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Air Purifier Filters - Filters for Air Purifiers

  • True HEPA Filters
  • ULPA (Ultra HEPA) Filters
  • HEPA Type Filters
  • Activated Carbon Filters
  • Antimicrobial Filters
  • Pre Filters
  • Intermediate Filters
  • To experience the full benefits of air purifiers, the air purifier has to be properly selected to meet many important criteria. To select the right air purifier for your air cleaning needs, follow few simple steps below.

    True HEPA Filters

    HEPA filters are regarded as the best form of air filtration devices available today. HEPA stands for High-Efficiency Particulate Arrestance. According to U.S. Military Standard MIL-STD-282, HEPA filters are defined as air-cleaning devices that have a proven minimum removal efficiency of 99.97% of particles in the air equal to 0.3 um (microns) in diameter with higher efficiency for both larger and smaller particle sizes. The reason 0.3 microns is used in the definition is because it’s the particle size in which all mechanical filters are LEAST efficient in capturing and removing from the air. A particle size of 10 microns or less is not visible to the naked eye.

    True HEPA filters are made of true HEPA filter media. HEPA is the acronym for High Efficiency Particulate Arresting. identify the range of air contaminants and air pollutants that create the unhealthy or uncomfortable air conditions in your indoor environment and identify their source.

    The most common solid airborne contaminants found in residential and office environment are: microscopic dust, mold spores, plant spores, dust mites and debris, pet dander, bird feather dust, ground talc, cement dust, pollen, etc.

    The use of true HEPA filter in the air purifier's air filtration system does not automatically guarantee that the actual filtration efficiency of true HEPA filter will be the same as the efficiency of true HEPA filter media. The filter making process (warm rolled process protects HEPA filter media from cracking and tearing), the number of pleats per liner inch, the consistency of the gap between the pleats ensured by separators, the quality of filter seal gaskets are the major factors that affect the overall filtration efficiency of true HEPA filter in HEPA air purifiers.
    In a meantime, the size of true HEPA filter (amount of HEPA filter media used) and the Air Flow Rate are the main factors that directly affect the overall air filtration capacity and air cleaning performance of HEPA air purifiers.

    Beware of the air purifiers that use HEPA Type filters instead of the real True HEPA filters.
    HEPA type filters are often made of a significantly lower grade HEPA filter media or the polyester based filtration material. HEPA type filters usually have significantly lower filtration efficiency and filtration capacity compared to the real True HEPA filters. The significantly lower filtration capacity also results in a much shorter filter's lifetime - usually 6 to 12 months vs. 3 to 5+ years for True HEPA filters. As a result, HEPA type filters require more frequent filter replacements.

    The most common gaseous air pollutants are: cuisine odors, pet odors, cigarette (tobacco) smoke, smoke from wood burning stove, off-gassing from office machines, furniture, electronics, off-gassing from fresh paint, wallpaper, carpeting, household cleansers, lawn fertilizers, mycotoxins released by mold and mildew, off-gassing from construction materials (in newly built houses), etc.

    Airborne pathogens such as, bacteria, germs, viruses, microbes is another group of air contaminants that may significantly affect the air quality and create severe respiratory problems.

    ULPA (Ultra HEPA) Filters
    After identifying the range of air contaminants that affects the air quality in your environment and their source, browse the range of air purifiers to select the air purifier models that have the air filtration system specifically designed to target this particular range of air pollutants and air contaminants.

    The following web page Air Purifiers by Air Filtration Efficiency displays the air purifier models in order of their filtration efficiency for different airborne contaminants and pollutants, whether they are solid airborne contaminants, gaseous chemicals or airborne pathogens (microorganisms).

    The following web page Air Purifiers by Application displays the air purifier models that are specifically designed to deal with the most common and specific air quality conditions, such as:

    HEPA Type Filters
    After identifying the range of air contaminants that affects the air quality in your environment and their source, browse the range of air purifiers to select the air purifier models that have the air filtration system specifically designed to target this particular range of air pollutants and air contaminants.

    The following web page Air Purifiers by Air Filtration Efficiency displays the air purifier models in order of their filtration efficiency for different airborne contaminants and pollutants, whether they are solid airborne contaminants, gaseous chemicals or airborne pathogens (microorganisms).

    The following web page Air Purifiers by Application displays the air purifier models that are specifically designed to deal with the most common and specific air quality conditions, such as:

    Activated Carbon Filters

    To provide an adequate air cleaning result and maintain the air quality at a sufficient level, the air purifier should draw the entire volume of air in the room through the air filtration system several times an hour.

    Activated Granular Carbon Filters

    It is obvious, the higher the number of times the polluted air is drawn through the air filtration system of the air purifier, the higher air quality it can maintain in the same room.
    Some air purifier manufacturers, to make a better impression on the potential buyers about the air cleaning performance of their units, use two air exchanges per hour as a default number for calculating the maximum cleaning area.
    However, in most cases, this is barely enough to make the difference in the air quality noticeable.
    The default number of air changes per hour used by the Association of American Home Appliance Manufacturers (AHAM) is 6 (six).
    According to allergists and clean air specialists, for individuals having serious respiratory condition or a health problems, this number has to be as high as 10 or even higher.
    Therefore, while selecting the right air purifier for the size of your cleaning area, always go by six (6) as a minimal number of air exchanges per hour. In the air purifier technical specification this usually corresponds to the size of recommended cleaning area.

