If you are wondering why this is an important thing to consider, there are two big reasons. 1) HEPA filters trap small particles that may affect allergy sufferers and dust mites certainly fit that description. 2) HEPA filters are tested and carry documentation right on them so you can see exactly how effective the filter is and to what degree it removes the targeted particles.
In addition to using the proper kind of vacuum, regular vacuuming is also recommended.
This series of posts has attempted to provide readers with some suggestions on how to control dust mites in the home. However, these practices have not been mentioned or recommended as a replacement to regularly having your carpets and upholstery cleaned by a professional. Rather, using these suggestions in conjunction with the regular professional cleaning will ensure that you are doing everything in your might to win the fight against dust mites.