Find an AC contractor to install you an Aprilaire Air filter as a part of your normal AC in your house. You do not need the digital (automation) portion of this, only the Aprilaire filter receiver in lieu of the normal Air Filter you already have on your system. After they do that, then order your Aprilaire replacement filters from Amazon and you'll be able to change them yourself as needed. This is what I use and I got it because of the dust problem you mention. And, yes it does work. Just don't let them sell you all the replacment thermostats and digital stuff that you can also buy with this system. All you need is the filter hold apparatus installed on your system.
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