I've been using these filters for about a month and I'm very satisfied so far. We used Honeywell, the highest grade, more expensive, and we also used 3M Purple, also the highest grade. I have used cheaper filters in the past and within the first week I could see a difference immediately. And this one is very similar to others that have been used and at a much better price. I am very happy with it and will continue to buy it. I love that the filter itself is gold in color, it helps you see the dirt and makes it easier to tell when it needs to be replaced. .The air quality seems really good, especially now in spring when all the allergens are out. And I suffer from allergies. And when I'm in my house, I'm fine. So I think he's doing his job.
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