Filters are either disposable or reusable and are made from materials such as fiberglass, metal, man-made, or natural fibers. Factors that affect filter efficiency include fiber size, fiber density, airflow rate, and particle diameter. When selecting filters for your home, consider what your needs are for filtering the air, initial filter cost, filter replacement, and how long it will be effective.
For descriptions of the various filters and tips for their use, visit the website: http://www.healthhouse.org/tipsheets/TS_FurnaceFilters.pdf Reference: American Lung Association
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