An air cleaner/purifier automatically removes airborne contaminants such as dust, pollen, pet dander, mold spores, dust mite feces and second-hand smoke. In fact, today's latest products are becoming increasingly capable of capturing a greater number of bacterial, viral, and DNA particulates.
While often marketed to allergy sufferers and asthmatics, everyone can literally breathe easier knowing that far fewer of these vile substances are finding their way into our loved ones' lungs.
Some air cleaners/purifiers use only a small amount of electricity, causing only a small impact on your expenses and the environment.
We recommend the following air cleaners/purifiers:
Trane CleanEffects

Enjoy up to 99.98% cleaner air with "the world's most effective whole-house air filtration system." Trante CleanEfffects removes more airborne allergens from the filtered air in your home than any other cleaning system. This breakthrough, patented technology has been performance-verified by the Harvard School of Public Health.
Honeywell Electronic Air Cleaner & Media Filter

This advanced, whole-house solution traps and filters up to 98% of pollutants from the air passing through your heating and cooling system. Three-stage filtration includes exclusive electrostatic posifilter that improves filtration with minimal resistance to airflow. Optional Air Watch™ system reminds you to wash the filter cells.
Lennox PureAir® Air Purification System

Removes over 95% of particles. The only single indoor air quality system to attack all three classes of indoor air contaminants: small, breathable particles such as dust and dirts; airborne mold spores, bacteria and viruses; odors and chemical vapors.