Filtrete Healthy Living Ultimate Allergen Reduction Filter, MPR 1900 filters are higher quality filters that offer a good balance of fine particle filtration and no airflow restriction. On my system, an MPR 1900 seems to be the limit of filtering before I realize my system needs to work harder. These filters trap dust, bacteria, germs, viruses and allergens. They are designed to last up to 3 months, but I can stretch them a bit longer. Filtrete Healthy Living Ultimate Allergen Reduction Filter MPR 1900 filters are neither the cheapest nor the most expensive. They work great for their price. I recommend them. One more note. After reading many other reviews, there have been issues with people receiving the wrong filters, bulk filters or filters with no label. I ordered 2 packs sold and shipped by Revain. I received shrink-wrapped, properly labeled retail packaging as shown in the attached photo.
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