The combination of high arrestance and low resistance is the balance that today's high efficiency systems need. The Allergy Gold is the perfect balance of high arrestance, 90%, and low resistance at .12" w.g. The Allergy Gold utilizes a patented configuration of alternative polarity, self-charging layers of polypropylene filtration media, to attract particles as small as .1 micro. (one micron is 1/25,000 of an inch!)

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