, fungi, and pollen. If not stopped, these micro particles can seep through your HVAC system and back into your air. Through independent lab testing, DuPont™ Air Filters have been proven to trap a greater percentage of microparticles than conventional fiberglass filters. So the answer is YES, the air in your home can be cleaner.

Why is Microban® product protection so important on air filters? 

Today's high performance filters are capable of trapping micro particles, including some as small as bacteria and fungi, and are designed to last up to 90 days. Unlike some inert particles, which may be trapped in your furnace/air conditioner filter, bacteria and fungi are living organisms. Under certain conditions these microorganisms can multiply on unprotected surfaces, potentially resulting in odors and adversely affecting the filter media. The presence of Microban® product protection in the filter materials is not intended to affect airborne micro organisms, but can help reduce the uncontrolled growth of odor causing microbes on the surface of the filter material itself, where you need it the most.
 

Do pleated air filters provide better filtration than non-pleated filters?

Pleating provides more surface area and increased the dirt holding capacity.  Pleating also helps more evenly distribute the air flow over the surface of the filter.  Unlike DuPont™ Air Filters, non-pleated fiberglass filters were originally developed to protect your HVAC system, but they were not intended to significantly improve your indoor air quality.


What does electrostatic mean?

Electrostatic air filters contain both positively and negatively-charged fibers, allowing them to capture the positively and negatively charged particles from the air and causing them to stick to the filter media.


What is the MERV rating?


MERV stands for Minimum Efficiency Reporting Value.  The rating is derived from a test method developed by the American Society of Heating, Refrigerating, and Air Conditioning Engineers (ASHRAE).  Use the MERV rating as a comparison tool for evaluating the effectiveness of air filters. The higher the MERV rating, the better the filter is at trapping specific types of particles.


Will a DuPont™ Air Filter reduce the amount of air flowing through my HVAC system?


DuPont™ Air Filters are designed to operate in most residential HVAC systems. However, if your air filter remains in use longer than the recommended time period, it may begin to restrict the airflow. If you feel that your air filter is reducing the amount of air flowing through your HVAC system, you may need to change the filter more frequently.


Where is my air filter located?

Your air filter should be located in the return air grill in a wall of your home, inside the furnace, or in the duct somewhere ahead of the furnace.  If you have trouble locating your air filter, contact the manufacturer of your HVAC system.

How often should I change my air filter?

DuPont™ High Performance Air Filters were designed to last up to three months within ordinary household environments. However, the life and effectiveness of the filter can vary depending on the individual conditions within your home.  Unusually dirty duct work, sanding projects, numerous pets, the presence of smokers, or continually running the fan system may shorten the life of your filter.  In these cases you should visually monitor and change the filter more frequently.  Additionally, using a filter longer than its designated lifespan may begin to restrict airflow and impair the overall efficiency of your furnace.  Impaired airflow may also create a backpressure that is too strong for your system and could damage the system’s air handler.


How do I change my air filter?


Caution: Turn furnace fan off before installing filter.  Remove the grill or box cover holding your filter in place.  Carefully remove and dispose of your old furnace filter by placing it in a plastic bag to keep from reintroducing the particles into your air.  Remove the plastic wrap and paper insert from the new filter.  Install the new filter so that the arrow on the side of the frame matches the direction of the airflow.  Record the installation date and the replacement date in the designated space on the new filter frame, and replace the grill cover.

Other brands of air filters claim to not promote the growth of bacteria and mold on their filters. Can this be true?

This is only partially true. Many high performance filters today are made from synthetic fibers. Filters that are made from synthetic fibers are generally made from materials that bacteria and other microorganisms cannot process as a food. However, filters with synthetic media can still have bacteria and other microbes growing on the media. That’s because any bacteria or microbes trapped on a filter will be able to feed off of other matter that is also trapped on the filter – things like pet dander, and pollen for example.


Why are DuPont™ Air Filters more advanced compared to other air filters?

Rigid frame construction, state-of-the-art filter media, and Microban® antimicrobial product protection provide you with an air filter for your home’s heating and/or cooling system that is unequaled by any other 1” residential air filter on the market today. It is the “science inside” that makes our filters so special.


What do I do if I cannot find a DuPont™ filter in my size?

Please refer to the individual product pages for those sizes stocked in stores or through special order. Not all stores carry all sizes of DuPont™ Air Filters. If a store does not carry your size air filter ask the store associate if they can special order the size for you. There are also several styles of Multi-Size and cut-to-size filters available.


How do I decide which filter is best for my home?

DuPont™ Air Filters bring a whole new level of protection & performance to your indoor environment.  Whether your main concern is pollen, pet dander, odor, smoke particles, dust, or all of the above, DuPont offers a filter to meet your family’s air filtration needs.  Click here for a DuPont™ Air Filter Product Comparison Chart.  


How do the Multi-Size Expandable filters work?  How do I adjust the size of the filter to fit my furnace?

DuPont offers the ONLY pleated air filter with a patented frame that allows it to expand and fit multiple return air vent sizes.  This proprietary design allows the filter to easily adjust to multiple sizes.  The filter adjusts in any increment within its size range, and includes 2 quick-fastening clips to lock the filter at the desired size.  Adjusting the size is as easy as 1-2-3 with no tools required:  Step 1 – Remove Locking Clips, Step 2 – Open Frame to Desired Size, and Step 3 – Replace Locking Clips. Click here for additional instructions. 

What size Multi-Size filter I should use?


Multi-Size filters adjust to any increment within the size range listed on the package.  For example, if you normally use a 14x20 fixed-size filter, you should purchase a “14x14 – 14x25” Multi-Size filter, and simply adjust it to fit your furnace.