Miele commissioned IBR, an independent testing laboratory in Germany, to do a study on particle emissions comparing Miele vacuums to both bagged and bagless competitors. A condensed version of the results are depicted below.
Clearly, bagless vacuums lose when air polution is your main concern. Whether you suffer from asthma, allergies, or you just want a healthier choice, the choice is clear. Buy a Miele!
See complete test results here: Miele Test Results