If my home's air filters are clean when I change them, are they really working?

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  • Autry, James A. and Gerald M. Knox, eds. Better Homes and Gardens Complete Guide to Home Repair, Maintenance & Improvement. Des Moines, IA: Meredith Corporation, 1980.
  • Barnett, Dwight. "Low Air Pressure and Dust." Home & Garden Television. 2009 (Accessed 4/27/2009). http://www.hgtv.com/home-improvement/low-air-pressure-and-dust/index.html
  • Brumbaugh, James E. Audel® Heating, Ventilating and Air Conditioning Library, Volume 1. New York: Macmillan Publishing Company, 1986.
  • Furnace Compare. "Frequently Asked Questions about Furnace Filters." Furnace and Air Conditioner Filters. 2009 (Accessed 4/27/2009). http://www.furnacecompare.com/faq/furnace_filter_faq.html
  • Home & Garden Television. "Keep Dust Down." Home Improvement. 2009 (Accessed 4/27/2009). http://www.hgtv.com/home-improvement/keep-dust-down/index.html
  • Home & Garden Television. "Spring Cleanup List Begins with HVAC." Home Improvement. 2009 (Accessed 4/27/2009). http://www.hgtv.com/home-improvement/hvac-a-spring-fix-up-checklist/index.html
  • Howarth, Peter and Anita Reid. Allergy-Free Living. Great Britain: Mitchell Beazley, 2000.
  • Huber, Jeanne. "The Dirt on Furnace Filters." The Washington Post, January 19, 2006. (Accessed 04/27/2009). http://www.washingtonpost.com/wp-dyn/content/article/2006/01/18/AR2006011800470.html
  • INDA. "Air Filters for Your Home." International Nonwovens & Disposables Association. 2009 (Accessed 4/27/2009). http://www.inda.org/enduses/homefilters/index.html
  • Lowe's. "Choosing a Home Air Filter." Buying Guides. 2009 (Accessed 4/27/2009). http://www.lowes.com/lowes/lkn?action=howTo&p=BuyGuide/ChooseFurnaceFilter.html
  • Williams, Freddie. Instructor of Air Conditioning Technology, Lanier Technical College, Oakwood, Georgia. Interview, May 5, 2009.