|Featuring Purifiers - Filters - Air Cleaners - For Indoor Pollution Control|
| Reduce Indoor Pollution With Air Cleaners:|
Points To Consider For Your Health
Air cleaners are used as one of three methods of reducing indoor pollutants. In order of effectiveness, the three methods are:
This can be used as an adjunct to source control and ventilation. However, this method alone cannot adequately remove all of the pollutants typically found in indoor air.
Should You Use An Air Cleaner?
Many factors need to be considered in determining whether use of an air cleaner is appropriate in a particular setting. Therefore, the decision whether or not to use an air cleaner is left to the individual.
Will Using This Method Reduce Health Effects?
This method may reduce the health effects from some particles - small solid or liquid substances suspended in air, such as dust or light spray mists.
Some air cleaners, under the right conditions, can effectively remove certain respirable-size particles (for example, tobacco smoke particles). These invisible particles are of concern because they can be inhaled deeply into the lungs. Removing such particles may reduce associated health effects in exposed people. These effects may range from eye and lung irritation to more serious effects such as cancer and decreased lung function.
Some controversy exists about whether air cleaners can reduce the allergic reactions produced by larger particles such as pollen, house dust allergens, some molds, and animal dander. Most of these particles are found where they settle on surfaces in the home, rather than in the air. They cannot be removed by an air cleaner unless disturbed and re-suspended in the air.
Air cleaners that do not contain special media, such as activated carbon or alumina, will not remove gaseous pollutants, including radon, or reduce their associated health effects. Whether air cleaners that contain these media are effective in reducing health risks from gaseous pollutants cannot be adequately assessed at this time. In addition, the effectiveness of air cleaners in reducing the health risks from radon progeny (decay products) cannot be adequately evaluated at present. The removal of gaseous pollutants and radon and its progeny is not addressed further in this fact sheet. Health effects from these pollutants may be serious, however, and they are of concern in indoor air.
Some devices may be installed in the ducts which are part of central heating or air-conditioning systems in homes. Portable units stand alone in a room.
Types of air cleaners include:
Assessing Potential Performance
At a minimum, you should consider the following major factors affecting the performance of the air cleaner:
Additional Factors To Consider
Obtaining Adequate Performance
One common method of rating high efficiency filters uses a procedure in Military Standard 282. This procedure measures how well small particles of a specific chemical are removed by the filter.
The Federal government has not published guidelines or standards that can be used to determine how well low to medium efficiency this type of purifiers work. However, standards have been developed by private standard-setting trade associations. These standards may be useful in comparing air cleaners.