Air Purifiers Air Purifier Buyer's Guide, Guide for Buying Air Purifiers.

Air Purifier Buyer's Guide.

Air Purifier Buyer's Guide

Simple Guide for Choosing the Air Purifiers:

Identifying the Source of Air Pollution
Selecting Air Purifiers for Specific Air Conditions
Selecting Air Purifiers by Room Size
Selecting Air Purifiers by Energy Efficiency
Selecting Air Purifiers by Level of Noise
Important Things to Remember About Air Purifiers

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.

Step 1: Identifying the Source of Air Pollution
First, 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 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.

Step 2: Selecting Air Purifiers for Specific Air Conditions
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 purifiers 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 purifiers that are specifically designed to deal with the most common and wide range of specific air quality problems, such as:

  • All Purpose Air Purifiers
  • Allergy Air Purifiers
  • Air Purifiers for Tobacco (Cigarette) Smoke
  • VOC Air Purifiers
  • MCS Air Purifiers
  • etc.
  • Step 3: Selecting Air Purifiers by Room Size

    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.
    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 air purifiers, 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.

    To compare air purifiers by the Size of the Cleaning Area click here: Air Purifiers by Room Size.

    Important Things to Remember About the Room Size.

    Height of the Ceiling.

    Please note, the cleaning area is always calculated for the area with the 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.

    Size of the Cleaning Area and Speed Setting.

    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.

    Combined Cleaning Area.

    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.
    Step 4: Selecting Air Purifiers by Energy Efficiency

    Power Consumption - Energy Efficiency.

    To maintain clean and healthy environment all the time, most air purifiers are designed to run 24 hours a day 7 days a week. Under those circumstances, the power consumption or the energy efficiency of the air purifier becomes the factor of major importance.
    The air purifiers that use high quality DC (Direct current) motor, like Sharp air purifiers and AIRGLE air purifiers, are much more energy efficient devices than the air purifiers using the traditional AC (Alternating Current) electric motors. The difference in power consumption on Low speed setting could be as significant as up to 10-15 times. This may transform into hundreds of dollars in savings over few year period.
    To compare the air purifiers by their Energy Efficiency (Energy Consumption) please click here: Air Purifiers by Energy Efficiency.
    The easiest way to identify the level of energy efficiency of any particular air purifier is to look if the air purifier bears the Energy Star Logo.
    Step 5: Selecting Air Purifiers by Level of Noise
    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 the 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 the 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 a substantially higher level of noise.
  • To compare the air purifiers by level of noise click here: Air Purifiers by Level of Noise.

    Important Things To Remember About Air Purifiers.

    Toxic off-Gassing from the Air Purifiers.

    While choosing the air purifier, remember, the air purifier itself can become the source of air pollution.
    The most common sources of possible off-gassing from air purifiers are: plastic housing, plastic parts, hot motor windings, oil vapors emitted by low quality electric motors, rubber gaskets, glues, silicon, etc.
    To minimize the effect of possible off-gassing on the air quality and reduce the risk of respiratory problems in individuals with Multiple Chemicals Sensitivity (MSC) choose the air purifiers that employ:
    - the all metal housing with bakes on powder coating,
    - minimal number of plastic parts,
    - environmentally safe "green" materials,
    - high quality electric motor with minimal varnish on motor windings,
    - non off-gassing filter seal gaskets (such as felt gaskets used in AirPura Air Purifiers air purifiers),
    - metal frames and flanges in filters design instead of vinyl or polypropylene ones,
    - minimum or no glue, adhesive or other compounds.

    In AirPura air purifiers the electric motor and the electric components are placed in the separate chamber away from clean air flow. This helps dramatically reduce the possibility of re-contamination of the already filtered air on its way out.

    AIRGLE 750 air purifier has the whole set of filters installed at the clean air outlet. This design of the air filtration system ensures that the filters trap all airborne solid and gaseous air contaminants, including the possible off-gassing from the air purifier motor, before the air gets back into the room.

    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.

    Maximum Cleaning Area vs. Recommended Room Size.

    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.

    Manufacturer's Warranty.

    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 all air purifiers we offer by the duration of Manufacturer's limited warranty please click here: Air Purifiers by Warranty Duration
  • Air Purifiers by Air Purifier Brand
  • Air Purifiers by Air Purifier Application
  • Air Purifiers by Air Filtration Efficiency
  • Air Purifiers by Air Purifier Performance
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