Gracie,
We bought an Aprilaire whole house system, for our home in Illinois and LOVED it! It not only helped with hubby's alergies but kept the dust down in the house! The house stayed clean! I don't think it was too expensive and you only change the filter once a year! I did a lot of research with consumer reports before I bought it. I don't know if someone else has come out with a better system since then but I know it was considered the best then and really worked for him!
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