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SIMPLY STATED:  The higher the MERV rating, the higher the efficiency of the air filter. A MERV 11 filter will remove smaller particles from the air than a MERV 4 filter. MERV Ratings, allow the consumer to effectively compare one brand to another. MERV Ratings Defined By Ron Wilkinson, P.E. © April, 2001 > SEE ALSO: FEATURED INDOOR AIR QUALITY PRODUCTS... Guidelines: *General VERY LARGE Particle Capture: Use an Economy Fiberglass Filter. MERV 1-2 Rating. *Home: Use a Polyester, MERV 4 Rated, or Pleat Filter with a 7 or 8 Rating (or Higher). *Commercial Buildings and Schools: Use a Filter with a MERV 11-14 Rating. Green Building Filters, LEED Filters >Click Here 1) Use a Good Air Filter. (Dust and Dirt Control). 2) Use a High Output UVC Emitter at your Cooling Coil to destroy Mold, Bacteria and Viruses, and to Provide Allergy Relief, Asthma Relief. The additional Benefit is that your Cooling Coil stays clean...SAVING ENERGY! UVC Petri-Dish Test. Mold Count before UVC and After UVC! 3) If Odors come from other sources besides Mold and Bacteria that grow on your Cooling Coils, use a High Quality "Odor Adsorption" Filter Product.  (CONTACT US for Assistance ).

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