When thinking about indoor air quality, furnaces and central air conditioners should come to mind. After all, every cubic foot of air in a house is eventually drawn through these systems—and is altered by the process. Air is mixed, filtered and redirected, emerging hotter or colder, wetter or drier, cleaner or dirtier than it was before.
Treating your indoor air as it passes through the forced-air system ductwork is not a new idea. Most furnaces already have built-in dust filters and some are equipped with humidifiers. However, the latest filters are far more effective than standard models, and adding or upgrading a humidifier is a simple way to enhance comfort and health.
In addition to these two components, we’re including something new—a pair of ultraviolet light probes designed to kill molds and bacteria. Ultraviolet (UV) lights have been used for years to kill germs in hospitals and municipal water systems, so they should work in homes as well.
This project was originally published in the September 2001 issue of Popular Mechanics
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