I haven't had to dust often since I bought an air purifier and used this filter. It saves so much time and hassle by having a cardboard frame and not having to put plastic combs between the folds. I change the filter every 6 months which keeps me dust free but every few months. Sometimes I can do without dust altogether. My used filters are always full of dust and dirt when I take them out, so I know they are doing their job and keeping the air I breathe much cleaner than it otherwise would be.
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