    Coconut Shell Carbon Filters

    Please note, the cleaning area is always calculated for the area with default height of the ceiling of 8 feet. However, the number of air exchanges per hour goes down proportionally, as the height of the ceiling goes up.

    Peatmoss Carbon Filters

    The size of the cleaning area is always provided for the air purifier running on High speed setting. No doubts, in most air purifiers this is the noisiest setting, and it is doubtful that you'll be willing to run the unit on this setting for a long time.
    Therefore, to make sure that the air purifier maintains the required number of air exchanges per hour while operating on a quieter Medium speed setting, select the air purifier designed for the room size at least 25% to 30% larger than the actual room size you look the air purifier for.
    Besides, having a more powerful unit running in your room gives you an extra cleaning power when you need it.

    Specialty Enhanced Carbon Filters

    While looking for the air purifier for combined open area such as, living/dining area or other, please do not forget that the air purifier will be able to maintain the highest cleaning result in the same room the unit is sitting in. The air quality can be improved in the adjoining room(s) only if the air can circulate freely between the rooms. Otherwise, for best air cleaning result throughout the house or apartment, consider the option of getting separate air purifier for each room, large open area or the floor.

    Cloth-Embed Dust Carbon Filters

    Antimicrobial Filters
    The most important factors affecting the overall level of noise produced by the air purifier are:
  • Quality of the Motor/Fan Assembly.
    Factory balanced one piece Motor/Fan assembly used in AirPura Air Purifiers, Sharp Air Purifiers and Amaircare Air Purifiers air purifiers helps eliminate vibration associated with traditional design where fan is attached to the motor shaft with a set screw (AllerAir Air Purifiers, Austin Air Purifiers air purifiers). This contributes significantly to the reduction of noise level form the air purifier.
  • Ability of the Air to Move through the Air Purifier without Changing Directions.
    Unimpeded Air Flow that can move through the filters without changing directions and without creating turbulence allows significantly reduce the level of noise on all speed settings.
  • Size of Air Intake and Clean Air Outlet.
    Inadequate or insufficient size of polluted air intake or clean air outlet can create significant back pressure to the moving through air. This may result in severe turbulence in the air purifier, and in substantially higher level of noise.
  • To compare the air purifiers by level of noise please click here: Air Purifiers by Level of Noise.

    Intermediate Filters
    The most important factors affecting the overall level of noise produced by the air purifier are:
  • Quality of the Motor/Fan Assembly.
    Factory balanced one piece Motor/Fan assembly used in AirPura Air Purifiers, Sharp Air Purifiers and Amaircare Air Purifiers air purifiers helps eliminate vibration associated with traditional design where fan is attached to the motor shaft with a set screw (AllerAir Air Purifiers, Austin Air Purifiers air purifiers). This contributes significantly to the reduction of noise level form the air purifier.
  • Ability of the Air to Move through the Air Purifier without Changing Directions.
    Unimpeded Air Flow that can move through the filters without changing directions and without creating turbulence allows significantly reduce the level of noise on all speed settings.
  • Size of Air Intake and Clean Air Outlet.
    Inadequate or insufficient size of polluted air intake or clean air outlet can create significant back pressure to the moving through air. This may result in severe turbulence in the air purifier, and in substantially higher level of noise.
  • To compare the air purifiers by level of noise please click here: Air Purifiers by Level of Noise.

    Pre Filters

    Polyester Based Pre Filters

    Avoid air purifiers that produce Ozone directly or as a by-product. Ozone is a gas pollutant and can cause severe respiratory and other health problems.

    Permanent Washable Pre Filters

    While choosing the air purifier, always go by the Recommended Room Size instead of the Maximum Cleaning Area. The maximum cleaning area is used by air purifier manufacturers primarily for advertising purposes. It is based on 2 (two) air changes per hour for the air purifier running on High speed setting, which is barely enough to make the difference in the air quality noticeable.
    Instead, the recommended room size is based on 6 (six) air changes per hour, and represents the size of the room in which the air purifier can maintain relatively high air quality.
    To get the same air quality from the air purifier running on a quieter lower setting, go by the room size 25% - 30% larger than the actual room size you need the air purifier for.

    Tar-Trapping Pre Filters

    Manufacturer's warranty is another factor of great importance to pay attention at, while choosing the air purifier for your home or office.
    The duration of Manufacturer's limited warranty reflects the commitment of the air purifier manufacturer to the overall quality and reliability of air purifiers they make.
    To compare the range of air purifiers we offer by the duration of Manufacturer's limited warranty please click here: Air Purifiers by Warranty Duration

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