The completely sealed system in the ART. by Miele models S930 and S938 vacuums, when equipped with a Certified HEPA Filter, will retain 99.97% of pollens, household dust, dust mite droppings and other allergens as small as 0.3 ?m in size. This filter is highly recommended for those who have dust related allergies or asthma. For similar products see our list of current Miele Vacuum Supplies.   View Larger Image