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$3 FACTORY REBATE AVAILABLE THROUGH MARCH 31ST, 2011 Filtrete® Ultra Allergen Reduction Filter from 3M - #2003 - 6 pack The Filtrete® Ultra Allergen Reduction Filter carries a 3M Microparticle Performance Rating (MPR) of 1500 - roughly equivalent to a MERV 12 rating Click here for detailed comparison of 3M Filtrete® 1" Filters Features: Meets the American Lung Association® Health House® Indoor Air Quality Guidelines No unnecessary antimicrobial chemicals added; Filtrete filtering material will not support the growth of bacteria, mold, mildew or fungi in normal use Contains electrostatically charged media to filter and attract particles in the air 90% effective at capturing large allergens like: Pollen Mold spores Dust mite debris Attracts and captures microscopic allergens like: Smoke Pet dander Household dust Smog Bacteria Particles that carry viruses * This filter should be changed at least every 3 months. Certain conditions in your home will significantly add particles to the air - this will cause the filter to capture more particles, shortening it's life to less than 3 months. These conditions would include: dirty ductwork, pets, construction work, sanding projects, tobacco smoke, burning candles, fireplaces and wood-burning stoves. WHY USE MPR RATHER THAN MERV RATING? The Heating, Ventilating and Air Conditioning (HVAC) industry uses the ASHRAE 52.2 Standard, which assigns a Minimum Efficiency Reporting Value (MERV) to a filter. One part of MERV reports a filter's ability to capture medium to large particles between 1 and 10 microns. This value is helpful in comparing the performance of different filters but it is not adequate alone because particles greater than one micron make up only about 1% of the contaminants in your indoor air. Another part of MERV addresses submicron particles. 3M calls this the MPR or Microparticle Performance Rating. It measures a filter's ability to capture particles between 0.3 and 1.0 micron. Based on independent laboratory tests, 3M's MPR measures a filter's ability to capture submicron particles that make up 99% of the particles in the air, such as bacteria, smoke and smog.

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